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-rw-r--r--hw/arm/allwinner-a10.c50
-rw-r--r--hw/arm/allwinner-h3.c57
-rw-r--r--hw/arm/armsse.c174
-rw-r--r--hw/arm/armv7m.c18
-rw-r--r--hw/arm/aspeed.c60
-rw-r--r--hw/arm/aspeed_ast2600.c133
-rw-r--r--hw/arm/aspeed_soc.c96
-rw-r--r--hw/arm/bcm2835_peripherals.c81
-rw-r--r--hw/arm/bcm2836.c17
-rw-r--r--hw/arm/cubieboard.c6
-rw-r--r--hw/arm/digic.c16
-rw-r--r--hw/arm/digic_boards.c2
-rw-r--r--hw/arm/exynos4210.c48
-rw-r--r--hw/arm/exynos4_boards.c11
-rw-r--r--hw/arm/fsl-imx25.c64
-rw-r--r--hw/arm/fsl-imx31.c43
-rw-r--r--hw/arm/fsl-imx6.c76
-rw-r--r--hw/arm/fsl-imx6ul.c105
-rw-r--r--hw/arm/fsl-imx7.c100
-rw-r--r--hw/arm/highbank.c28
-rw-r--r--hw/arm/imx25_pdk.c10
-rw-r--r--hw/arm/integratorcp.c6
-rw-r--r--hw/arm/kzm.c5
-rw-r--r--hw/arm/mcimx6ul-evk.c7
-rw-r--r--hw/arm/mcimx7d-sabre.c7
-rw-r--r--hw/arm/microbit.c22
-rw-r--r--hw/arm/mps2-tz.c79
-rw-r--r--hw/arm/mps2.c26
-rw-r--r--hw/arm/msf2-soc.c25
-rw-r--r--hw/arm/msf2-som.c12
-rw-r--r--hw/arm/musca.c60
-rw-r--r--hw/arm/musicpal.c8
-rw-r--r--hw/arm/netduino2.c4
-rw-r--r--hw/arm/netduinoplus2.c4
-rw-r--r--hw/arm/nrf51_soc.c30
-rw-r--r--hw/arm/nseries.c8
-rw-r--r--hw/arm/omap1.c16
-rw-r--r--hw/arm/omap2.c16
-rw-r--r--hw/arm/orangepi.c6
-rw-r--r--hw/arm/pxa2xx.c8
-rw-r--r--hw/arm/pxa2xx_gpio.c5
-rw-r--r--hw/arm/pxa2xx_pic.c5
-rw-r--r--hw/arm/raspi.c10
-rw-r--r--hw/arm/realview.c22
-rw-r--r--hw/arm/sabrelite.c6
-rw-r--r--hw/arm/sbsa-ref.c26
-rw-r--r--hw/arm/spitz.c4
-rw-r--r--hw/arm/stellaris.c12
-rw-r--r--hw/arm/stm32f205_soc.c34
-rw-r--r--hw/arm/stm32f405_soc.c66
-rw-r--r--hw/arm/strongarm.c9
-rw-r--r--hw/arm/versatilepb.c18
-rw-r--r--hw/arm/vexpress.c18
-rw-r--r--hw/arm/virt.c38
-rw-r--r--hw/arm/xilinx_zynq.c44
-rw-r--r--hw/arm/xlnx-versal-virt.c15
-rw-r--r--hw/arm/xlnx-versal.c53
-rw-r--r--hw/arm/xlnx-zcu102.c26
-rw-r--r--hw/arm/xlnx-zynqmp.c92
59 files changed, 898 insertions, 1149 deletions
diff --git a/hw/arm/allwinner-a10.c b/hw/arm/allwinner-a10.c
index 6e1329a4a2..52e0d83760 100644
--- a/hw/arm/allwinner-a10.c
+++ b/hw/arm/allwinner-a10.c
@@ -41,37 +41,31 @@ static void aw_a10_init(Object *obj)
 {
     AwA10State *s = AW_A10(obj);
 
-    object_initialize_child(obj, "cpu", &s->cpu, sizeof(s->cpu),
-                            ARM_CPU_TYPE_NAME("cortex-a8"),
-                            &error_abort, NULL);
+    object_initialize_child(obj, "cpu", &s->cpu,
+                            ARM_CPU_TYPE_NAME("cortex-a8"));
 
-    sysbus_init_child_obj(obj, "intc", &s->intc, sizeof(s->intc),
-                          TYPE_AW_A10_PIC);
+    object_initialize_child(obj, "intc", &s->intc, TYPE_AW_A10_PIC);
 
-    sysbus_init_child_obj(obj, "timer", &s->timer, sizeof(s->timer),
-                          TYPE_AW_A10_PIT);
+    object_initialize_child(obj, "timer", &s->timer, TYPE_AW_A10_PIT);
 
-    sysbus_init_child_obj(obj, "emac", &s->emac, sizeof(s->emac), TYPE_AW_EMAC);
+    object_initialize_child(obj, "emac", &s->emac, TYPE_AW_EMAC);
 
-    sysbus_init_child_obj(obj, "sata", &s->sata, sizeof(s->sata),
-                          TYPE_ALLWINNER_AHCI);
+    object_initialize_child(obj, "sata", &s->sata, TYPE_ALLWINNER_AHCI);
 
     if (machine_usb(current_machine)) {
         int i;
 
         for (i = 0; i < AW_A10_NUM_USB; i++) {
-            sysbus_init_child_obj(obj, "ehci[*]", OBJECT(&s->ehci[i]),
-                                  sizeof(s->ehci[i]), TYPE_PLATFORM_EHCI);
-            sysbus_init_child_obj(obj, "ohci[*]", OBJECT(&s->ohci[i]),
-                                  sizeof(s->ohci[i]), TYPE_SYSBUS_OHCI);
+            object_initialize_child(obj, "ehci[*]", &s->ehci[i],
+                                    TYPE_PLATFORM_EHCI);
+            object_initialize_child(obj, "ohci[*]", &s->ohci[i],
+                                    TYPE_SYSBUS_OHCI);
         }
     }
 
-    sysbus_init_child_obj(obj, "mmc0", &s->mmc0, sizeof(s->mmc0),
-                          TYPE_AW_SDHOST_SUN4I);
+    object_initialize_child(obj, "mmc0", &s->mmc0, TYPE_AW_SDHOST_SUN4I);
 
-    sysbus_init_child_obj(obj, "rtc", &s->rtc, sizeof(s->rtc),
-                          TYPE_AW_RTC_SUN4I);
+    object_initialize_child(obj, "rtc", &s->rtc, TYPE_AW_RTC_SUN4I);
 }
 
 static void aw_a10_realize(DeviceState *dev, Error **errp)
@@ -80,13 +74,13 @@ static void aw_a10_realize(DeviceState *dev, Error **errp)
     SysBusDevice *sysbusdev;
     Error *err = NULL;
 
-    object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);
+    qdev_realize(DEVICE(&s->cpu), NULL, &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
     }
 
-    object_property_set_bool(OBJECT(&s->intc), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->intc), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -99,7 +93,7 @@ static void aw_a10_realize(DeviceState *dev, Error **errp)
                        qdev_get_gpio_in(DEVICE(&s->cpu), ARM_CPU_FIQ));
     qdev_pass_gpios(DEVICE(&s->intc), dev, NULL);
 
-    object_property_set_bool(OBJECT(&s->timer), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->timer), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -123,7 +117,7 @@ static void aw_a10_realize(DeviceState *dev, Error **errp)
         qemu_check_nic_model(&nd_table[0], TYPE_AW_EMAC);
         qdev_set_nic_properties(DEVICE(&s->emac), &nd_table[0]);
     }
-    object_property_set_bool(OBJECT(&s->emac), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->emac), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -132,7 +126,7 @@ static void aw_a10_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(sysbusdev, 0, AW_A10_EMAC_BASE);
     sysbus_connect_irq(sysbusdev, 0, qdev_get_gpio_in(dev, 55));
 
-    object_property_set_bool(OBJECT(&s->sata), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->sata), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -155,8 +149,7 @@ static void aw_a10_realize(DeviceState *dev, Error **errp)
 
             object_property_set_bool(OBJECT(&s->ehci[i]), true,
                                      "companion-enable", &error_fatal);
-            object_property_set_bool(OBJECT(&s->ehci[i]), true, "realized",
-                                     &error_fatal);
+            sysbus_realize(SYS_BUS_DEVICE(&s->ehci[i]), &error_fatal);
             sysbus_mmio_map(SYS_BUS_DEVICE(&s->ehci[i]), 0,
                             AW_A10_EHCI_BASE + i * 0x8000);
             sysbus_connect_irq(SYS_BUS_DEVICE(&s->ehci[i]), 0,
@@ -164,8 +157,7 @@ static void aw_a10_realize(DeviceState *dev, Error **errp)
 
             object_property_set_str(OBJECT(&s->ohci[i]), bus, "masterbus",
                                     &error_fatal);
-            object_property_set_bool(OBJECT(&s->ohci[i]), true, "realized",
-                                     &error_fatal);
+            sysbus_realize(SYS_BUS_DEVICE(&s->ohci[i]), &error_fatal);
             sysbus_mmio_map(SYS_BUS_DEVICE(&s->ohci[i]), 0,
                             AW_A10_OHCI_BASE + i * 0x8000);
             sysbus_connect_irq(SYS_BUS_DEVICE(&s->ohci[i]), 0,
@@ -174,14 +166,14 @@ static void aw_a10_realize(DeviceState *dev, Error **errp)
     }
 
     /* SD/MMC */
-    qdev_init_nofail(DEVICE(&s->mmc0));
+    sysbus_realize(SYS_BUS_DEVICE(&s->mmc0), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->mmc0), 0, AW_A10_MMC0_BASE);
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->mmc0), 0, qdev_get_gpio_in(dev, 32));
     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->mmc0),
                               "sd-bus");
 
     /* RTC */
-    qdev_init_nofail(DEVICE(&s->rtc));
+    sysbus_realize(SYS_BUS_DEVICE(&s->rtc), &error_fatal);
     sysbus_mmio_map_overlap(SYS_BUS_DEVICE(&s->rtc), 0, AW_A10_RTC_BASE, 10);
 }
 
diff --git a/hw/arm/allwinner-h3.c b/hw/arm/allwinner-h3.c
index f10674da5a..8e09468e86 100644
--- a/hw/arm/allwinner-h3.c
+++ b/hw/arm/allwinner-h3.c
@@ -194,50 +194,39 @@ static void allwinner_h3_init(Object *obj)
     s->memmap = allwinner_h3_memmap;
 
     for (int i = 0; i < AW_H3_NUM_CPUS; i++) {
-        object_initialize_child(obj, "cpu[*]", &s->cpus[i], sizeof(s->cpus[i]),
-                                ARM_CPU_TYPE_NAME("cortex-a7"),
-                                &error_abort, NULL);
+        object_initialize_child(obj, "cpu[*]", &s->cpus[i],
+                                ARM_CPU_TYPE_NAME("cortex-a7"));
     }
 
-    sysbus_init_child_obj(obj, "gic", &s->gic, sizeof(s->gic),
-                          TYPE_ARM_GIC);
+    object_initialize_child(obj, "gic", &s->gic, TYPE_ARM_GIC);
 
-    sysbus_init_child_obj(obj, "timer", &s->timer, sizeof(s->timer),
-                          TYPE_AW_A10_PIT);
+    object_initialize_child(obj, "timer", &s->timer, TYPE_AW_A10_PIT);
     object_property_add_alias(obj, "clk0-freq", OBJECT(&s->timer),
                               "clk0-freq");
     object_property_add_alias(obj, "clk1-freq", OBJECT(&s->timer),
                               "clk1-freq");
 
-    sysbus_init_child_obj(obj, "ccu", &s->ccu, sizeof(s->ccu),
-                          TYPE_AW_H3_CCU);
+    object_initialize_child(obj, "ccu", &s->ccu, TYPE_AW_H3_CCU);
 
-    sysbus_init_child_obj(obj, "sysctrl", &s->sysctrl, sizeof(s->sysctrl),
-                          TYPE_AW_H3_SYSCTRL);
+    object_initialize_child(obj, "sysctrl", &s->sysctrl, TYPE_AW_H3_SYSCTRL);
 
-    sysbus_init_child_obj(obj, "cpucfg", &s->cpucfg, sizeof(s->cpucfg),
-                          TYPE_AW_CPUCFG);
+    object_initialize_child(obj, "cpucfg", &s->cpucfg, TYPE_AW_CPUCFG);
 
-    sysbus_init_child_obj(obj, "sid", &s->sid, sizeof(s->sid),
-                          TYPE_AW_SID);
+    object_initialize_child(obj, "sid", &s->sid, TYPE_AW_SID);
     object_property_add_alias(obj, "identifier", OBJECT(&s->sid),
                               "identifier");
 
-    sysbus_init_child_obj(obj, "mmc0", &s->mmc0, sizeof(s->mmc0),
-                          TYPE_AW_SDHOST_SUN5I);
+    object_initialize_child(obj, "mmc0", &s->mmc0, TYPE_AW_SDHOST_SUN5I);
 
-    sysbus_init_child_obj(obj, "emac", &s->emac, sizeof(s->emac),
-                          TYPE_AW_SUN8I_EMAC);
+    object_initialize_child(obj, "emac", &s->emac, TYPE_AW_SUN8I_EMAC);
 
-    sysbus_init_child_obj(obj, "dramc", &s->dramc, sizeof(s->dramc),
-                          TYPE_AW_H3_DRAMC);
+    object_initialize_child(obj, "dramc", &s->dramc, TYPE_AW_H3_DRAMC);
     object_property_add_alias(obj, "ram-addr", OBJECT(&s->dramc),
                              "ram-addr");
     object_property_add_alias(obj, "ram-size", OBJECT(&s->dramc),
                               "ram-size");
 
-    sysbus_init_child_obj(obj, "rtc", &s->rtc, sizeof(s->rtc),
-                          TYPE_AW_RTC_SUN6I);
+    object_initialize_child(obj, "rtc", &s->rtc, TYPE_AW_RTC_SUN6I);
 }
 
 static void allwinner_h3_realize(DeviceState *dev, Error **errp)
@@ -261,7 +250,7 @@ static void allwinner_h3_realize(DeviceState *dev, Error **errp)
         qdev_prop_set_bit(DEVICE(&s->cpus[i]), "has_el2", true);
 
         /* Mark realized */
-        qdev_init_nofail(DEVICE(&s->cpus[i]));
+        qdev_realize(DEVICE(&s->cpus[i]), NULL, &error_fatal);
     }
 
     /* Generic Interrupt Controller */
@@ -271,7 +260,7 @@ static void allwinner_h3_realize(DeviceState *dev, Error **errp)
     qdev_prop_set_uint32(DEVICE(&s->gic), "num-cpu", AW_H3_NUM_CPUS);
     qdev_prop_set_bit(DEVICE(&s->gic), "has-security-extensions", false);
     qdev_prop_set_bit(DEVICE(&s->gic), "has-virtualization-extensions", true);
-    qdev_init_nofail(DEVICE(&s->gic));
+    sysbus_realize(SYS_BUS_DEVICE(&s->gic), &error_fatal);
 
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->gic), 0, s->memmap[AW_H3_GIC_DIST]);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->gic), 1, s->memmap[AW_H3_GIC_CPU]);
@@ -322,7 +311,7 @@ static void allwinner_h3_realize(DeviceState *dev, Error **errp)
     }
 
     /* Timer */
-    qdev_init_nofail(DEVICE(&s->timer));
+    sysbus_realize(SYS_BUS_DEVICE(&s->timer), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->timer), 0, s->memmap[AW_H3_PIT]);
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->timer), 0,
                        qdev_get_gpio_in(DEVICE(&s->gic), AW_H3_GIC_SPI_TIMER0));
@@ -344,23 +333,23 @@ static void allwinner_h3_realize(DeviceState *dev, Error **errp)
                                 &s->sram_c);
 
     /* Clock Control Unit */
-    qdev_init_nofail(DEVICE(&s->ccu));
+    sysbus_realize(SYS_BUS_DEVICE(&s->ccu), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->ccu), 0, s->memmap[AW_H3_CCU]);
 
     /* System Control */
-    qdev_init_nofail(DEVICE(&s->sysctrl));
+    sysbus_realize(SYS_BUS_DEVICE(&s->sysctrl), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->sysctrl), 0, s->memmap[AW_H3_SYSCTRL]);
 
     /* CPU Configuration */
-    qdev_init_nofail(DEVICE(&s->cpucfg));
+    sysbus_realize(SYS_BUS_DEVICE(&s->cpucfg), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->cpucfg), 0, s->memmap[AW_H3_CPUCFG]);
 
     /* Security Identifier */
-    qdev_init_nofail(DEVICE(&s->sid));
+    sysbus_realize(SYS_BUS_DEVICE(&s->sid), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->sid), 0, s->memmap[AW_H3_SID]);
 
     /* SD/MMC */
-    qdev_init_nofail(DEVICE(&s->mmc0));
+    sysbus_realize(SYS_BUS_DEVICE(&s->mmc0), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->mmc0), 0, s->memmap[AW_H3_MMC0]);
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->mmc0), 0,
                        qdev_get_gpio_in(DEVICE(&s->gic), AW_H3_GIC_SPI_MMC0));
@@ -373,7 +362,7 @@ static void allwinner_h3_realize(DeviceState *dev, Error **errp)
         qemu_check_nic_model(&nd_table[0], TYPE_AW_SUN8I_EMAC);
         qdev_set_nic_properties(DEVICE(&s->emac), &nd_table[0]);
     }
-    qdev_init_nofail(DEVICE(&s->emac));
+    sysbus_realize(SYS_BUS_DEVICE(&s->emac), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->emac), 0, s->memmap[AW_H3_EMAC]);
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->emac), 0,
                        qdev_get_gpio_in(DEVICE(&s->gic), AW_H3_GIC_SPI_EMAC));
@@ -423,13 +412,13 @@ static void allwinner_h3_realize(DeviceState *dev, Error **errp)
                    115200, serial_hd(3), DEVICE_NATIVE_ENDIAN);
 
     /* DRAMC */
-    qdev_init_nofail(DEVICE(&s->dramc));
+    sysbus_realize(SYS_BUS_DEVICE(&s->dramc), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->dramc), 0, s->memmap[AW_H3_DRAMCOM]);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->dramc), 1, s->memmap[AW_H3_DRAMCTL]);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->dramc), 2, s->memmap[AW_H3_DRAMPHY]);
 
     /* RTC */
-    qdev_init_nofail(DEVICE(&s->rtc));
+    sysbus_realize(SYS_BUS_DEVICE(&s->rtc), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->rtc), 0, s->memmap[AW_H3_RTC]);
 
     /* Unimplemented devices */
diff --git a/hw/arm/armsse.c b/hw/arm/armsse.c
index 174ca7effc..9ddde339ec 100644
--- a/hw/arm/armsse.c
+++ b/hw/arm/armsse.c
@@ -251,15 +251,13 @@ static void armsse_init(Object *obj)
         char *name;
 
         name = g_strdup_printf("cluster%d", i);
-        object_initialize_child(obj, name, &s->cluster[i],
-                                sizeof(s->cluster[i]), TYPE_CPU_CLUSTER,
-                                &error_abort, NULL);
+        object_initialize_child(obj, name, &s->cluster[i], TYPE_CPU_CLUSTER);
         qdev_prop_set_uint32(DEVICE(&s->cluster[i]), "cluster-id", i);
         g_free(name);
 
         name = g_strdup_printf("armv7m%d", i);
-        sysbus_init_child_obj(OBJECT(&s->cluster[i]), name,
-                              &s->armv7m[i], sizeof(s->armv7m), TYPE_ARMV7M);
+        object_initialize_child(OBJECT(&s->cluster[i]), name, &s->armv7m[i],
+                                TYPE_ARMV7M);
         qdev_prop_set_string(DEVICE(&s->armv7m[i]), "cpu-type",
                              ARM_CPU_TYPE_NAME("cortex-m33"));
         g_free(name);
@@ -274,74 +272,61 @@ static void armsse_init(Object *obj)
         }
     }
 
-    sysbus_init_child_obj(obj, "secctl", &s->secctl, sizeof(s->secctl),
-                          TYPE_IOTKIT_SECCTL);
-    sysbus_init_child_obj(obj, "apb-ppc0", &s->apb_ppc0, sizeof(s->apb_ppc0),
-                          TYPE_TZ_PPC);
-    sysbus_init_child_obj(obj, "apb-ppc1", &s->apb_ppc1, sizeof(s->apb_ppc1),
-                          TYPE_TZ_PPC);
+    object_initialize_child(obj, "secctl", &s->secctl, TYPE_IOTKIT_SECCTL);
+    object_initialize_child(obj, "apb-ppc0", &s->apb_ppc0, TYPE_TZ_PPC);
+    object_initialize_child(obj, "apb-ppc1", &s->apb_ppc1, TYPE_TZ_PPC);
     for (i = 0; i < info->sram_banks; i++) {
         char *name = g_strdup_printf("mpc%d", i);
-        sysbus_init_child_obj(obj, name, &s->mpc[i],
-                              sizeof(s->mpc[i]), TYPE_TZ_MPC);
+        object_initialize_child(obj, name, &s->mpc[i], TYPE_TZ_MPC);
         g_free(name);
     }
     object_initialize_child(obj, "mpc-irq-orgate", &s->mpc_irq_orgate,
-                            sizeof(s->mpc_irq_orgate), TYPE_OR_IRQ,
-                            &error_abort, NULL);
+                            TYPE_OR_IRQ);
 
     for (i = 0; i < IOTS_NUM_EXP_MPC + info->sram_banks; i++) {
         char *name = g_strdup_printf("mpc-irq-splitter-%d", i);
         SplitIRQ *splitter = &s->mpc_irq_splitter[i];
 
-        object_initialize_child(obj, name, splitter, sizeof(*splitter),
-                                TYPE_SPLIT_IRQ, &error_abort, NULL);
+        object_initialize_child(obj, name, splitter, TYPE_SPLIT_IRQ);
         g_free(name);
     }
-    sysbus_init_child_obj(obj, "timer0", &s->timer0, sizeof(s->timer0),
-                          TYPE_CMSDK_APB_TIMER);
-    sysbus_init_child_obj(obj, "timer1", &s->timer1, sizeof(s->timer1),
-                          TYPE_CMSDK_APB_TIMER);
-    sysbus_init_child_obj(obj, "s32ktimer", &s->s32ktimer, sizeof(s->s32ktimer),
-                          TYPE_CMSDK_APB_TIMER);
-    sysbus_init_child_obj(obj, "dualtimer", &s->dualtimer, sizeof(s->dualtimer),
-                          TYPE_CMSDK_APB_DUALTIMER);
-    sysbus_init_child_obj(obj, "s32kwatchdog", &s->s32kwatchdog,
-                          sizeof(s->s32kwatchdog), TYPE_CMSDK_APB_WATCHDOG);
-    sysbus_init_child_obj(obj, "nswatchdog", &s->nswatchdog,
-                          sizeof(s->nswatchdog), TYPE_CMSDK_APB_WATCHDOG);
-    sysbus_init_child_obj(obj, "swatchdog", &s->swatchdog,
-                          sizeof(s->swatchdog), TYPE_CMSDK_APB_WATCHDOG);
-    sysbus_init_child_obj(obj, "armsse-sysctl", &s->sysctl,
-                          sizeof(s->sysctl), TYPE_IOTKIT_SYSCTL);
-    sysbus_init_child_obj(obj, "armsse-sysinfo", &s->sysinfo,
-                          sizeof(s->sysinfo), TYPE_IOTKIT_SYSINFO);
+    object_initialize_child(obj, "timer0", &s->timer0, TYPE_CMSDK_APB_TIMER);
+    object_initialize_child(obj, "timer1", &s->timer1, TYPE_CMSDK_APB_TIMER);
+    object_initialize_child(obj, "s32ktimer", &s->s32ktimer,
+                            TYPE_CMSDK_APB_TIMER);
+    object_initialize_child(obj, "dualtimer", &s->dualtimer,
+                            TYPE_CMSDK_APB_DUALTIMER);
+    object_initialize_child(obj, "s32kwatchdog", &s->s32kwatchdog,
+                            TYPE_CMSDK_APB_WATCHDOG);
+    object_initialize_child(obj, "nswatchdog", &s->nswatchdog,
+                            TYPE_CMSDK_APB_WATCHDOG);
+    object_initialize_child(obj, "swatchdog", &s->swatchdog,
+                            TYPE_CMSDK_APB_WATCHDOG);
+    object_initialize_child(obj, "armsse-sysctl", &s->sysctl,
+                            TYPE_IOTKIT_SYSCTL);
+    object_initialize_child(obj, "armsse-sysinfo", &s->sysinfo,
+                            TYPE_IOTKIT_SYSINFO);
     if (info->has_mhus) {
-        sysbus_init_child_obj(obj, "mhu0", &s->mhu[0], sizeof(s->mhu[0]),
-                              TYPE_ARMSSE_MHU);
-        sysbus_init_child_obj(obj, "mhu1", &s->mhu[1], sizeof(s->mhu[1]),
-                              TYPE_ARMSSE_MHU);
+        object_initialize_child(obj, "mhu0", &s->mhu[0], TYPE_ARMSSE_MHU);
+        object_initialize_child(obj, "mhu1", &s->mhu[1], TYPE_ARMSSE_MHU);
     }
     if (info->has_ppus) {
         for (i = 0; i < info->num_cpus; i++) {
             char *name = g_strdup_printf("CPU%dCORE_PPU", i);
             int ppuidx = CPU0CORE_PPU + i;
 
-            sysbus_init_child_obj(obj, name, &s->ppu[ppuidx],
-                                  sizeof(s->ppu[ppuidx]),
-                                  TYPE_UNIMPLEMENTED_DEVICE);
+            object_initialize_child(obj, name, &s->ppu[ppuidx],
+                                    TYPE_UNIMPLEMENTED_DEVICE);
             g_free(name);
         }
-        sysbus_init_child_obj(obj, "DBG_PPU", &s->ppu[DBG_PPU],
-                              sizeof(s->ppu[DBG_PPU]),
-                              TYPE_UNIMPLEMENTED_DEVICE);
+        object_initialize_child(obj, "DBG_PPU", &s->ppu[DBG_PPU],
+                                TYPE_UNIMPLEMENTED_DEVICE);
         for (i = 0; i < info->sram_banks; i++) {
             char *name = g_strdup_printf("RAM%d_PPU", i);
             int ppuidx = RAM0_PPU + i;
 
-            sysbus_init_child_obj(obj, name, &s->ppu[ppuidx],
-                                  sizeof(s->ppu[ppuidx]),
-                                  TYPE_UNIMPLEMENTED_DEVICE);
+            object_initialize_child(obj, name, &s->ppu[ppuidx],
+                                    TYPE_UNIMPLEMENTED_DEVICE);
             g_free(name);
         }
     }
@@ -349,9 +334,8 @@ static void armsse_init(Object *obj)
         for (i = 0; i < info->num_cpus; i++) {
             char *name = g_strdup_printf("cachectrl%d", i);
 
-            sysbus_init_child_obj(obj, name, &s->cachectrl[i],
-                                  sizeof(s->cachectrl[i]),
-                                  TYPE_UNIMPLEMENTED_DEVICE);
+            object_initialize_child(obj, name, &s->cachectrl[i],
+                                    TYPE_UNIMPLEMENTED_DEVICE);
             g_free(name);
         }
     }
@@ -359,9 +343,8 @@ static void armsse_init(Object *obj)
         for (i = 0; i < info->num_cpus; i++) {
             char *name = g_strdup_printf("cpusecctrl%d", i);
 
-            sysbus_init_child_obj(obj, name, &s->cpusecctrl[i],
-                                  sizeof(s->cpusecctrl[i]),
-                                  TYPE_UNIMPLEMENTED_DEVICE);
+            object_initialize_child(obj, name, &s->cpusecctrl[i],
+                                    TYPE_UNIMPLEMENTED_DEVICE);
             g_free(name);
         }
     }
@@ -369,27 +352,21 @@ static void armsse_init(Object *obj)
         for (i = 0; i < info->num_cpus; i++) {
             char *name = g_strdup_printf("cpuid%d", i);
 
-            sysbus_init_child_obj(obj, name, &s->cpuid[i],
-                                  sizeof(s->cpuid[i]),
-                                  TYPE_ARMSSE_CPUID);
+            object_initialize_child(obj, name, &s->cpuid[i],
+                                    TYPE_ARMSSE_CPUID);
             g_free(name);
         }
     }
-    object_initialize_child(obj, "nmi-orgate", &s->nmi_orgate,
-                            sizeof(s->nmi_orgate), TYPE_OR_IRQ,
-                            &error_abort, NULL);
+    object_initialize_child(obj, "nmi-orgate", &s->nmi_orgate, TYPE_OR_IRQ);
     object_initialize_child(obj, "ppc-irq-orgate", &s->ppc_irq_orgate,
-                            sizeof(s->ppc_irq_orgate), TYPE_OR_IRQ,
-                            &error_abort, NULL);
+                            TYPE_OR_IRQ);
     object_initialize_child(obj, "sec-resp-splitter", &s->sec_resp_splitter,
-                            sizeof(s->sec_resp_splitter), TYPE_SPLIT_IRQ,
-                            &error_abort, NULL);
+                            TYPE_SPLIT_IRQ);
     for (i = 0; i < ARRAY_SIZE(s->ppc_irq_splitter); i++) {
         char *name = g_strdup_printf("ppc-irq-splitter-%d", i);
         SplitIRQ *splitter = &s->ppc_irq_splitter[i];
 
-        object_initialize_child(obj, name, splitter, sizeof(*splitter),
-                                TYPE_SPLIT_IRQ, &error_abort, NULL);
+        object_initialize_child(obj, name, splitter, TYPE_SPLIT_IRQ);
         g_free(name);
     }
     if (info->num_cpus > 1) {
@@ -398,8 +375,7 @@ static void armsse_init(Object *obj)
                 char *name = g_strdup_printf("cpu-irq-splitter%d", i);
                 SplitIRQ *splitter = &s->cpu_irq_splitter[i];
 
-                object_initialize_child(obj, name, splitter, sizeof(*splitter),
-                                        TYPE_SPLIT_IRQ, &error_abort, NULL);
+                object_initialize_child(obj, name, splitter, TYPE_SPLIT_IRQ);
                 g_free(name);
             }
         }
@@ -446,7 +422,7 @@ static void map_ppu(ARMSSE *s, int ppuidx, const char *name, hwaddr addr)
 
     qdev_prop_set_string(dev, "name", name);
     qdev_prop_set_uint64(dev, "size", 0x1000);
-    qdev_init_nofail(dev);
+    sysbus_realize(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->ppu[ppuidx]), 0, addr);
 }
 
@@ -597,7 +573,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
             error_propagate(errp, err);
             return;
         }
-        object_property_set_bool(cpuobj, true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(cpuobj), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -608,8 +584,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
          * CPU must exist and have been parented into the cluster before
          * the cluster is realized.
          */
-        object_property_set_bool(OBJECT(&s->cluster[i]),
-                                 true, "realized", &err);
+        qdev_realize(DEVICE(&s->cluster[i]), NULL, &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -645,7 +620,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
                     error_propagate(errp, err);
                     return;
                 }
-                object_property_set_bool(splitter, true, "realized", &err);
+                qdev_realize(DEVICE(splitter), NULL, &err);
                 if (err) {
                     error_propagate(errp, err);
                     return;
@@ -678,7 +653,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
     }
 
     /* Security controller */
-    object_property_set_bool(OBJECT(&s->secctl), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->secctl), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -701,8 +676,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, err);
         return;
     }
-    object_property_set_bool(OBJECT(&s->sec_resp_splitter), true,
-                             "realized", &err);
+    qdev_realize(DEVICE(&s->sec_resp_splitter), NULL, &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -730,7 +704,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
             error_propagate(errp, err);
             return;
         }
-        object_property_set_bool(OBJECT(&s->mpc[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->mpc[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -753,8 +727,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, err);
         return;
     }
-    object_property_set_bool(OBJECT(&s->mpc_irq_orgate), true,
-                             "realized", &err);
+    qdev_realize(DEVICE(&s->mpc_irq_orgate), NULL, &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -773,7 +746,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
      * map its upstream ends to the right place in the container.
      */
     qdev_prop_set_uint32(DEVICE(&s->timer0), "pclk-frq", s->mainclk_frq);
-    object_property_set_bool(OBJECT(&s->timer0), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->timer0), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -788,7 +761,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
     }
 
     qdev_prop_set_uint32(DEVICE(&s->timer1), "pclk-frq", s->mainclk_frq);
-    object_property_set_bool(OBJECT(&s->timer1), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->timer1), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -804,7 +777,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
 
 
     qdev_prop_set_uint32(DEVICE(&s->dualtimer), "pclk-frq", s->mainclk_frq);
-    object_property_set_bool(OBJECT(&s->dualtimer), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->dualtimer), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -833,8 +806,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
             int cpunum;
             SysBusDevice *mhu_sbd = SYS_BUS_DEVICE(&s->mhu[i]);
 
-            object_property_set_bool(OBJECT(&s->mhu[i]), true,
-                                     "realized", &err);
+            sysbus_realize(SYS_BUS_DEVICE(&s->mhu[i]), &err);
             if (err) {
                 error_propagate(errp, err);
                 return;
@@ -865,7 +837,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
         }
     }
 
-    object_property_set_bool(OBJECT(&s->apb_ppc0), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->apb_ppc0), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -914,8 +886,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, err);
         return;
     }
-    object_property_set_bool(OBJECT(&s->ppc_irq_orgate), true,
-                             "realized", &err);
+    qdev_realize(DEVICE(&s->ppc_irq_orgate), NULL, &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -938,8 +909,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
             qdev_prop_set_string(DEVICE(&s->cachectrl[i]), "name", name);
             g_free(name);
             qdev_prop_set_uint64(DEVICE(&s->cachectrl[i]), "size", 0x1000);
-            object_property_set_bool(OBJECT(&s->cachectrl[i]), true,
-                                     "realized", &err);
+            sysbus_realize(SYS_BUS_DEVICE(&s->cachectrl[i]), &err);
             if (err) {
                 error_propagate(errp, err);
                 return;
@@ -957,8 +927,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
             qdev_prop_set_string(DEVICE(&s->cpusecctrl[i]), "name", name);
             g_free(name);
             qdev_prop_set_uint64(DEVICE(&s->cpusecctrl[i]), "size", 0x1000);
-            object_property_set_bool(OBJECT(&s->cpusecctrl[i]), true,
-                                     "realized", &err);
+            sysbus_realize(SYS_BUS_DEVICE(&s->cpusecctrl[i]), &err);
             if (err) {
                 error_propagate(errp, err);
                 return;
@@ -973,8 +942,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
             MemoryRegion *mr;
 
             qdev_prop_set_uint32(DEVICE(&s->cpuid[i]), "CPUID", i);
-            object_property_set_bool(OBJECT(&s->cpuid[i]), true,
-                                     "realized", &err);
+            sysbus_realize(SYS_BUS_DEVICE(&s->cpuid[i]), &err);
             if (err) {
                 error_propagate(errp, err);
                 return;
@@ -990,7 +958,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
      *   0x4002f000: S32K timer
      */
     qdev_prop_set_uint32(DEVICE(&s->s32ktimer), "pclk-frq", S32KCLK);
-    object_property_set_bool(OBJECT(&s->s32ktimer), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->s32ktimer), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -1004,7 +972,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    object_property_set_bool(OBJECT(&s->apb_ppc1), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->apb_ppc1), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -1042,7 +1010,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, err);
         return;
     }
-    object_property_set_bool(OBJECT(&s->sysinfo), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->sysinfo), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -1058,7 +1026,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
                             "INITSVTOR0_RST", &err);
     object_property_set_int(OBJECT(&s->sysctl), s->init_svtor,
                             "INITSVTOR1_RST", &err);
-    object_property_set_bool(OBJECT(&s->sysctl), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->sysctl), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -1093,7 +1061,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, err);
         return;
     }
-    object_property_set_bool(OBJECT(&s->nmi_orgate), true, "realized", &err);
+    qdev_realize(DEVICE(&s->nmi_orgate), NULL, &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -1102,7 +1070,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
                           qdev_get_gpio_in_named(DEVICE(&s->armv7m), "NMI", 0));
 
     qdev_prop_set_uint32(DEVICE(&s->s32kwatchdog), "wdogclk-frq", S32KCLK);
-    object_property_set_bool(OBJECT(&s->s32kwatchdog), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->s32kwatchdog), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -1114,7 +1082,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
     /* 0x40080000 .. 0x4008ffff : ARMSSE second Base peripheral region */
 
     qdev_prop_set_uint32(DEVICE(&s->nswatchdog), "wdogclk-frq", s->mainclk_frq);
-    object_property_set_bool(OBJECT(&s->nswatchdog), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->nswatchdog), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -1124,7 +1092,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->nswatchdog), 0, 0x40081000);
 
     qdev_prop_set_uint32(DEVICE(&s->swatchdog), "wdogclk-frq", s->mainclk_frq);
-    object_property_set_bool(OBJECT(&s->swatchdog), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->swatchdog), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -1141,7 +1109,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
             error_propagate(errp, err);
             return;
         }
-        object_property_set_bool(splitter, true, "realized", &err);
+        qdev_realize(DEVICE(splitter), NULL, &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -1188,7 +1156,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
             error_propagate(errp, err);
             return;
         }
-        object_property_set_bool(OBJECT(splitter), true, "realized", &err);
+        qdev_realize(DEVICE(splitter), NULL, &err);
         if (err) {
             error_propagate(errp, err);
             return;
diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
index 7da57f56d3..ce83586e03 100644
--- a/hw/arm/armv7m.c
+++ b/hw/arm/armv7m.c
@@ -136,13 +136,13 @@ static void armv7m_instance_init(Object *obj)
 
     memory_region_init(&s->container, obj, "armv7m-container", UINT64_MAX);
 
-    sysbus_init_child_obj(obj, "nvnic", &s->nvic, sizeof(s->nvic), TYPE_NVIC);
+    object_initialize_child(obj, "nvnic", &s->nvic, TYPE_NVIC);
     object_property_add_alias(obj, "num-irq",
                               OBJECT(&s->nvic), "num-irq");
 
     for (i = 0; i < ARRAY_SIZE(s->bitband); i++) {
-        sysbus_init_child_obj(obj, "bitband[*]", &s->bitband[i],
-                              sizeof(s->bitband[i]), TYPE_BITBAND);
+        object_initialize_child(obj, "bitband[*]", &s->bitband[i],
+                                TYPE_BITBAND);
     }
 }
 
@@ -216,14 +216,14 @@ static void armv7m_realize(DeviceState *dev, Error **errp)
     s->cpu->env.nvic = &s->nvic;
     s->nvic.cpu = s->cpu;
 
-    object_property_set_bool(OBJECT(s->cpu), true, "realized", &err);
+    qdev_realize(DEVICE(s->cpu), NULL, &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
     }
 
     /* Note that we must realize the NVIC after the CPU */
-    object_property_set_bool(OBJECT(&s->nvic), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->nvic), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -245,8 +245,8 @@ static void armv7m_realize(DeviceState *dev, Error **errp)
     memory_region_add_subregion(&s->container, 0xe000e000,
                                 sysbus_mmio_get_region(sbd, 0));
 
-    if (s->enable_bitband) {
-        for (i = 0; i < ARRAY_SIZE(s->bitband); i++) {
+    for (i = 0; i < ARRAY_SIZE(s->bitband); i++) {
+        if (s->enable_bitband) {
             Object *obj = OBJECT(&s->bitband[i]);
             SysBusDevice *sbd = SYS_BUS_DEVICE(&s->bitband[i]);
 
@@ -257,7 +257,7 @@ static void armv7m_realize(DeviceState *dev, Error **errp)
             }
             object_property_set_link(obj, OBJECT(s->board_memory),
                                      "source-memory", &error_abort);
-            object_property_set_bool(obj, true, "realized", &err);
+            sysbus_realize(SYS_BUS_DEVICE(obj), &err);
             if (err != NULL) {
                 error_propagate(errp, err);
                 return;
@@ -265,6 +265,8 @@ static void armv7m_realize(DeviceState *dev, Error **errp)
 
             memory_region_add_subregion(&s->container, bitband_output_addr[i],
                                         sysbus_mmio_get_region(sbd, 0));
+        } else {
+            object_unparent(OBJECT(&s->bitband[i]));
         }
     }
 }
diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index 62344ac6a3..0ad08a2b4c 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -225,12 +225,12 @@ static void aspeed_board_init_flashes(AspeedSMCState *s, const char *flashtype,
         DriveInfo *dinfo = drive_get_next(IF_MTD);
         qemu_irq cs_line;
 
-        fl->flash = ssi_create_slave_no_init(s->spi, flashtype);
+        fl->flash = qdev_new(flashtype);
         if (dinfo) {
             qdev_prop_set_drive(fl->flash, "drive", blk_by_legacy_dinfo(dinfo),
                                 errp);
         }
-        qdev_init_nofail(fl->flash);
+        qdev_realize_and_unref(fl->flash, BUS(s->spi), &error_fatal);
 
         cs_line = qdev_get_gpio_in_named(fl->flash, SSI_GPIO_CS, 0);
         sysbus_connect_irq(SYS_BUS_DEVICE(s), i + 1, cs_line);
@@ -241,13 +241,14 @@ static void sdhci_attach_drive(SDHCIState *sdhci, DriveInfo *dinfo)
 {
         DeviceState *card;
 
-        card = qdev_create(qdev_get_child_bus(DEVICE(sdhci), "sd-bus"),
-                           TYPE_SD_CARD);
+        card = qdev_new(TYPE_SD_CARD);
         if (dinfo) {
             qdev_prop_set_drive(card, "drive", blk_by_legacy_dinfo(dinfo),
                                 &error_fatal);
         }
-        object_property_set_bool(OBJECT(card), true, "realized", &error_fatal);
+        qdev_realize_and_unref(card,
+                               qdev_get_child_bus(DEVICE(sdhci), "sd-bus"),
+                               &error_fatal);
 }
 
 static void aspeed_machine_init(MachineState *machine)
@@ -258,6 +259,7 @@ static void aspeed_machine_init(MachineState *machine)
     DriveInfo *drive0 = drive_get(IF_MTD, 0, 0);
     ram_addr_t max_ram_size;
     int i;
+    NICInfo *nd = &nd_table[0];
 
     bmc = g_new0(AspeedBoardState, 1);
 
@@ -265,9 +267,7 @@ static void aspeed_machine_init(MachineState *machine)
                        4 * GiB);
     memory_region_add_subregion(&bmc->ram_container, 0, machine->ram);
 
-    object_initialize_child(OBJECT(machine), "soc", &bmc->soc,
-                            (sizeof(bmc->soc)), amc->soc_name, &error_abort,
-                            NULL);
+    object_initialize_child(OBJECT(machine), "soc", &bmc->soc, amc->soc_name);
 
     sc = ASPEED_SOC_GET_CLASS(&bmc->soc);
 
@@ -277,14 +277,20 @@ static void aspeed_machine_init(MachineState *machine)
     object_property_set_uint(OBJECT(&bmc->soc), ram_size, "ram-size",
                              &error_fatal);
 
+    for (i = 0; i < sc->macs_num; i++) {
+        if ((amc->macs_mask & (1 << i)) && nd->used) {
+            qemu_check_nic_model(nd, TYPE_FTGMAC100);
+            qdev_set_nic_properties(DEVICE(&bmc->soc.ftgmac100[i]), nd);
+            nd++;
+        }
+    }
+
     object_property_set_int(OBJECT(&bmc->soc), amc->hw_strap1, "hw-strap1",
                             &error_abort);
     object_property_set_int(OBJECT(&bmc->soc), amc->hw_strap2, "hw-strap2",
                             &error_abort);
     object_property_set_int(OBJECT(&bmc->soc), amc->num_cs, "num-cs",
                             &error_abort);
-    object_property_set_int(OBJECT(&bmc->soc), machine->smp.cpus, "num-cpus",
-                            &error_abort);
     object_property_set_link(OBJECT(&bmc->soc), OBJECT(&bmc->ram_container),
                              "dram", &error_abort);
     if (machine->kernel_filename) {
@@ -296,8 +302,7 @@ static void aspeed_machine_init(MachineState *machine)
         object_property_set_int(OBJECT(&bmc->soc), ASPEED_SCU_PROT_KEY,
                                 "hw-prot-key", &error_abort);
     }
-    object_property_set_bool(OBJECT(&bmc->soc), true, "realized",
-                             &error_abort);
+    qdev_realize(DEVICE(&bmc->soc), NULL, &error_abort);
 
     memory_region_add_subregion(get_system_memory(),
                                 sc->memmap[ASPEED_SDRAM],
@@ -337,7 +342,7 @@ static void aspeed_machine_init(MachineState *machine)
         }
     }
 
-    if (machine->kernel_filename && bmc->soc.num_cpus > 1) {
+    if (machine->kernel_filename && sc->num_cpus > 1) {
         /* With no u-boot we must set up a boot stub for the secondary CPU */
         MemoryRegion *smpboot = g_new(MemoryRegion, 1);
         memory_region_init_ram(smpboot, OBJECT(bmc), "aspeed.smpboot",
@@ -352,7 +357,7 @@ static void aspeed_machine_init(MachineState *machine)
 
     aspeed_board_binfo.ram_size = ram_size;
     aspeed_board_binfo.loader_start = sc->memmap[ASPEED_SDRAM];
-    aspeed_board_binfo.nb_cpus = bmc->soc.num_cpus;
+    aspeed_board_binfo.nb_cpus = sc->num_cpus;
 
     if (amc->i2c_init) {
         amc->i2c_init(bmc);
@@ -549,16 +554,23 @@ static void aspeed_machine_class_props_init(ObjectClass *oc)
                            "boot directly from CE0 flash device");
 }
 
+static int aspeed_soc_num_cpus(const char *soc_name)
+{
+   AspeedSoCClass *sc = ASPEED_SOC_CLASS(object_class_by_name(soc_name));
+   return sc->num_cpus;
+}
+
 static void aspeed_machine_class_init(ObjectClass *oc, void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
+    AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
 
     mc->init = aspeed_machine_init;
-    mc->max_cpus = ASPEED_CPUS_NUM;
     mc->no_floppy = 1;
     mc->no_cdrom = 1;
     mc->no_parallel = 1;
     mc->default_ram_id = "ram";
+    amc->macs_mask = ASPEED_MAC0_ON;
 
     aspeed_machine_class_props_init(oc);
 }
@@ -576,6 +588,8 @@ static void aspeed_machine_palmetto_class_init(ObjectClass *oc, void *data)
     amc->num_cs    = 1;
     amc->i2c_init  = palmetto_bmc_i2c_init;
     mc->default_ram_size       = 256 * MiB;
+    mc->default_cpus = mc->min_cpus = mc->max_cpus =
+        aspeed_soc_num_cpus(amc->soc_name);
 };
 
 static void aspeed_machine_ast2500_evb_class_init(ObjectClass *oc, void *data)
@@ -591,6 +605,8 @@ static void aspeed_machine_ast2500_evb_class_init(ObjectClass *oc, void *data)
     amc->num_cs    = 1;
     amc->i2c_init  = ast2500_evb_i2c_init;
     mc->default_ram_size       = 512 * MiB;
+    mc->default_cpus = mc->min_cpus = mc->max_cpus =
+        aspeed_soc_num_cpus(amc->soc_name);
 };
 
 static void aspeed_machine_romulus_class_init(ObjectClass *oc, void *data)
@@ -606,6 +622,8 @@ static void aspeed_machine_romulus_class_init(ObjectClass *oc, void *data)
     amc->num_cs    = 2;
     amc->i2c_init  = romulus_bmc_i2c_init;
     mc->default_ram_size       = 512 * MiB;
+    mc->default_cpus = mc->min_cpus = mc->max_cpus =
+        aspeed_soc_num_cpus(amc->soc_name);
 };
 
 static void aspeed_machine_sonorapass_class_init(ObjectClass *oc, void *data)
@@ -621,6 +639,8 @@ static void aspeed_machine_sonorapass_class_init(ObjectClass *oc, void *data)
     amc->num_cs    = 2;
     amc->i2c_init  = sonorapass_bmc_i2c_init;
     mc->default_ram_size       = 512 * MiB;
+    mc->default_cpus = mc->min_cpus = mc->max_cpus =
+        aspeed_soc_num_cpus(amc->soc_name);
 };
 
 static void aspeed_machine_swift_class_init(ObjectClass *oc, void *data)
@@ -636,6 +656,8 @@ static void aspeed_machine_swift_class_init(ObjectClass *oc, void *data)
     amc->num_cs    = 2;
     amc->i2c_init  = swift_bmc_i2c_init;
     mc->default_ram_size       = 512 * MiB;
+    mc->default_cpus = mc->min_cpus = mc->max_cpus =
+        aspeed_soc_num_cpus(amc->soc_name);
 };
 
 static void aspeed_machine_witherspoon_class_init(ObjectClass *oc, void *data)
@@ -651,6 +673,8 @@ static void aspeed_machine_witherspoon_class_init(ObjectClass *oc, void *data)
     amc->num_cs    = 2;
     amc->i2c_init  = witherspoon_bmc_i2c_init;
     mc->default_ram_size = 512 * MiB;
+    mc->default_cpus = mc->min_cpus = mc->max_cpus =
+        aspeed_soc_num_cpus(amc->soc_name);
 };
 
 static void aspeed_machine_ast2600_evb_class_init(ObjectClass *oc, void *data)
@@ -665,8 +689,11 @@ static void aspeed_machine_ast2600_evb_class_init(ObjectClass *oc, void *data)
     amc->fmc_model = "w25q512jv";
     amc->spi_model = "mx66u51235f";
     amc->num_cs    = 1;
+    amc->macs_mask  = ASPEED_MAC1_ON | ASPEED_MAC2_ON | ASPEED_MAC3_ON;
     amc->i2c_init  = ast2600_evb_i2c_init;
     mc->default_ram_size = 1 * GiB;
+    mc->default_cpus = mc->min_cpus = mc->max_cpus =
+        aspeed_soc_num_cpus(amc->soc_name);
 };
 
 static void aspeed_machine_tacoma_class_init(ObjectClass *oc, void *data)
@@ -681,8 +708,11 @@ static void aspeed_machine_tacoma_class_init(ObjectClass *oc, void *data)
     amc->fmc_model = "mx66l1g45g";
     amc->spi_model = "mx66l1g45g";
     amc->num_cs    = 2;
+    amc->macs_mask  = ASPEED_MAC2_ON;
     amc->i2c_init  = witherspoon_bmc_i2c_init; /* Same board layout */
     mc->default_ram_size = 1 * GiB;
+    mc->default_cpus = mc->min_cpus = mc->max_cpus =
+        aspeed_soc_num_cpus(amc->soc_name);
 };
 
 static const TypeInfo aspeed_machine_types[] = {
diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
index 71a0acfe26..6da687299f 100644
--- a/hw/arm/aspeed_ast2600.c
+++ b/hw/arm/aspeed_ast2600.c
@@ -127,14 +127,11 @@ static void aspeed_soc_ast2600_init(Object *obj)
     }
 
     for (i = 0; i < sc->num_cpus; i++) {
-        object_initialize_child(obj, "cpu[*]", OBJECT(&s->cpu[i]),
-                                sizeof(s->cpu[i]), sc->cpu_type,
-                                &error_abort, NULL);
+        object_initialize_child(obj, "cpu[*]", &s->cpu[i], sc->cpu_type);
     }
 
     snprintf(typename, sizeof(typename), "aspeed.scu-%s", socname);
-    sysbus_init_child_obj(obj, "scu", OBJECT(&s->scu), sizeof(s->scu),
-                          typename);
+    object_initialize_child(obj, "scu", &s->scu, typename);
     qdev_prop_set_uint32(DEVICE(&s->scu), "silicon-rev",
                          sc->silicon_rev);
     object_property_add_alias(obj, "hw-strap1", OBJECT(&s->scu),
@@ -144,39 +141,33 @@ static void aspeed_soc_ast2600_init(Object *obj)
     object_property_add_alias(obj, "hw-prot-key", OBJECT(&s->scu),
                               "hw-prot-key");
 
-    sysbus_init_child_obj(obj, "a7mpcore", &s->a7mpcore,
-                          sizeof(s->a7mpcore), TYPE_A15MPCORE_PRIV);
+    object_initialize_child(obj, "a7mpcore", &s->a7mpcore,
+                            TYPE_A15MPCORE_PRIV);
 
-    sysbus_init_child_obj(obj, "rtc", OBJECT(&s->rtc), sizeof(s->rtc),
-                          TYPE_ASPEED_RTC);
+    object_initialize_child(obj, "rtc", &s->rtc, TYPE_ASPEED_RTC);
 
     snprintf(typename, sizeof(typename), "aspeed.timer-%s", socname);
-    sysbus_init_child_obj(obj, "timerctrl", OBJECT(&s->timerctrl),
-                          sizeof(s->timerctrl), typename);
+    object_initialize_child(obj, "timerctrl", &s->timerctrl, typename);
 
     snprintf(typename, sizeof(typename), "aspeed.i2c-%s", socname);
-    sysbus_init_child_obj(obj, "i2c", OBJECT(&s->i2c), sizeof(s->i2c),
-                          typename);
+    object_initialize_child(obj, "i2c", &s->i2c, typename);
 
     snprintf(typename, sizeof(typename), "aspeed.fmc-%s", socname);
-    sysbus_init_child_obj(obj, "fmc", OBJECT(&s->fmc), sizeof(s->fmc),
-                          typename);
+    object_initialize_child(obj, "fmc", &s->fmc, typename);
     object_property_add_alias(obj, "num-cs", OBJECT(&s->fmc), "num-cs");
 
     for (i = 0; i < sc->spis_num; i++) {
         snprintf(typename, sizeof(typename), "aspeed.spi%d-%s", i + 1, socname);
-        sysbus_init_child_obj(obj, "spi[*]", OBJECT(&s->spi[i]),
-                              sizeof(s->spi[i]), typename);
+        object_initialize_child(obj, "spi[*]", &s->spi[i], typename);
     }
 
     for (i = 0; i < sc->ehcis_num; i++) {
-        sysbus_init_child_obj(obj, "ehci[*]", OBJECT(&s->ehci[i]),
-                              sizeof(s->ehci[i]), TYPE_PLATFORM_EHCI);
+        object_initialize_child(obj, "ehci[*]", &s->ehci[i],
+                                TYPE_PLATFORM_EHCI);
     }
 
     snprintf(typename, sizeof(typename), "aspeed.sdmc-%s", socname);
-    sysbus_init_child_obj(obj, "sdmc", OBJECT(&s->sdmc), sizeof(s->sdmc),
-                          typename);
+    object_initialize_child(obj, "sdmc", &s->sdmc, typename);
     object_property_add_alias(obj, "ram-size", OBJECT(&s->sdmc),
                               "ram-size");
     object_property_add_alias(obj, "max-ram-size", OBJECT(&s->sdmc),
@@ -184,49 +175,42 @@ static void aspeed_soc_ast2600_init(Object *obj)
 
     for (i = 0; i < sc->wdts_num; i++) {
         snprintf(typename, sizeof(typename), "aspeed.wdt-%s", socname);
-        sysbus_init_child_obj(obj, "wdt[*]", OBJECT(&s->wdt[i]),
-                              sizeof(s->wdt[i]), typename);
+        object_initialize_child(obj, "wdt[*]", &s->wdt[i], typename);
     }
 
     for (i = 0; i < sc->macs_num; i++) {
-        sysbus_init_child_obj(obj, "ftgmac100[*]", OBJECT(&s->ftgmac100[i]),
-                              sizeof(s->ftgmac100[i]), TYPE_FTGMAC100);
+        object_initialize_child(obj, "ftgmac100[*]", &s->ftgmac100[i],
+                                TYPE_FTGMAC100);
 
-        sysbus_init_child_obj(obj, "mii[*]", &s->mii[i], sizeof(s->mii[i]),
-                              TYPE_ASPEED_MII);
+        object_initialize_child(obj, "mii[*]", &s->mii[i], TYPE_ASPEED_MII);
     }
 
-    sysbus_init_child_obj(obj, "xdma", OBJECT(&s->xdma), sizeof(s->xdma),
-                          TYPE_ASPEED_XDMA);
+    object_initialize_child(obj, "xdma", &s->xdma, TYPE_ASPEED_XDMA);
 
     snprintf(typename, sizeof(typename), "aspeed.gpio-%s", socname);
-    sysbus_init_child_obj(obj, "gpio", OBJECT(&s->gpio), sizeof(s->gpio),
-                          typename);
+    object_initialize_child(obj, "gpio", &s->gpio, typename);
 
     snprintf(typename, sizeof(typename), "aspeed.gpio-%s-1_8v", socname);
-    sysbus_init_child_obj(obj, "gpio_1_8v", OBJECT(&s->gpio_1_8v),
-                          sizeof(s->gpio_1_8v), typename);
+    object_initialize_child(obj, "gpio_1_8v", &s->gpio_1_8v, typename);
 
-    sysbus_init_child_obj(obj, "sd-controller", OBJECT(&s->sdhci),
-                          sizeof(s->sdhci), TYPE_ASPEED_SDHCI);
+    object_initialize_child(obj, "sd-controller", &s->sdhci,
+                            TYPE_ASPEED_SDHCI);
 
     object_property_set_int(OBJECT(&s->sdhci), 2, "num-slots", &error_abort);
 
     /* Init sd card slot class here so that they're under the correct parent */
     for (i = 0; i < ASPEED_SDHCI_NUM_SLOTS; ++i) {
-        sysbus_init_child_obj(obj, "sd-controller.sdhci[*]",
-                              OBJECT(&s->sdhci.slots[i]),
-                              sizeof(s->sdhci.slots[i]), TYPE_SYSBUS_SDHCI);
+        object_initialize_child(obj, "sd-controller.sdhci[*]",
+                                &s->sdhci.slots[i], TYPE_SYSBUS_SDHCI);
     }
 
-    sysbus_init_child_obj(obj, "emmc-controller", OBJECT(&s->emmc),
-                          sizeof(s->emmc), TYPE_ASPEED_SDHCI);
+    object_initialize_child(obj, "emmc-controller", &s->emmc,
+                            TYPE_ASPEED_SDHCI);
 
     object_property_set_int(OBJECT(&s->emmc), 1, "num-slots", &error_abort);
 
-    sysbus_init_child_obj(obj, "emmc-controller.sdhci",
-                          OBJECT(&s->emmc.slots[0]), sizeof(s->emmc.slots[0]),
-                          TYPE_SYSBUS_SDHCI);
+    object_initialize_child(obj, "emmc-controller.sdhci", &s->emmc.slots[0],
+                            TYPE_SYSBUS_SDHCI);
 }
 
 /*
@@ -255,17 +239,11 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     create_unimplemented_device("aspeed.video", sc->memmap[ASPEED_VIDEO],
                                 0x1000);
 
-    if (s->num_cpus > sc->num_cpus) {
-        warn_report("%s: invalid number of CPUs %d, using default %d",
-                    sc->name, s->num_cpus, sc->num_cpus);
-        s->num_cpus = sc->num_cpus;
-    }
-
     /* CPU */
-    for (i = 0; i < s->num_cpus; i++) {
+    for (i = 0; i < sc->num_cpus; i++) {
         object_property_set_int(OBJECT(&s->cpu[i]), QEMU_PSCI_CONDUIT_SMC,
                                 "psci-conduit", &error_abort);
-        if (s->num_cpus > 1) {
+        if (sc->num_cpus > 1) {
             object_property_set_int(OBJECT(&s->cpu[i]),
                                     ASPEED_A7MPCORE_ADDR,
                                     "reset-cbar", &error_abort);
@@ -281,7 +259,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
          * is needed when using -kernel
          */
 
-        object_property_set_bool(OBJECT(&s->cpu[i]), true, "realized", &err);
+        qdev_realize(DEVICE(&s->cpu[i]), NULL, &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -289,28 +267,27 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     }
 
     /* A7MPCORE */
-    object_property_set_int(OBJECT(&s->a7mpcore), s->num_cpus, "num-cpu",
+    object_property_set_int(OBJECT(&s->a7mpcore), sc->num_cpus, "num-cpu",
                             &error_abort);
     object_property_set_int(OBJECT(&s->a7mpcore),
                             ASPEED_SOC_AST2600_MAX_IRQ + GIC_INTERNAL,
                             "num-irq", &error_abort);
 
-    object_property_set_bool(OBJECT(&s->a7mpcore), true, "realized",
-                             &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->a7mpcore), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->a7mpcore), 0, ASPEED_A7MPCORE_ADDR);
 
-    for (i = 0; i < s->num_cpus; i++) {
+    for (i = 0; i < sc->num_cpus; i++) {
         SysBusDevice *sbd = SYS_BUS_DEVICE(&s->a7mpcore);
         DeviceState  *d   = DEVICE(qemu_get_cpu(i));
 
         irq = qdev_get_gpio_in(d, ARM_CPU_IRQ);
         sysbus_connect_irq(sbd, i, irq);
         irq = qdev_get_gpio_in(d, ARM_CPU_FIQ);
-        sysbus_connect_irq(sbd, i + s->num_cpus, irq);
+        sysbus_connect_irq(sbd, i + sc->num_cpus, irq);
         irq = qdev_get_gpio_in(d, ARM_CPU_VIRQ);
-        sysbus_connect_irq(sbd, i + 2 * s->num_cpus, irq);
+        sysbus_connect_irq(sbd, i + 2 * sc->num_cpus, irq);
         irq = qdev_get_gpio_in(d, ARM_CPU_VFIQ);
-        sysbus_connect_irq(sbd, i + 3 * s->num_cpus, irq);
+        sysbus_connect_irq(sbd, i + 3 * sc->num_cpus, irq);
     }
 
     /* SRAM */
@@ -324,7 +301,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
                                 sc->memmap[ASPEED_SRAM], &s->sram);
 
     /* SCU */
-    object_property_set_bool(OBJECT(&s->scu), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->scu), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -332,7 +309,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->scu), 0, sc->memmap[ASPEED_SCU]);
 
     /* RTC */
-    object_property_set_bool(OBJECT(&s->rtc), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->rtc), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -344,7 +321,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     /* Timer */
     object_property_set_link(OBJECT(&s->timerctrl),
                              OBJECT(&s->scu), "scu", &error_abort);
-    object_property_set_bool(OBJECT(&s->timerctrl), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->timerctrl), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -369,7 +346,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, err);
         return;
     }
-    object_property_set_bool(OBJECT(&s->i2c), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->i2c), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -397,7 +374,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, err);
         return;
     }
-    object_property_set_bool(OBJECT(&s->fmc), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->fmc), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -417,8 +394,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
             return;
         }
         object_property_set_int(OBJECT(&s->spi[i]), 1, "num-cs", &err);
-        object_property_set_bool(OBJECT(&s->spi[i]), true, "realized",
-                                 &local_err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), &local_err);
         error_propagate(&err, local_err);
         if (err) {
             error_propagate(errp, err);
@@ -432,7 +408,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
 
     /* EHCI */
     for (i = 0; i < sc->ehcis_num; i++) {
-        object_property_set_bool(OBJECT(&s->ehci[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->ehci[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -444,7 +420,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     }
 
     /* SDMC - SDRAM Memory Controller */
-    object_property_set_bool(OBJECT(&s->sdmc), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->sdmc), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -457,7 +433,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
 
         object_property_set_link(OBJECT(&s->wdt[i]),
                                  OBJECT(&s->scu), "scu", &error_abort);
-        object_property_set_bool(OBJECT(&s->wdt[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -467,12 +443,10 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     }
 
     /* Net */
-    for (i = 0; i < nb_nics && i < sc->macs_num; i++) {
-        qdev_set_nic_properties(DEVICE(&s->ftgmac100[i]), &nd_table[i]);
+    for (i = 0; i < sc->macs_num; i++) {
         object_property_set_bool(OBJECT(&s->ftgmac100[i]), true, "aspeed",
                                  &err);
-        object_property_set_bool(OBJECT(&s->ftgmac100[i]), true, "realized",
-                                 &local_err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->ftgmac100[i]), &local_err);
         error_propagate(&err, local_err);
         if (err) {
             error_propagate(errp, err);
@@ -485,8 +459,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
 
         object_property_set_link(OBJECT(&s->mii[i]), OBJECT(&s->ftgmac100[i]),
                                  "nic", &error_abort);
-        object_property_set_bool(OBJECT(&s->mii[i]), true, "realized",
-                                 &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->mii[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -497,7 +470,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     }
 
     /* XDMA */
-    object_property_set_bool(OBJECT(&s->xdma), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->xdma), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -508,7 +481,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
                        aspeed_soc_get_irq(s, ASPEED_XDMA));
 
     /* GPIO */
-    object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gpio), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -517,7 +490,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->gpio), 0,
                        aspeed_soc_get_irq(s, ASPEED_GPIO));
 
-    object_property_set_bool(OBJECT(&s->gpio_1_8v), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gpio_1_8v), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -528,7 +501,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
                        aspeed_soc_get_irq(s, ASPEED_GPIO_1_8V));
 
     /* SDHCI */
-    object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->sdhci), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -539,7 +512,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
                        aspeed_soc_get_irq(s, ASPEED_SDHCI));
 
     /* eMMC */
-    object_property_set_bool(OBJECT(&s->emmc), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->emmc), &err);
     if (err) {
         error_propagate(errp, err);
         return;
diff --git a/hw/arm/aspeed_soc.c b/hw/arm/aspeed_soc.c
index cf6b6dd116..810cf9b6cc 100644
--- a/hw/arm/aspeed_soc.c
+++ b/hw/arm/aspeed_soc.c
@@ -142,14 +142,11 @@ static void aspeed_soc_init(Object *obj)
     }
 
     for (i = 0; i < sc->num_cpus; i++) {
-        object_initialize_child(obj, "cpu[*]", OBJECT(&s->cpu[i]),
-                                sizeof(s->cpu[i]), sc->cpu_type,
-                                &error_abort, NULL);
+        object_initialize_child(obj, "cpu[*]", &s->cpu[i], sc->cpu_type);
     }
 
     snprintf(typename, sizeof(typename), "aspeed.scu-%s", socname);
-    sysbus_init_child_obj(obj, "scu", OBJECT(&s->scu), sizeof(s->scu),
-                          typename);
+    object_initialize_child(obj, "scu", &s->scu, typename);
     qdev_prop_set_uint32(DEVICE(&s->scu), "silicon-rev",
                          sc->silicon_rev);
     object_property_add_alias(obj, "hw-strap1", OBJECT(&s->scu),
@@ -159,39 +156,32 @@ static void aspeed_soc_init(Object *obj)
     object_property_add_alias(obj, "hw-prot-key", OBJECT(&s->scu),
                               "hw-prot-key");
 
-    sysbus_init_child_obj(obj, "vic", OBJECT(&s->vic), sizeof(s->vic),
-                          TYPE_ASPEED_VIC);
+    object_initialize_child(obj, "vic", &s->vic, TYPE_ASPEED_VIC);
 
-    sysbus_init_child_obj(obj, "rtc", OBJECT(&s->rtc), sizeof(s->rtc),
-                          TYPE_ASPEED_RTC);
+    object_initialize_child(obj, "rtc", &s->rtc, TYPE_ASPEED_RTC);
 
     snprintf(typename, sizeof(typename), "aspeed.timer-%s", socname);
-    sysbus_init_child_obj(obj, "timerctrl", OBJECT(&s->timerctrl),
-                          sizeof(s->timerctrl), typename);
+    object_initialize_child(obj, "timerctrl", &s->timerctrl, typename);
 
     snprintf(typename, sizeof(typename), "aspeed.i2c-%s", socname);
-    sysbus_init_child_obj(obj, "i2c", OBJECT(&s->i2c), sizeof(s->i2c),
-                          typename);
+    object_initialize_child(obj, "i2c", &s->i2c, typename);
 
     snprintf(typename, sizeof(typename), "aspeed.fmc-%s", socname);
-    sysbus_init_child_obj(obj, "fmc", OBJECT(&s->fmc), sizeof(s->fmc),
-                          typename);
+    object_initialize_child(obj, "fmc", &s->fmc, typename);
     object_property_add_alias(obj, "num-cs", OBJECT(&s->fmc), "num-cs");
 
     for (i = 0; i < sc->spis_num; i++) {
         snprintf(typename, sizeof(typename), "aspeed.spi%d-%s", i + 1, socname);
-        sysbus_init_child_obj(obj, "spi[*]", OBJECT(&s->spi[i]),
-                              sizeof(s->spi[i]), typename);
+        object_initialize_child(obj, "spi[*]", &s->spi[i], typename);
     }
 
     for (i = 0; i < sc->ehcis_num; i++) {
-        sysbus_init_child_obj(obj, "ehci[*]", OBJECT(&s->ehci[i]),
-                              sizeof(s->ehci[i]), TYPE_PLATFORM_EHCI);
+        object_initialize_child(obj, "ehci[*]", &s->ehci[i],
+                                TYPE_PLATFORM_EHCI);
     }
 
     snprintf(typename, sizeof(typename), "aspeed.sdmc-%s", socname);
-    sysbus_init_child_obj(obj, "sdmc", OBJECT(&s->sdmc), sizeof(s->sdmc),
-                          typename);
+    object_initialize_child(obj, "sdmc", &s->sdmc, typename);
     object_property_add_alias(obj, "ram-size", OBJECT(&s->sdmc),
                               "ram-size");
     object_property_add_alias(obj, "max-ram-size", OBJECT(&s->sdmc),
@@ -199,31 +189,27 @@ static void aspeed_soc_init(Object *obj)
 
     for (i = 0; i < sc->wdts_num; i++) {
         snprintf(typename, sizeof(typename), "aspeed.wdt-%s", socname);
-        sysbus_init_child_obj(obj, "wdt[*]", OBJECT(&s->wdt[i]),
-                              sizeof(s->wdt[i]), typename);
+        object_initialize_child(obj, "wdt[*]", &s->wdt[i], typename);
     }
 
     for (i = 0; i < sc->macs_num; i++) {
-        sysbus_init_child_obj(obj, "ftgmac100[*]", OBJECT(&s->ftgmac100[i]),
-                              sizeof(s->ftgmac100[i]), TYPE_FTGMAC100);
+        object_initialize_child(obj, "ftgmac100[*]", &s->ftgmac100[i],
+                                TYPE_FTGMAC100);
     }
 
-    sysbus_init_child_obj(obj, "xdma", OBJECT(&s->xdma), sizeof(s->xdma),
-                          TYPE_ASPEED_XDMA);
+    object_initialize_child(obj, "xdma", &s->xdma, TYPE_ASPEED_XDMA);
 
     snprintf(typename, sizeof(typename), "aspeed.gpio-%s", socname);
-    sysbus_init_child_obj(obj, "gpio", OBJECT(&s->gpio), sizeof(s->gpio),
-                          typename);
+    object_initialize_child(obj, "gpio", &s->gpio, typename);
 
-    sysbus_init_child_obj(obj, "sdc", OBJECT(&s->sdhci), sizeof(s->sdhci),
-                          TYPE_ASPEED_SDHCI);
+    object_initialize_child(obj, "sdc", &s->sdhci, TYPE_ASPEED_SDHCI);
 
     object_property_set_int(OBJECT(&s->sdhci), 2, "num-slots", &error_abort);
 
     /* Init sd card slot class here so that they're under the correct parent */
     for (i = 0; i < ASPEED_SDHCI_NUM_SLOTS; ++i) {
-        sysbus_init_child_obj(obj, "sdhci[*]", OBJECT(&s->sdhci.slots[i]),
-                              sizeof(s->sdhci.slots[i]), TYPE_SYSBUS_SDHCI);
+        object_initialize_child(obj, "sdhci[*]", &s->sdhci.slots[i],
+                                TYPE_SYSBUS_SDHCI);
     }
 }
 
@@ -242,15 +228,9 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     create_unimplemented_device("aspeed.video", sc->memmap[ASPEED_VIDEO],
                                 0x1000);
 
-    if (s->num_cpus > sc->num_cpus) {
-        warn_report("%s: invalid number of CPUs %d, using default %d",
-                    sc->name, s->num_cpus, sc->num_cpus);
-        s->num_cpus = sc->num_cpus;
-    }
-
     /* CPU */
-    for (i = 0; i < s->num_cpus; i++) {
-        object_property_set_bool(OBJECT(&s->cpu[i]), true, "realized", &err);
+    for (i = 0; i < sc->num_cpus; i++) {
+        qdev_realize(DEVICE(&s->cpu[i]), NULL, &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -268,7 +248,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
                                 sc->memmap[ASPEED_SRAM], &s->sram);
 
     /* SCU */
-    object_property_set_bool(OBJECT(&s->scu), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->scu), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -276,7 +256,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->scu), 0, sc->memmap[ASPEED_SCU]);
 
     /* VIC */
-    object_property_set_bool(OBJECT(&s->vic), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->vic), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -288,7 +268,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
                        qdev_get_gpio_in(DEVICE(&s->cpu), ARM_CPU_FIQ));
 
     /* RTC */
-    object_property_set_bool(OBJECT(&s->rtc), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->rtc), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -300,7 +280,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     /* Timer */
     object_property_set_link(OBJECT(&s->timerctrl),
                              OBJECT(&s->scu), "scu", &error_abort);
-    object_property_set_bool(OBJECT(&s->timerctrl), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->timerctrl), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -325,7 +305,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, err);
         return;
     }
-    object_property_set_bool(OBJECT(&s->i2c), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->i2c), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -346,7 +326,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, err);
         return;
     }
-    object_property_set_bool(OBJECT(&s->fmc), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->fmc), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -360,8 +340,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     /* SPI */
     for (i = 0; i < sc->spis_num; i++) {
         object_property_set_int(OBJECT(&s->spi[i]), 1, "num-cs", &err);
-        object_property_set_bool(OBJECT(&s->spi[i]), true, "realized",
-                                 &local_err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), &local_err);
         error_propagate(&err, local_err);
         if (err) {
             error_propagate(errp, err);
@@ -375,7 +354,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
 
     /* EHCI */
     for (i = 0; i < sc->ehcis_num; i++) {
-        object_property_set_bool(OBJECT(&s->ehci[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->ehci[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -387,7 +366,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     }
 
     /* SDMC - SDRAM Memory Controller */
-    object_property_set_bool(OBJECT(&s->sdmc), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->sdmc), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -400,7 +379,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
 
         object_property_set_link(OBJECT(&s->wdt[i]),
                                  OBJECT(&s->scu), "scu", &error_abort);
-        object_property_set_bool(OBJECT(&s->wdt[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -410,12 +389,10 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     }
 
     /* Net */
-    for (i = 0; i < nb_nics && i < sc->macs_num; i++) {
-        qdev_set_nic_properties(DEVICE(&s->ftgmac100[i]), &nd_table[i]);
+    for (i = 0; i < sc->macs_num; i++) {
         object_property_set_bool(OBJECT(&s->ftgmac100[i]), true, "aspeed",
                                  &err);
-        object_property_set_bool(OBJECT(&s->ftgmac100[i]), true, "realized",
-                                 &local_err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->ftgmac100[i]), &local_err);
         error_propagate(&err, local_err);
         if (err) {
             error_propagate(errp, err);
@@ -428,7 +405,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     }
 
     /* XDMA */
-    object_property_set_bool(OBJECT(&s->xdma), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->xdma), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -439,7 +416,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
                        aspeed_soc_get_irq(s, ASPEED_XDMA));
 
     /* GPIO */
-    object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gpio), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -449,7 +426,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
                        aspeed_soc_get_irq(s, ASPEED_GPIO));
 
     /* SDHCI */
-    object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->sdhci), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -460,7 +437,6 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
                        aspeed_soc_get_irq(s, ASPEED_SDHCI));
 }
 static Property aspeed_soc_properties[] = {
-    DEFINE_PROP_UINT32("num-cpus", AspeedSoCState, num_cpus, 0),
     DEFINE_PROP_LINK("dram", AspeedSoCState, dram_mr, TYPE_MEMORY_REGION,
                      MemoryRegion *),
     DEFINE_PROP_END_OF_LIST(),
diff --git a/hw/arm/bcm2835_peripherals.c b/hw/arm/bcm2835_peripherals.c
index cca5b5ad04..1e975d7eec 100644
--- a/hw/arm/bcm2835_peripherals.c
+++ b/hw/arm/bcm2835_peripherals.c
@@ -27,12 +27,10 @@ static void create_unimp(BCM2835PeripheralState *ps,
                          UnimplementedDeviceState *uds,
                          const char *name, hwaddr ofs, hwaddr size)
 {
-    sysbus_init_child_obj(OBJECT(ps), name, uds,
-                          sizeof(UnimplementedDeviceState),
-                          TYPE_UNIMPLEMENTED_DEVICE);
+    object_initialize_child(OBJECT(ps), name, uds, TYPE_UNIMPLEMENTED_DEVICE);
     qdev_prop_set_string(DEVICE(uds), "name", name);
     qdev_prop_set_uint64(DEVICE(uds), "size", size);
-    object_property_set_bool(OBJECT(uds), true, "realized", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(uds), &error_fatal);
     memory_region_add_subregion_overlap(&ps->peri_mr, ofs,
                     sysbus_mmio_get_region(SYS_BUS_DEVICE(uds), 0), -1000);
 }
@@ -55,37 +53,34 @@ static void bcm2835_peripherals_init(Object *obj)
                        MBOX_CHAN_COUNT << MBOX_AS_CHAN_SHIFT);
 
     /* Interrupt Controller */
-    sysbus_init_child_obj(obj, "ic", &s->ic, sizeof(s->ic), TYPE_BCM2835_IC);
+    object_initialize_child(obj, "ic", &s->ic, TYPE_BCM2835_IC);
 
     /* SYS Timer */
-    sysbus_init_child_obj(obj, "systimer", &s->systmr, sizeof(s->systmr),
-                          TYPE_BCM2835_SYSTIMER);
+    object_initialize_child(obj, "systimer", &s->systmr,
+                            TYPE_BCM2835_SYSTIMER);
 
     /* UART0 */
-    sysbus_init_child_obj(obj, "uart0", &s->uart0, sizeof(s->uart0),
-                          TYPE_PL011);
+    object_initialize_child(obj, "uart0", &s->uart0, TYPE_PL011);
 
     /* AUX / UART1 */
-    sysbus_init_child_obj(obj, "aux", &s->aux, sizeof(s->aux),
-                          TYPE_BCM2835_AUX);
+    object_initialize_child(obj, "aux", &s->aux, TYPE_BCM2835_AUX);
 
     /* Mailboxes */
-    sysbus_init_child_obj(obj, "mbox", &s->mboxes, sizeof(s->mboxes),
-                          TYPE_BCM2835_MBOX);
+    object_initialize_child(obj, "mbox", &s->mboxes, TYPE_BCM2835_MBOX);
 
     object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr",
                                    OBJECT(&s->mbox_mr));
 
     /* Framebuffer */
-    sysbus_init_child_obj(obj, "fb", &s->fb, sizeof(s->fb), TYPE_BCM2835_FB);
+    object_initialize_child(obj, "fb", &s->fb, TYPE_BCM2835_FB);
     object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size");
 
     object_property_add_const_link(OBJECT(&s->fb), "dma-mr",
                                    OBJECT(&s->gpu_bus_mr));
 
     /* Property channel */
-    sysbus_init_child_obj(obj, "property", &s->property, sizeof(s->property),
-                          TYPE_BCM2835_PROPERTY);
+    object_initialize_child(obj, "property", &s->property,
+                            TYPE_BCM2835_PROPERTY);
     object_property_add_alias(obj, "board-rev", OBJECT(&s->property),
                               "board-rev");
 
@@ -95,31 +90,25 @@ static void bcm2835_peripherals_init(Object *obj)
                                    OBJECT(&s->gpu_bus_mr));
 
     /* Random Number Generator */
-    sysbus_init_child_obj(obj, "rng", &s->rng, sizeof(s->rng),
-                          TYPE_BCM2835_RNG);
+    object_initialize_child(obj, "rng", &s->rng, TYPE_BCM2835_RNG);
 
     /* Extended Mass Media Controller */
-    sysbus_init_child_obj(obj, "sdhci", &s->sdhci, sizeof(s->sdhci),
-                          TYPE_SYSBUS_SDHCI);
+    object_initialize_child(obj, "sdhci", &s->sdhci, TYPE_SYSBUS_SDHCI);
 
     /* SDHOST */
-    sysbus_init_child_obj(obj, "sdhost", &s->sdhost, sizeof(s->sdhost),
-                          TYPE_BCM2835_SDHOST);
+    object_initialize_child(obj, "sdhost", &s->sdhost, TYPE_BCM2835_SDHOST);
 
     /* DMA Channels */
-    sysbus_init_child_obj(obj, "dma", &s->dma, sizeof(s->dma),
-                          TYPE_BCM2835_DMA);
+    object_initialize_child(obj, "dma", &s->dma, TYPE_BCM2835_DMA);
 
     object_property_add_const_link(OBJECT(&s->dma), "dma-mr",
                                    OBJECT(&s->gpu_bus_mr));
 
     /* Thermal */
-    sysbus_init_child_obj(obj, "thermal", &s->thermal, sizeof(s->thermal),
-                          TYPE_BCM2835_THERMAL);
+    object_initialize_child(obj, "thermal", &s->thermal, TYPE_BCM2835_THERMAL);
 
     /* GPIO */
-    sysbus_init_child_obj(obj, "gpio", &s->gpio, sizeof(s->gpio),
-                          TYPE_BCM2835_GPIO);
+    object_initialize_child(obj, "gpio", &s->gpio, TYPE_BCM2835_GPIO);
 
     object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhci",
                                    OBJECT(&s->sdhci.sdbus));
@@ -127,12 +116,10 @@ static void bcm2835_peripherals_init(Object *obj)
                                    OBJECT(&s->sdhost.sdbus));
 
     /* Mphi */
-    sysbus_init_child_obj(obj, "mphi", &s->mphi, sizeof(s->mphi),
-                          TYPE_BCM2835_MPHI);
+    object_initialize_child(obj, "mphi", &s->mphi, TYPE_BCM2835_MPHI);
 
     /* DWC2 */
-    sysbus_init_child_obj(obj, "dwc2", &s->dwc2, sizeof(s->dwc2),
-                          TYPE_DWC2_USB);
+    object_initialize_child(obj, "dwc2", &s->dwc2, TYPE_DWC2_USB);
 
     object_property_add_const_link(OBJECT(&s->dwc2), "dma-mr",
                                    OBJECT(&s->gpu_bus_mr));
@@ -174,7 +161,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
     }
 
     /* Interrupt Controller */
-    object_property_set_bool(OBJECT(&s->ic), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->ic), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -185,7 +172,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
     sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic));
 
     /* Sys Timer */
-    object_property_set_bool(OBJECT(&s->systmr), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->systmr), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -198,7 +185,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
 
     /* UART0 */
     qdev_prop_set_chr(DEVICE(&s->uart0), "chardev", serial_hd(0));
-    object_property_set_bool(OBJECT(&s->uart0), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->uart0), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -213,7 +200,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
     /* AUX / UART1 */
     qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hd(1));
 
-    object_property_set_bool(OBJECT(&s->aux), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->aux), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -226,7 +213,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
                                INTERRUPT_AUX));
 
     /* Mailboxes */
-    object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->mboxes), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -252,7 +239,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    object_property_set_bool(OBJECT(&s->fb), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->fb), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -264,7 +251,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
                        qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB));
 
     /* Property channel */
-    object_property_set_bool(OBJECT(&s->property), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->property), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -277,7 +264,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
                       qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY));
 
     /* Random Number Generator */
-    object_property_set_bool(OBJECT(&s->rng), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->rng), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -306,7 +293,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->sdhci), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -319,7 +306,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
                                INTERRUPT_ARASANSDIO));
 
     /* SDHOST */
-    object_property_set_bool(OBJECT(&s->sdhost), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->sdhost), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -332,7 +319,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
                                INTERRUPT_SDIO));
 
     /* DMA Channels */
-    object_property_set_bool(OBJECT(&s->dma), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->dma), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -351,7 +338,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
     }
 
     /* THERMAL */
-    object_property_set_bool(OBJECT(&s->thermal), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->thermal), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -360,7 +347,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->thermal), 0));
 
     /* GPIO */
-    object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gpio), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -372,7 +359,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->gpio), "sd-bus");
 
     /* Mphi */
-    object_property_set_bool(OBJECT(&s->mphi), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->mphi), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -385,7 +372,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
                                INTERRUPT_HOSTPORT));
 
     /* DWC2 */
-    object_property_set_bool(OBJECT(&s->dwc2), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->dwc2), &err);
     if (err) {
         error_propagate(errp, err);
         return;
diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
index e51b4e0c43..ed1793f7b7 100644
--- a/hw/arm/bcm2836.c
+++ b/hw/arm/bcm2836.c
@@ -53,15 +53,13 @@ static void bcm2836_init(Object *obj)
 
     for (n = 0; n < BCM283X_NCPUS; n++) {
         object_initialize_child(obj, "cpu[*]", &s->cpu[n].core,
-                                sizeof(s->cpu[n].core), info->cpu_type,
-                                &error_abort, NULL);
+                                info->cpu_type);
     }
 
-    sysbus_init_child_obj(obj, "control", &s->control, sizeof(s->control),
-                          TYPE_BCM2836_CONTROL);
+    object_initialize_child(obj, "control", &s->control, TYPE_BCM2836_CONTROL);
 
-    sysbus_init_child_obj(obj, "peripherals", &s->peripherals,
-                          sizeof(s->peripherals), TYPE_BCM2835_PERIPHERALS);
+    object_initialize_child(obj, "peripherals", &s->peripherals,
+                            TYPE_BCM2835_PERIPHERALS);
     object_property_add_alias(obj, "board-rev", OBJECT(&s->peripherals),
                               "board-rev");
     object_property_add_alias(obj, "vcram-size", OBJECT(&s->peripherals),
@@ -88,7 +86,7 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
 
     object_property_add_const_link(OBJECT(&s->peripherals), "ram", obj);
 
-    object_property_set_bool(OBJECT(&s->peripherals), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->peripherals), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -101,7 +99,7 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
                             info->peri_base, 1);
 
     /* bcm2836 interrupt controller (and mailboxes, etc.) */
-    object_property_set_bool(OBJECT(&s->control), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->control), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -135,8 +133,7 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
             return;
         }
 
-        object_property_set_bool(OBJECT(&s->cpu[n].core), true,
-                                 "realized", &err);
+        qdev_realize(DEVICE(&s->cpu[n].core), NULL, &err);
         if (err) {
             error_propagate(errp, err);
             return;
diff --git a/hw/arm/cubieboard.c b/hw/arm/cubieboard.c
index cd1b6d3e19..a96c860575 100644
--- a/hw/arm/cubieboard.c
+++ b/hw/arm/cubieboard.c
@@ -80,7 +80,7 @@ static void cubieboard_init(MachineState *machine)
         exit(1);
     }
 
-    object_property_set_bool(OBJECT(a10), true, "realized", &err);
+    qdev_realize(DEVICE(a10), NULL, &err);
     if (err != NULL) {
         error_reportf_err(err, "Couldn't realize Allwinner A10: ");
         exit(1);
@@ -92,9 +92,9 @@ static void cubieboard_init(MachineState *machine)
     bus = qdev_get_child_bus(DEVICE(a10), "sd-bus");
 
     /* Plug in SD card */
-    carddev = qdev_create(bus, TYPE_SD_CARD);
+    carddev = qdev_new(TYPE_SD_CARD);
     qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
-    object_property_set_bool(OBJECT(carddev), true, "realized", &error_fatal);
+    qdev_realize_and_unref(carddev, bus, &error_fatal);
 
     memory_region_add_subregion(get_system_memory(), AW_A10_SDRAM_BASE,
                                 machine->ram);
diff --git a/hw/arm/digic.c b/hw/arm/digic.c
index 22434a65a2..13a83f7430 100644
--- a/hw/arm/digic.c
+++ b/hw/arm/digic.c
@@ -36,21 +36,17 @@ static void digic_init(Object *obj)
     DigicState *s = DIGIC(obj);
     int i;
 
-    object_initialize_child(obj, "cpu", &s->cpu, sizeof(s->cpu),
-                            ARM_CPU_TYPE_NAME("arm946"),
-                            &error_abort, NULL);
+    object_initialize_child(obj, "cpu", &s->cpu, ARM_CPU_TYPE_NAME("arm946"));
 
     for (i = 0; i < DIGIC4_NB_TIMERS; i++) {
 #define DIGIC_TIMER_NAME_MLEN    11
         char name[DIGIC_TIMER_NAME_MLEN];
 
         snprintf(name, DIGIC_TIMER_NAME_MLEN, "timer[%d]", i);
-        sysbus_init_child_obj(obj, name, &s->timer[i], sizeof(s->timer[i]),
-                              TYPE_DIGIC_TIMER);
+        object_initialize_child(obj, name, &s->timer[i], TYPE_DIGIC_TIMER);
     }
 
-    sysbus_init_child_obj(obj, "uart", &s->uart, sizeof(s->uart),
-                          TYPE_DIGIC_UART);
+    object_initialize_child(obj, "uart", &s->uart, TYPE_DIGIC_UART);
 }
 
 static void digic_realize(DeviceState *dev, Error **errp)
@@ -66,14 +62,14 @@ static void digic_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);
+    qdev_realize(DEVICE(&s->cpu), NULL, &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
     }
 
     for (i = 0; i < DIGIC4_NB_TIMERS; i++) {
-        object_property_set_bool(OBJECT(&s->timer[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->timer[i]), &err);
         if (err != NULL) {
             error_propagate(errp, err);
             return;
@@ -84,7 +80,7 @@ static void digic_realize(DeviceState *dev, Error **errp)
     }
 
     qdev_prop_set_chr(DEVICE(&s->uart), "chardev", serial_hd(0));
-    object_property_set_bool(OBJECT(&s->uart), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->uart), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
diff --git a/hw/arm/digic_boards.c b/hw/arm/digic_boards.c
index 518a63e61d..b6452d918c 100644
--- a/hw/arm/digic_boards.c
+++ b/hw/arm/digic_boards.c
@@ -62,7 +62,7 @@ static void digic4_board_init(MachineState *machine, DigicBoard *board)
         exit(EXIT_FAILURE);
     }
 
-    object_property_set_bool(OBJECT(s), true, "realized", &err);
+    qdev_realize(DEVICE(s), NULL, &err);
     if (err != NULL) {
         error_reportf_err(err, "Couldn't realize DIGIC SoC: ");
         exit(1);
diff --git a/hw/arm/exynos4210.c b/hw/arm/exynos4210.c
index 1f7253ef6f..b888a5c9ab 100644
--- a/hw/arm/exynos4210.c
+++ b/hw/arm/exynos4210.c
@@ -173,7 +173,7 @@ static DeviceState *pl330_create(uint32_t base, qemu_or_irq *orgate,
     DeviceState *dev;
     int i;
 
-    dev = qdev_create(NULL, "pl330");
+    dev = qdev_new("pl330");
     qdev_prop_set_uint8(dev, "num_events", nevents);
     qdev_prop_set_uint8(dev, "num_chnls",  8);
     qdev_prop_set_uint8(dev, "num_periph_req",  nreq);
@@ -184,13 +184,13 @@ static DeviceState *pl330_create(uint32_t base, qemu_or_irq *orgate,
     qdev_prop_set_uint8(dev, "rd_q_dep", 8);
     qdev_prop_set_uint8(dev, "data_width", width);
     qdev_prop_set_uint16(dev, "data_buffer_dep", width);
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, base);
 
     object_property_set_int(OBJECT(orgate), nevents + 1, "num-lines",
                             &error_abort);
-    object_property_set_bool(OBJECT(orgate), true, "realized", &error_abort);
+    qdev_realize(DEVICE(orgate), NULL, &error_abort);
 
     for (i = 0; i < nevents + 1; i++) {
         sysbus_connect_irq(busdev, i, qdev_get_gpio_in(DEVICE(orgate), i));
@@ -223,7 +223,7 @@ static void exynos4210_realize(DeviceState *socdev, Error **errp)
                                 "mp-affinity", &error_abort);
         object_property_set_int(cpuobj, EXYNOS4210_SMP_PRIVATE_BASE_ADDR,
                                 "reset-cbar", &error_abort);
-        object_property_set_bool(cpuobj, true, "realized", &error_fatal);
+        qdev_realize(DEVICE(cpuobj), NULL, &error_fatal);
     }
 
     /*** IRQs ***/
@@ -232,9 +232,9 @@ static void exynos4210_realize(DeviceState *socdev, Error **errp)
 
     /* IRQ Gate */
     for (i = 0; i < EXYNOS4210_NCPUS; i++) {
-        dev = qdev_create(NULL, "exynos4210.irq_gate");
+        dev = qdev_new("exynos4210.irq_gate");
         qdev_prop_set_uint32(dev, "n_in", EXYNOS4210_IRQ_GATE_NINPUTS);
-        qdev_init_nofail(dev);
+        sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
         /* Get IRQ Gate input in gate_irq */
         for (n = 0; n < EXYNOS4210_IRQ_GATE_NINPUTS; n++) {
             gate_irq[i][n] = qdev_get_gpio_in(dev, n);
@@ -247,10 +247,10 @@ static void exynos4210_realize(DeviceState *socdev, Error **errp)
     }
 
     /* Private memory region and Internal GIC */
-    dev = qdev_create(NULL, TYPE_A9MPCORE_PRIV);
+    dev = qdev_new(TYPE_A9MPCORE_PRIV);
     qdev_prop_set_uint32(dev, "num-cpu", EXYNOS4210_NCPUS);
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, EXYNOS4210_SMP_PRIVATE_BASE_ADDR);
     for (n = 0; n < EXYNOS4210_NCPUS; n++) {
         sysbus_connect_irq(busdev, n, gate_irq[n][0]);
@@ -263,10 +263,10 @@ static void exynos4210_realize(DeviceState *socdev, Error **errp)
     sysbus_create_simple("l2x0", EXYNOS4210_L2X0_BASE_ADDR, NULL);
 
     /* External GIC */
-    dev = qdev_create(NULL, "exynos4210.gic");
+    dev = qdev_new("exynos4210.gic");
     qdev_prop_set_uint32(dev, "num-cpu", EXYNOS4210_NCPUS);
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     /* Map CPU interface */
     sysbus_mmio_map(busdev, 0, EXYNOS4210_EXT_GIC_CPU_BASE_ADDR);
     /* Map Distributer interface */
@@ -279,9 +279,9 @@ static void exynos4210_realize(DeviceState *socdev, Error **errp)
     }
 
     /* Internal Interrupt Combiner */
-    dev = qdev_create(NULL, "exynos4210.combiner");
-    qdev_init_nofail(dev);
+    dev = qdev_new("exynos4210.combiner");
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     for (n = 0; n < EXYNOS4210_MAX_INT_COMBINER_OUT_IRQ; n++) {
         sysbus_connect_irq(busdev, n, s->irqs.int_gic_irq[n]);
     }
@@ -289,10 +289,10 @@ static void exynos4210_realize(DeviceState *socdev, Error **errp)
     sysbus_mmio_map(busdev, 0, EXYNOS4210_INT_COMBINER_BASE_ADDR);
 
     /* External Interrupt Combiner */
-    dev = qdev_create(NULL, "exynos4210.combiner");
+    dev = qdev_new("exynos4210.combiner");
     qdev_prop_set_uint32(dev, "external", 1);
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     for (n = 0; n < EXYNOS4210_MAX_INT_COMBINER_OUT_IRQ; n++) {
         sysbus_connect_irq(busdev, n, s->irqs.ext_gic_irq[n]);
     }
@@ -353,9 +353,9 @@ static void exynos4210_realize(DeviceState *socdev, Error **errp)
                           NULL);
 
     /* Multi Core Timer */
-    dev = qdev_create(NULL, "exynos4210.mct");
-    qdev_init_nofail(dev);
+    dev = qdev_new("exynos4210.mct");
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     for (n = 0; n < 4; n++) {
         /* Connect global timer interrupts to Combiner gpio_in */
         sysbus_connect_irq(busdev, n,
@@ -379,9 +379,9 @@ static void exynos4210_realize(DeviceState *socdev, Error **errp)
             i2c_irq = s->irq_table[exynos4210_get_irq(EXYNOS4210_HDMI_INTG, 1)];
         }
 
-        dev = qdev_create(NULL, "exynos4210.i2c");
-        qdev_init_nofail(dev);
+        dev = qdev_new("exynos4210.i2c");
         busdev = SYS_BUS_DEVICE(dev);
+        sysbus_realize_and_unref(busdev, &error_fatal);
         sysbus_connect_irq(busdev, 0, i2c_irq);
         sysbus_mmio_map(busdev, 0, addr);
         s->i2c_if[n] = (I2CBus *)qdev_get_child_bus(dev, "i2c");
@@ -423,19 +423,20 @@ static void exynos4210_realize(DeviceState *socdev, Error **errp)
          * public datasheet which is very similar (implementing
          * MMC Specification Version 4.0 being the only difference noted)
          */
-        dev = qdev_create(NULL, TYPE_S3C_SDHCI);
+        dev = qdev_new(TYPE_S3C_SDHCI);
         qdev_prop_set_uint64(dev, "capareg", EXYNOS4210_SDHCI_CAPABILITIES);
-        qdev_init_nofail(dev);
 
         busdev = SYS_BUS_DEVICE(dev);
+        sysbus_realize_and_unref(busdev, &error_fatal);
         sysbus_mmio_map(busdev, 0, EXYNOS4210_SDHCI_ADDR(n));
         sysbus_connect_irq(busdev, 0, s->irq_table[exynos4210_get_irq(29, n)]);
 
         di = drive_get(IF_SD, 0, n);
         blk = di ? blk_by_legacy_dinfo(di) : NULL;
-        carddev = qdev_create(qdev_get_child_bus(dev, "sd-bus"), TYPE_SD_CARD);
+        carddev = qdev_new(TYPE_SD_CARD);
         qdev_prop_set_drive(carddev, "drive", blk, &error_abort);
-        qdev_init_nofail(carddev);
+        qdev_realize_and_unref(carddev, qdev_get_child_bus(dev, "sd-bus"),
+                               &error_fatal);
     }
 
     /*** Display controller (FIMD) ***/
@@ -481,8 +482,7 @@ static void exynos4210_init(Object *obj)
         char *name = g_strdup_printf("pl330-irq-orgate%d", i);
         qemu_or_irq *orgate = &s->pl330_irq_orgate[i];
 
-        object_initialize_child(obj, name, orgate, sizeof(*orgate),
-                                TYPE_OR_IRQ, &error_abort, NULL);
+        object_initialize_child(obj, name, orgate, TYPE_OR_IRQ);
         g_free(name);
     }
 }
diff --git a/hw/arm/exynos4_boards.c b/hw/arm/exynos4_boards.c
index 09da52876d..56b729141b 100644
--- a/hw/arm/exynos4_boards.c
+++ b/hw/arm/exynos4_boards.c
@@ -81,11 +81,11 @@ static void lan9215_init(uint32_t base, qemu_irq irq)
     /* This should be a 9215 but the 9118 is close enough */
     if (nd_table[0].used) {
         qemu_check_nic_model(&nd_table[0], "lan9118");
-        dev = qdev_create(NULL, TYPE_LAN9118);
+        dev = qdev_new(TYPE_LAN9118);
         qdev_set_nic_properties(dev, &nd_table[0]);
         qdev_prop_set_uint32(dev, "mode_16bit", 1);
-        qdev_init_nofail(dev);
         s = SYS_BUS_DEVICE(dev);
+        sysbus_realize_and_unref(s, &error_fatal);
         sysbus_mmio_map(s, 0, base);
         sysbus_connect_irq(s, 0, irq);
     }
@@ -128,10 +128,9 @@ exynos4_boards_init_common(MachineState *machine,
     exynos4_boards_init_ram(s, get_system_memory(),
                             exynos4_board_ram_size[board_type]);
 
-    sysbus_init_child_obj(OBJECT(machine), "soc",
-                          &s->soc, sizeof(s->soc), TYPE_EXYNOS4210_SOC);
-    object_property_set_bool(OBJECT(&s->soc), true, "realized",
-                             &error_fatal);
+    object_initialize_child(OBJECT(machine), "soc", &s->soc,
+                            TYPE_EXYNOS4210_SOC);
+    sysbus_realize(SYS_BUS_DEVICE(&s->soc), &error_fatal);
 
     return s;
 }
diff --git a/hw/arm/fsl-imx25.c b/hw/arm/fsl-imx25.c
index cdaa79c26b..fb516bdbac 100644
--- a/hw/arm/fsl-imx25.c
+++ b/hw/arm/fsl-imx25.c
@@ -38,56 +38,45 @@ static void fsl_imx25_init(Object *obj)
     FslIMX25State *s = FSL_IMX25(obj);
     int i;
 
-    object_initialize_child(obj, "cpu", &s->cpu, sizeof(s->cpu),
-                            ARM_CPU_TYPE_NAME("arm926"),
-                            &error_abort, NULL);
+    object_initialize_child(obj, "cpu", &s->cpu, ARM_CPU_TYPE_NAME("arm926"));
 
-    sysbus_init_child_obj(obj, "avic", &s->avic, sizeof(s->avic),
-                          TYPE_IMX_AVIC);
+    object_initialize_child(obj, "avic", &s->avic, TYPE_IMX_AVIC);
 
-    sysbus_init_child_obj(obj, "ccm", &s->ccm, sizeof(s->ccm), TYPE_IMX25_CCM);
+    object_initialize_child(obj, "ccm", &s->ccm, TYPE_IMX25_CCM);
 
     for (i = 0; i < FSL_IMX25_NUM_UARTS; i++) {
-        sysbus_init_child_obj(obj, "uart[*]", &s->uart[i], sizeof(s->uart[i]),
-                              TYPE_IMX_SERIAL);
+        object_initialize_child(obj, "uart[*]", &s->uart[i], TYPE_IMX_SERIAL);
     }
 
     for (i = 0; i < FSL_IMX25_NUM_GPTS; i++) {
-        sysbus_init_child_obj(obj, "gpt[*]", &s->gpt[i], sizeof(s->gpt[i]),
-                              TYPE_IMX25_GPT);
+        object_initialize_child(obj, "gpt[*]", &s->gpt[i], TYPE_IMX25_GPT);
     }
 
     for (i = 0; i < FSL_IMX25_NUM_EPITS; i++) {
-        sysbus_init_child_obj(obj, "epit[*]", &s->epit[i], sizeof(s->epit[i]),
-                              TYPE_IMX_EPIT);
+        object_initialize_child(obj, "epit[*]", &s->epit[i], TYPE_IMX_EPIT);
     }
 
-    sysbus_init_child_obj(obj, "fec", &s->fec, sizeof(s->fec), TYPE_IMX_FEC);
+    object_initialize_child(obj, "fec", &s->fec, TYPE_IMX_FEC);
 
-    sysbus_init_child_obj(obj, "rngc", &s->rngc, sizeof(s->rngc),
-                          TYPE_IMX_RNGC);
+    object_initialize_child(obj, "rngc", &s->rngc, TYPE_IMX_RNGC);
 
     for (i = 0; i < FSL_IMX25_NUM_I2CS; i++) {
-        sysbus_init_child_obj(obj, "i2c[*]", &s->i2c[i], sizeof(s->i2c[i]),
-                              TYPE_IMX_I2C);
+        object_initialize_child(obj, "i2c[*]", &s->i2c[i], TYPE_IMX_I2C);
     }
 
     for (i = 0; i < FSL_IMX25_NUM_GPIOS; i++) {
-        sysbus_init_child_obj(obj, "gpio[*]", &s->gpio[i], sizeof(s->gpio[i]),
-                              TYPE_IMX_GPIO);
+        object_initialize_child(obj, "gpio[*]", &s->gpio[i], TYPE_IMX_GPIO);
     }
 
     for (i = 0; i < FSL_IMX25_NUM_ESDHCS; i++) {
-        sysbus_init_child_obj(obj, "sdhc[*]", &s->esdhc[i], sizeof(s->esdhc[i]),
-                              TYPE_IMX_USDHC);
+        object_initialize_child(obj, "sdhc[*]", &s->esdhc[i], TYPE_IMX_USDHC);
     }
 
     for (i = 0; i < FSL_IMX25_NUM_USBS; i++) {
-        sysbus_init_child_obj(obj, "usb[*]", &s->usb[i], sizeof(s->usb[i]),
-                              TYPE_CHIPIDEA);
+        object_initialize_child(obj, "usb[*]", &s->usb[i], TYPE_CHIPIDEA);
     }
 
-    sysbus_init_child_obj(obj, "wdt", &s->wdt, sizeof(s->wdt), TYPE_IMX2_WDT);
+    object_initialize_child(obj, "wdt", &s->wdt, TYPE_IMX2_WDT);
 }
 
 static void fsl_imx25_realize(DeviceState *dev, Error **errp)
@@ -96,13 +85,13 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
     uint8_t i;
     Error *err = NULL;
 
-    object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);
+    qdev_realize(DEVICE(&s->cpu), NULL, &err);
     if (err) {
         error_propagate(errp, err);
         return;
     }
 
-    object_property_set_bool(OBJECT(&s->avic), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->avic), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -113,7 +102,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->avic), 1,
                        qdev_get_gpio_in(DEVICE(&s->cpu), ARM_CPU_FIQ));
 
-    object_property_set_bool(OBJECT(&s->ccm), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->ccm), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -135,7 +124,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
 
         qdev_prop_set_chr(DEVICE(&s->uart[i]), "chardev", serial_hd(i));
 
-        object_property_set_bool(OBJECT(&s->uart[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->uart[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -160,7 +149,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
 
         s->gpt[i].ccm = IMX_CCM(&s->ccm);
 
-        object_property_set_bool(OBJECT(&s->gpt[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->gpt[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -183,7 +172,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
 
         s->epit[i].ccm = IMX_CCM(&s->ccm);
 
-        object_property_set_bool(OBJECT(&s->epit[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->epit[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -196,7 +185,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
 
     qdev_set_nic_properties(DEVICE(&s->fec), &nd_table[0]);
 
-    object_property_set_bool(OBJECT(&s->fec), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->fec), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -205,7 +194,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->fec), 0,
                        qdev_get_gpio_in(DEVICE(&s->avic), FSL_IMX25_FEC_IRQ));
 
-    object_property_set_bool(OBJECT(&s->rngc), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->rngc), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -225,7 +214,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
             { FSL_IMX25_I2C3_ADDR, FSL_IMX25_I2C3_IRQ }
         };
 
-        object_property_set_bool(OBJECT(&s->i2c[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->i2c[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -248,7 +237,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
             { FSL_IMX25_GPIO4_ADDR, FSL_IMX25_GPIO4_IRQ }
         };
 
-        object_property_set_bool(OBJECT(&s->gpio[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -274,7 +263,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
                                  &err);
         object_property_set_uint(OBJECT(&s->esdhc[i]), IMX25_ESDHC_CAPABILITIES,
                                  "capareg", &err);
-        object_property_set_bool(OBJECT(&s->esdhc[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->esdhc[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -295,8 +284,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
             { FSL_IMX25_USB2_ADDR, FSL_IMX25_USB2_IRQ },
         };
 
-        object_property_set_bool(OBJECT(&s->usb[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->usb[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->usb[i]), 0, usb_table[i].addr);
         sysbus_connect_irq(SYS_BUS_DEVICE(&s->usb[i]), 0,
                            qdev_get_gpio_in(DEVICE(&s->avic),
@@ -306,7 +294,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
     /* Watchdog */
     object_property_set_bool(OBJECT(&s->wdt), true, "pretimeout-support",
                              &error_abort);
-    object_property_set_bool(OBJECT(&s->wdt), true, "realized", &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->wdt), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt), 0, FSL_IMX25_WDT_ADDR);
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->wdt), 0,
                                       qdev_get_gpio_in(DEVICE(&s->avic),
diff --git a/hw/arm/fsl-imx31.c b/hw/arm/fsl-imx31.c
index 1e7959863d..42cca529c3 100644
--- a/hw/arm/fsl-imx31.c
+++ b/hw/arm/fsl-imx31.c
@@ -33,38 +33,31 @@ static void fsl_imx31_init(Object *obj)
     FslIMX31State *s = FSL_IMX31(obj);
     int i;
 
-    object_initialize_child(obj, "cpu", &s->cpu, sizeof(s->cpu),
-                            ARM_CPU_TYPE_NAME("arm1136"),
-                            &error_abort, NULL);
+    object_initialize_child(obj, "cpu", &s->cpu, ARM_CPU_TYPE_NAME("arm1136"));
 
-    sysbus_init_child_obj(obj, "avic", &s->avic, sizeof(s->avic),
-                          TYPE_IMX_AVIC);
+    object_initialize_child(obj, "avic", &s->avic, TYPE_IMX_AVIC);
 
-    sysbus_init_child_obj(obj, "ccm", &s->ccm, sizeof(s->ccm), TYPE_IMX31_CCM);
+    object_initialize_child(obj, "ccm", &s->ccm, TYPE_IMX31_CCM);
 
     for (i = 0; i < FSL_IMX31_NUM_UARTS; i++) {
-        sysbus_init_child_obj(obj, "uart[*]", &s->uart[i], sizeof(s->uart[i]),
-                              TYPE_IMX_SERIAL);
+        object_initialize_child(obj, "uart[*]", &s->uart[i], TYPE_IMX_SERIAL);
     }
 
-    sysbus_init_child_obj(obj, "gpt", &s->gpt, sizeof(s->gpt), TYPE_IMX31_GPT);
+    object_initialize_child(obj, "gpt", &s->gpt, TYPE_IMX31_GPT);
 
     for (i = 0; i < FSL_IMX31_NUM_EPITS; i++) {
-        sysbus_init_child_obj(obj, "epit[*]", &s->epit[i], sizeof(s->epit[i]),
-                              TYPE_IMX_EPIT);
+        object_initialize_child(obj, "epit[*]", &s->epit[i], TYPE_IMX_EPIT);
     }
 
     for (i = 0; i < FSL_IMX31_NUM_I2CS; i++) {
-        sysbus_init_child_obj(obj, "i2c[*]", &s->i2c[i], sizeof(s->i2c[i]),
-                              TYPE_IMX_I2C);
+        object_initialize_child(obj, "i2c[*]", &s->i2c[i], TYPE_IMX_I2C);
     }
 
     for (i = 0; i < FSL_IMX31_NUM_GPIOS; i++) {
-        sysbus_init_child_obj(obj, "gpio[*]", &s->gpio[i], sizeof(s->gpio[i]),
-                              TYPE_IMX_GPIO);
+        object_initialize_child(obj, "gpio[*]", &s->gpio[i], TYPE_IMX_GPIO);
     }
 
-    sysbus_init_child_obj(obj, "wdt", &s->wdt, sizeof(s->wdt), TYPE_IMX2_WDT);
+    object_initialize_child(obj, "wdt", &s->wdt, TYPE_IMX2_WDT);
 }
 
 static void fsl_imx31_realize(DeviceState *dev, Error **errp)
@@ -73,13 +66,13 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
     uint16_t i;
     Error *err = NULL;
 
-    object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);
+    qdev_realize(DEVICE(&s->cpu), NULL, &err);
     if (err) {
         error_propagate(errp, err);
         return;
     }
 
-    object_property_set_bool(OBJECT(&s->avic), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->avic), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -90,7 +83,7 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->avic), 1,
                        qdev_get_gpio_in(DEVICE(&s->cpu), ARM_CPU_FIQ));
 
-    object_property_set_bool(OBJECT(&s->ccm), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->ccm), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -109,7 +102,7 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
 
         qdev_prop_set_chr(DEVICE(&s->uart[i]), "chardev", serial_hd(i));
 
-        object_property_set_bool(OBJECT(&s->uart[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->uart[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -123,7 +116,7 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
 
     s->gpt.ccm = IMX_CCM(&s->ccm);
 
-    object_property_set_bool(OBJECT(&s->gpt), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gpt), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -145,7 +138,7 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
 
         s->epit[i].ccm = IMX_CCM(&s->ccm);
 
-        object_property_set_bool(OBJECT(&s->epit[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->epit[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -169,7 +162,7 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
         };
 
         /* Initialize the I2C */
-        object_property_set_bool(OBJECT(&s->i2c[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->i2c[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -195,7 +188,7 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
 
         object_property_set_bool(OBJECT(&s->gpio[i]), false, "has-edge-sel",
                                  &error_abort);
-        object_property_set_bool(OBJECT(&s->gpio[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -208,7 +201,7 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
     }
 
     /* Watchdog */
-    object_property_set_bool(OBJECT(&s->wdt), true, "realized", &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->wdt), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt), 0, FSL_IMX31_WDT_ADDR);
 
     /* On a real system, the first 16k is a `secure boot rom' */
diff --git a/hw/arm/fsl-imx6.c b/hw/arm/fsl-imx6.c
index f58c85aa8c..17593485b7 100644
--- a/hw/arm/fsl-imx6.c
+++ b/hw/arm/fsl-imx6.c
@@ -43,74 +43,63 @@ static void fsl_imx6_init(Object *obj)
 
     for (i = 0; i < MIN(ms->smp.cpus, FSL_IMX6_NUM_CPUS); i++) {
         snprintf(name, NAME_SIZE, "cpu%d", i);
-        object_initialize_child(obj, name, &s->cpu[i], sizeof(s->cpu[i]),
-                                ARM_CPU_TYPE_NAME("cortex-a9"),
-                                &error_abort, NULL);
+        object_initialize_child(obj, name, &s->cpu[i],
+                                ARM_CPU_TYPE_NAME("cortex-a9"));
     }
 
-    sysbus_init_child_obj(obj, "a9mpcore", &s->a9mpcore, sizeof(s->a9mpcore),
-                          TYPE_A9MPCORE_PRIV);
+    object_initialize_child(obj, "a9mpcore", &s->a9mpcore, TYPE_A9MPCORE_PRIV);
 
-    sysbus_init_child_obj(obj, "ccm", &s->ccm, sizeof(s->ccm), TYPE_IMX6_CCM);
+    object_initialize_child(obj, "ccm", &s->ccm, TYPE_IMX6_CCM);
 
-    sysbus_init_child_obj(obj, "src", &s->src, sizeof(s->src), TYPE_IMX6_SRC);
+    object_initialize_child(obj, "src", &s->src, TYPE_IMX6_SRC);
 
     for (i = 0; i < FSL_IMX6_NUM_UARTS; i++) {
         snprintf(name, NAME_SIZE, "uart%d", i + 1);
-        sysbus_init_child_obj(obj, name, &s->uart[i], sizeof(s->uart[i]),
-                              TYPE_IMX_SERIAL);
+        object_initialize_child(obj, name, &s->uart[i], TYPE_IMX_SERIAL);
     }
 
-    sysbus_init_child_obj(obj, "gpt", &s->gpt, sizeof(s->gpt), TYPE_IMX6_GPT);
+    object_initialize_child(obj, "gpt", &s->gpt, TYPE_IMX6_GPT);
 
     for (i = 0; i < FSL_IMX6_NUM_EPITS; i++) {
         snprintf(name, NAME_SIZE, "epit%d", i + 1);
-        sysbus_init_child_obj(obj, name, &s->epit[i], sizeof(s->epit[i]),
-                              TYPE_IMX_EPIT);
+        object_initialize_child(obj, name, &s->epit[i], TYPE_IMX_EPIT);
     }
 
     for (i = 0; i < FSL_IMX6_NUM_I2CS; i++) {
         snprintf(name, NAME_SIZE, "i2c%d", i + 1);
-        sysbus_init_child_obj(obj, name, &s->i2c[i], sizeof(s->i2c[i]),
-                              TYPE_IMX_I2C);
+        object_initialize_child(obj, name, &s->i2c[i], TYPE_IMX_I2C);
     }
 
     for (i = 0; i < FSL_IMX6_NUM_GPIOS; i++) {
         snprintf(name, NAME_SIZE, "gpio%d", i + 1);
-        sysbus_init_child_obj(obj, name, &s->gpio[i], sizeof(s->gpio[i]),
-                              TYPE_IMX_GPIO);
+        object_initialize_child(obj, name, &s->gpio[i], TYPE_IMX_GPIO);
     }
 
     for (i = 0; i < FSL_IMX6_NUM_ESDHCS; i++) {
         snprintf(name, NAME_SIZE, "sdhc%d", i + 1);
-        sysbus_init_child_obj(obj, name, &s->esdhc[i], sizeof(s->esdhc[i]),
-                              TYPE_IMX_USDHC);
+        object_initialize_child(obj, name, &s->esdhc[i], TYPE_IMX_USDHC);
     }
 
     for (i = 0; i < FSL_IMX6_NUM_USB_PHYS; i++) {
         snprintf(name, NAME_SIZE, "usbphy%d", i);
-        sysbus_init_child_obj(obj, name, &s->usbphy[i], sizeof(s->usbphy[i]),
-                              TYPE_IMX_USBPHY);
+        object_initialize_child(obj, name, &s->usbphy[i], TYPE_IMX_USBPHY);
     }
     for (i = 0; i < FSL_IMX6_NUM_USBS; i++) {
         snprintf(name, NAME_SIZE, "usb%d", i);
-        sysbus_init_child_obj(obj, name, &s->usb[i], sizeof(s->usb[i]),
-                              TYPE_CHIPIDEA);
+        object_initialize_child(obj, name, &s->usb[i], TYPE_CHIPIDEA);
     }
 
     for (i = 0; i < FSL_IMX6_NUM_ECSPIS; i++) {
         snprintf(name, NAME_SIZE, "spi%d", i + 1);
-        sysbus_init_child_obj(obj, name, &s->spi[i], sizeof(s->spi[i]),
-                              TYPE_IMX_SPI);
+        object_initialize_child(obj, name, &s->spi[i], TYPE_IMX_SPI);
     }
     for (i = 0; i < FSL_IMX6_NUM_WDTS; i++) {
         snprintf(name, NAME_SIZE, "wdt%d", i);
-        sysbus_init_child_obj(obj, name, &s->wdt[i], sizeof(s->wdt[i]),
-                              TYPE_IMX2_WDT);
+        object_initialize_child(obj, name, &s->wdt[i], TYPE_IMX2_WDT);
     }
 
 
-    sysbus_init_child_obj(obj, "eth", &s->eth, sizeof(s->eth), TYPE_IMX_ENET);
+    object_initialize_child(obj, "eth", &s->eth, TYPE_IMX_ENET);
 }
 
 static void fsl_imx6_realize(DeviceState *dev, Error **errp)
@@ -141,7 +130,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
                                      "start-powered-off", &error_abort);
         }
 
-        object_property_set_bool(OBJECT(&s->cpu[i]), true, "realized", &err);
+        qdev_realize(DEVICE(&s->cpu[i]), NULL, &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -155,7 +144,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
                             FSL_IMX6_MAX_IRQ + GIC_INTERNAL, "num-irq",
                             &error_abort);
 
-    object_property_set_bool(OBJECT(&s->a9mpcore), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->a9mpcore), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -169,14 +158,14 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
                            qdev_get_gpio_in(DEVICE(&s->cpu[i]), ARM_CPU_FIQ));
     }
 
-    object_property_set_bool(OBJECT(&s->ccm), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->ccm), &err);
     if (err) {
         error_propagate(errp, err);
         return;
     }
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->ccm), 0, FSL_IMX6_CCM_ADDR);
 
-    object_property_set_bool(OBJECT(&s->src), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->src), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -198,7 +187,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
 
         qdev_prop_set_chr(DEVICE(&s->uart[i]), "chardev", serial_hd(i));
 
-        object_property_set_bool(OBJECT(&s->uart[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->uart[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -212,7 +201,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
 
     s->gpt.ccm = IMX_CCM(&s->ccm);
 
-    object_property_set_bool(OBJECT(&s->gpt), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gpt), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -235,7 +224,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
 
         s->epit[i].ccm = IMX_CCM(&s->ccm);
 
-        object_property_set_bool(OBJECT(&s->epit[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->epit[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -258,7 +247,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
             { FSL_IMX6_I2C3_ADDR, FSL_IMX6_I2C3_IRQ }
         };
 
-        object_property_set_bool(OBJECT(&s->i2c[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->i2c[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -318,7 +307,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
                                  &error_abort);
         object_property_set_bool(OBJECT(&s->gpio[i]), true, "has-upper-pin-irq",
                                  &error_abort);
-        object_property_set_bool(OBJECT(&s->gpio[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -350,7 +339,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
                                  &err);
         object_property_set_uint(OBJECT(&s->esdhc[i]), IMX6_ESDHC_CAPABILITIES,
                                  "capareg", &err);
-        object_property_set_bool(OBJECT(&s->esdhc[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->esdhc[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -363,8 +352,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
 
     /* USB */
     for (i = 0; i < FSL_IMX6_NUM_USB_PHYS; i++) {
-        object_property_set_bool(OBJECT(&s->usbphy[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->usbphy[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->usbphy[i]), 0,
                         FSL_IMX6_USBPHY1_ADDR + i * 0x1000);
     }
@@ -376,8 +364,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
             FSL_IMX6_USB_HOST3_IRQ,
         };
 
-        object_property_set_bool(OBJECT(&s->usb[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->usb[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->usb[i]), 0,
                         FSL_IMX6_USBOH3_USB_ADDR + i * 0x200);
         sysbus_connect_irq(SYS_BUS_DEVICE(&s->usb[i]), 0,
@@ -399,7 +386,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
         };
 
         /* Initialize the SPI */
-        object_property_set_bool(OBJECT(&s->spi[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -412,7 +399,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
     }
 
     qdev_set_nic_properties(DEVICE(&s->eth), &nd_table[0]);
-    object_property_set_bool(OBJECT(&s->eth), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->eth), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -440,8 +427,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
 
         object_property_set_bool(OBJECT(&s->wdt[i]), true, "pretimeout-support",
                                  &error_abort);
-        object_property_set_bool(OBJECT(&s->wdt[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0, FSL_IMX6_WDOGn_ADDR[i]);
         sysbus_connect_irq(SYS_BUS_DEVICE(&s->wdt[i]), 0,
diff --git a/hw/arm/fsl-imx6ul.c b/hw/arm/fsl-imx6ul.c
index 3ecb212da6..f8c564033e 100644
--- a/hw/arm/fsl-imx6ul.c
+++ b/hw/arm/fsl-imx6ul.c
@@ -34,50 +34,46 @@ static void fsl_imx6ul_init(Object *obj)
     char name[NAME_SIZE];
     int i;
 
-    object_initialize_child(obj, "cpu0", &s->cpu, sizeof(s->cpu),
-                            ARM_CPU_TYPE_NAME("cortex-a7"), &error_abort, NULL);
+    object_initialize_child(obj, "cpu0", &s->cpu,
+                            ARM_CPU_TYPE_NAME("cortex-a7"));
 
     /*
      * A7MPCORE
      */
-    sysbus_init_child_obj(obj, "a7mpcore", &s->a7mpcore, sizeof(s->a7mpcore),
-                          TYPE_A15MPCORE_PRIV);
+    object_initialize_child(obj, "a7mpcore", &s->a7mpcore,
+                            TYPE_A15MPCORE_PRIV);
 
     /*
      * CCM
      */
-    sysbus_init_child_obj(obj, "ccm", &s->ccm, sizeof(s->ccm), TYPE_IMX6UL_CCM);
+    object_initialize_child(obj, "ccm", &s->ccm, TYPE_IMX6UL_CCM);
 
     /*
      * SRC
      */
-    sysbus_init_child_obj(obj, "src", &s->src, sizeof(s->src), TYPE_IMX6_SRC);
+    object_initialize_child(obj, "src", &s->src, TYPE_IMX6_SRC);
 
     /*
      * GPCv2
      */
-    sysbus_init_child_obj(obj, "gpcv2", &s->gpcv2, sizeof(s->gpcv2),
-                          TYPE_IMX_GPCV2);
+    object_initialize_child(obj, "gpcv2", &s->gpcv2, TYPE_IMX_GPCV2);
 
     /*
      * SNVS
      */
-    sysbus_init_child_obj(obj, "snvs", &s->snvs, sizeof(s->snvs),
-                          TYPE_IMX7_SNVS);
+    object_initialize_child(obj, "snvs", &s->snvs, TYPE_IMX7_SNVS);
 
     /*
      * GPR
      */
-    sysbus_init_child_obj(obj, "gpr", &s->gpr, sizeof(s->gpr),
-                          TYPE_IMX7_GPR);
+    object_initialize_child(obj, "gpr", &s->gpr, TYPE_IMX7_GPR);
 
     /*
      * GPIOs 1 to 5
      */
     for (i = 0; i < FSL_IMX6UL_NUM_GPIOS; i++) {
         snprintf(name, NAME_SIZE, "gpio%d", i);
-        sysbus_init_child_obj(obj, name, &s->gpio[i], sizeof(s->gpio[i]),
-                              TYPE_IMX_GPIO);
+        object_initialize_child(obj, name, &s->gpio[i], TYPE_IMX_GPIO);
     }
 
     /*
@@ -85,8 +81,7 @@ static void fsl_imx6ul_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX6UL_NUM_GPTS; i++) {
         snprintf(name, NAME_SIZE, "gpt%d", i);
-        sysbus_init_child_obj(obj, name, &s->gpt[i], sizeof(s->gpt[i]),
-                              TYPE_IMX7_GPT);
+        object_initialize_child(obj, name, &s->gpt[i], TYPE_IMX7_GPT);
     }
 
     /*
@@ -94,8 +89,7 @@ static void fsl_imx6ul_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX6UL_NUM_EPITS; i++) {
         snprintf(name, NAME_SIZE, "epit%d", i + 1);
-        sysbus_init_child_obj(obj, name, &s->epit[i], sizeof(s->epit[i]),
-                              TYPE_IMX_EPIT);
+        object_initialize_child(obj, name, &s->epit[i], TYPE_IMX_EPIT);
     }
 
     /*
@@ -103,8 +97,7 @@ static void fsl_imx6ul_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX6UL_NUM_ECSPIS; i++) {
         snprintf(name, NAME_SIZE, "spi%d", i + 1);
-        sysbus_init_child_obj(obj, name, &s->spi[i], sizeof(s->spi[i]),
-                              TYPE_IMX_SPI);
+        object_initialize_child(obj, name, &s->spi[i], TYPE_IMX_SPI);
     }
 
     /*
@@ -112,8 +105,7 @@ static void fsl_imx6ul_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX6UL_NUM_I2CS; i++) {
         snprintf(name, NAME_SIZE, "i2c%d", i + 1);
-        sysbus_init_child_obj(obj, name, &s->i2c[i], sizeof(s->i2c[i]),
-                              TYPE_IMX_I2C);
+        object_initialize_child(obj, name, &s->i2c[i], TYPE_IMX_I2C);
     }
 
     /*
@@ -121,8 +113,7 @@ static void fsl_imx6ul_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX6UL_NUM_UARTS; i++) {
         snprintf(name, NAME_SIZE, "uart%d", i);
-        sysbus_init_child_obj(obj, name, &s->uart[i], sizeof(s->uart[i]),
-                              TYPE_IMX_SERIAL);
+        object_initialize_child(obj, name, &s->uart[i], TYPE_IMX_SERIAL);
     }
 
     /*
@@ -130,20 +121,17 @@ static void fsl_imx6ul_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX6UL_NUM_ETHS; i++) {
         snprintf(name, NAME_SIZE, "eth%d", i);
-        sysbus_init_child_obj(obj, name, &s->eth[i], sizeof(s->eth[i]),
-                              TYPE_IMX_ENET);
+        object_initialize_child(obj, name, &s->eth[i], TYPE_IMX_ENET);
     }
 
     /* USB */
     for (i = 0; i < FSL_IMX6UL_NUM_USB_PHYS; i++) {
         snprintf(name, NAME_SIZE, "usbphy%d", i);
-        sysbus_init_child_obj(obj, name, &s->usbphy[i], sizeof(s->usbphy[i]),
-                              TYPE_IMX_USBPHY);
+        object_initialize_child(obj, name, &s->usbphy[i], TYPE_IMX_USBPHY);
     }
     for (i = 0; i < FSL_IMX6UL_NUM_USBS; i++) {
         snprintf(name, NAME_SIZE, "usb%d", i);
-        sysbus_init_child_obj(obj, name, &s->usb[i], sizeof(s->usb[i]),
-                              TYPE_CHIPIDEA);
+        object_initialize_child(obj, name, &s->usb[i], TYPE_CHIPIDEA);
     }
 
     /*
@@ -151,8 +139,7 @@ static void fsl_imx6ul_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX6UL_NUM_USDHCS; i++) {
         snprintf(name, NAME_SIZE, "usdhc%d", i);
-        sysbus_init_child_obj(obj, name, &s->usdhc[i], sizeof(s->usdhc[i]),
-                              TYPE_IMX_USDHC);
+        object_initialize_child(obj, name, &s->usdhc[i], TYPE_IMX_USDHC);
     }
 
     /*
@@ -160,8 +147,7 @@ static void fsl_imx6ul_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX6UL_NUM_WDTS; i++) {
         snprintf(name, NAME_SIZE, "wdt%d", i);
-        sysbus_init_child_obj(obj, name, &s->wdt[i], sizeof(s->wdt[i]),
-                              TYPE_IMX2_WDT);
+        object_initialize_child(obj, name, &s->wdt[i], TYPE_IMX2_WDT);
     }
 }
 
@@ -182,8 +168,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
 
     object_property_set_int(OBJECT(&s->cpu), QEMU_PSCI_CONDUIT_SMC,
                             "psci-conduit", &error_abort);
-    object_property_set_bool(OBJECT(&s->cpu), true,
-                             "realized", &error_abort);
+    qdev_realize(DEVICE(&s->cpu), NULL, &error_abort);
 
     /*
      * A7MPCORE
@@ -192,8 +177,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
     object_property_set_int(OBJECT(&s->a7mpcore),
                             FSL_IMX6UL_MAX_IRQ + GIC_INTERNAL,
                             "num-irq", &error_abort);
-    object_property_set_bool(OBJECT(&s->a7mpcore), true, "realized",
-                             &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->a7mpcore), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->a7mpcore), 0, FSL_IMX6UL_A7MPCORE_ADDR);
 
     sbd = SYS_BUS_DEVICE(&s->a7mpcore);
@@ -225,8 +209,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
         };
 
         s->gpt[i].ccm = IMX_CCM(&s->ccm);
-        object_property_set_bool(OBJECT(&s->gpt[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->gpt[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpt[i]), 0,
                         FSL_IMX6UL_GPTn_ADDR[i]);
@@ -251,8 +234,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
         };
 
         s->epit[i].ccm = IMX_CCM(&s->ccm);
-        object_property_set_bool(OBJECT(&s->epit[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->epit[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->epit[i]), 0,
                         FSL_IMX6UL_EPITn_ADDR[i]);
@@ -290,8 +272,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
             FSL_IMX6UL_GPIO5_HIGH_IRQ,
         };
 
-        object_property_set_bool(OBJECT(&s->gpio[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpio[i]), 0,
                         FSL_IMX6UL_GPIOn_ADDR[i]);
@@ -321,20 +302,19 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
     /*
      * CCM
      */
-    object_property_set_bool(OBJECT(&s->ccm), true, "realized", &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->ccm), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->ccm), 0, FSL_IMX6UL_CCM_ADDR);
 
     /*
      * SRC
      */
-    object_property_set_bool(OBJECT(&s->src), true, "realized", &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->src), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->src), 0, FSL_IMX6UL_SRC_ADDR);
 
     /*
      * GPCv2
      */
-    object_property_set_bool(OBJECT(&s->gpcv2), true,
-                             "realized", &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gpcv2), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpcv2), 0, FSL_IMX6UL_GPC_ADDR);
 
     /* Initialize all ECSPI */
@@ -354,8 +334,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
         };
 
         /* Initialize the SPI */
-        object_property_set_bool(OBJECT(&s->spi[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->spi[i]), 0,
                         FSL_IMX6UL_SPIn_ADDR[i]);
@@ -383,8 +362,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
             FSL_IMX6UL_I2C4_IRQ,
         };
 
-        object_property_set_bool(OBJECT(&s->i2c[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->i2c[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->i2c[i]), 0, FSL_IMX6UL_I2Cn_ADDR[i]);
 
         sysbus_connect_irq(SYS_BUS_DEVICE(&s->i2c[i]), 0,
@@ -420,8 +398,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
 
         qdev_prop_set_chr(DEVICE(&s->uart[i]), "chardev", serial_hd(i));
 
-        object_property_set_bool(OBJECT(&s->uart[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->uart[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->uart[i]), 0,
                         FSL_IMX6UL_UARTn_ADDR[i]);
@@ -454,8 +431,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
                                  FSL_IMX6UL_ETH_NUM_TX_RINGS,
                                  "tx-ring-num", &error_abort);
         qdev_set_nic_properties(DEVICE(&s->eth[i]), &nd_table[i]);
-        object_property_set_bool(OBJECT(&s->eth[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->eth[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->eth[i]), 0,
                         FSL_IMX6UL_ENETn_ADDR[i]);
@@ -471,8 +447,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
 
     /* USB */
     for (i = 0; i < FSL_IMX6UL_NUM_USB_PHYS; i++) {
-        object_property_set_bool(OBJECT(&s->usbphy[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->usbphy[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->usbphy[i]), 0,
                         FSL_IMX6UL_USBPHY1_ADDR + i * 0x1000);
     }
@@ -482,8 +457,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
             FSL_IMX6UL_USB1_IRQ,
             FSL_IMX6UL_USB2_IRQ,
         };
-        object_property_set_bool(OBJECT(&s->usb[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->usb[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->usb[i]), 0,
                         FSL_IMX6UL_USBO2_USB_ADDR + i * 0x200);
         sysbus_connect_irq(SYS_BUS_DEVICE(&s->usb[i]), 0,
@@ -505,8 +479,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
             FSL_IMX6UL_USDHC2_IRQ,
         };
 
-        object_property_set_bool(OBJECT(&s->usdhc[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->usdhc[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->usdhc[i]), 0,
                         FSL_IMX6UL_USDHCn_ADDR[i]);
@@ -519,7 +492,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
     /*
      * SNVS
      */
-    object_property_set_bool(OBJECT(&s->snvs), true, "realized", &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->snvs), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->snvs), 0, FSL_IMX6UL_SNVS_HP_ADDR);
 
     /*
@@ -539,8 +512,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
 
         object_property_set_bool(OBJECT(&s->wdt[i]), true, "pretimeout-support",
                                  &error_abort);
-        object_property_set_bool(OBJECT(&s->wdt[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0,
                         FSL_IMX6UL_WDOGn_ADDR[i]);
@@ -552,8 +524,7 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
     /*
      * GPR
      */
-    object_property_set_bool(OBJECT(&s->gpr), true, "realized",
-                             &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gpr), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpr), 0, FSL_IMX6UL_IOMUXC_GPR_ADDR);
 
     /*
diff --git a/hw/arm/fsl-imx7.c b/hw/arm/fsl-imx7.c
index 89c3b64c06..ca8b5cc358 100644
--- a/hw/arm/fsl-imx7.c
+++ b/hw/arm/fsl-imx7.c
@@ -38,24 +38,22 @@ static void fsl_imx7_init(Object *obj)
 
     for (i = 0; i < MIN(ms->smp.cpus, FSL_IMX7_NUM_CPUS); i++) {
         snprintf(name, NAME_SIZE, "cpu%d", i);
-        object_initialize_child(obj, name, &s->cpu[i], sizeof(s->cpu[i]),
-                                ARM_CPU_TYPE_NAME("cortex-a7"), &error_abort,
-                                NULL);
+        object_initialize_child(obj, name, &s->cpu[i],
+                                ARM_CPU_TYPE_NAME("cortex-a7"));
     }
 
     /*
      * A7MPCORE
      */
-    sysbus_init_child_obj(obj, "a7mpcore", &s->a7mpcore, sizeof(s->a7mpcore),
-                          TYPE_A15MPCORE_PRIV);
+    object_initialize_child(obj, "a7mpcore", &s->a7mpcore,
+                            TYPE_A15MPCORE_PRIV);
 
     /*
      * GPIOs 1 to 7
      */
     for (i = 0; i < FSL_IMX7_NUM_GPIOS; i++) {
         snprintf(name, NAME_SIZE, "gpio%d", i);
-        sysbus_init_child_obj(obj, name, &s->gpio[i], sizeof(s->gpio[i]),
-                          TYPE_IMX_GPIO);
+        object_initialize_child(obj, name, &s->gpio[i], TYPE_IMX_GPIO);
     }
 
     /*
@@ -63,38 +61,33 @@ static void fsl_imx7_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX7_NUM_GPTS; i++) {
         snprintf(name, NAME_SIZE, "gpt%d", i);
-        sysbus_init_child_obj(obj, name, &s->gpt[i], sizeof(s->gpt[i]),
-                              TYPE_IMX7_GPT);
+        object_initialize_child(obj, name, &s->gpt[i], TYPE_IMX7_GPT);
     }
 
     /*
      * CCM
      */
-    sysbus_init_child_obj(obj, "ccm", &s->ccm, sizeof(s->ccm), TYPE_IMX7_CCM);
+    object_initialize_child(obj, "ccm", &s->ccm, TYPE_IMX7_CCM);
 
     /*
      * Analog
      */
-    sysbus_init_child_obj(obj, "analog", &s->analog, sizeof(s->analog),
-                          TYPE_IMX7_ANALOG);
+    object_initialize_child(obj, "analog", &s->analog, TYPE_IMX7_ANALOG);
 
     /*
      * GPCv2
      */
-    sysbus_init_child_obj(obj, "gpcv2", &s->gpcv2, sizeof(s->gpcv2),
-                          TYPE_IMX_GPCV2);
+    object_initialize_child(obj, "gpcv2", &s->gpcv2, TYPE_IMX_GPCV2);
 
     for (i = 0; i < FSL_IMX7_NUM_ECSPIS; i++) {
         snprintf(name, NAME_SIZE, "spi%d", i + 1);
-        sysbus_init_child_obj(obj, name, &s->spi[i], sizeof(s->spi[i]),
-                              TYPE_IMX_SPI);
+        object_initialize_child(obj, name, &s->spi[i], TYPE_IMX_SPI);
     }
 
 
     for (i = 0; i < FSL_IMX7_NUM_I2CS; i++) {
         snprintf(name, NAME_SIZE, "i2c%d", i + 1);
-        sysbus_init_child_obj(obj, name, &s->i2c[i], sizeof(s->i2c[i]),
-                              TYPE_IMX_I2C);
+        object_initialize_child(obj, name, &s->i2c[i], TYPE_IMX_I2C);
     }
 
     /*
@@ -102,8 +95,7 @@ static void fsl_imx7_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX7_NUM_UARTS; i++) {
             snprintf(name, NAME_SIZE, "uart%d", i);
-            sysbus_init_child_obj(obj, name, &s->uart[i], sizeof(s->uart[i]),
-                                  TYPE_IMX_SERIAL);
+            object_initialize_child(obj, name, &s->uart[i], TYPE_IMX_SERIAL);
     }
 
     /*
@@ -111,8 +103,7 @@ static void fsl_imx7_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX7_NUM_ETHS; i++) {
             snprintf(name, NAME_SIZE, "eth%d", i);
-            sysbus_init_child_obj(obj, name, &s->eth[i], sizeof(s->eth[i]),
-                                  TYPE_IMX_ENET);
+            object_initialize_child(obj, name, &s->eth[i], TYPE_IMX_ENET);
     }
 
     /*
@@ -120,37 +111,32 @@ static void fsl_imx7_init(Object *obj)
      */
     for (i = 0; i < FSL_IMX7_NUM_USDHCS; i++) {
             snprintf(name, NAME_SIZE, "usdhc%d", i);
-            sysbus_init_child_obj(obj, name, &s->usdhc[i], sizeof(s->usdhc[i]),
-                              TYPE_IMX_USDHC);
+            object_initialize_child(obj, name, &s->usdhc[i], TYPE_IMX_USDHC);
     }
 
     /*
      * SNVS
      */
-    sysbus_init_child_obj(obj, "snvs", &s->snvs, sizeof(s->snvs),
-                          TYPE_IMX7_SNVS);
+    object_initialize_child(obj, "snvs", &s->snvs, TYPE_IMX7_SNVS);
 
     /*
      * Watchdog
      */
     for (i = 0; i < FSL_IMX7_NUM_WDTS; i++) {
             snprintf(name, NAME_SIZE, "wdt%d", i);
-            sysbus_init_child_obj(obj, name, &s->wdt[i], sizeof(s->wdt[i]),
-                                  TYPE_IMX2_WDT);
+            object_initialize_child(obj, name, &s->wdt[i], TYPE_IMX2_WDT);
     }
 
     /*
      * GPR
      */
-    sysbus_init_child_obj(obj, "gpr", &s->gpr, sizeof(s->gpr), TYPE_IMX7_GPR);
+    object_initialize_child(obj, "gpr", &s->gpr, TYPE_IMX7_GPR);
 
-    sysbus_init_child_obj(obj, "pcie", &s->pcie, sizeof(s->pcie),
-                          TYPE_DESIGNWARE_PCIE_HOST);
+    object_initialize_child(obj, "pcie", &s->pcie, TYPE_DESIGNWARE_PCIE_HOST);
 
     for (i = 0; i < FSL_IMX7_NUM_USBS; i++) {
         snprintf(name, NAME_SIZE, "usb%d", i);
-        sysbus_init_child_obj(obj, name, &s->usb[i], sizeof(s->usb[i]),
-                              TYPE_CHIPIDEA);
+        object_initialize_child(obj, name, &s->usb[i], TYPE_CHIPIDEA);
     }
 }
 
@@ -188,7 +174,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
                                      "start-powered-off", &error_abort);
         }
 
-        object_property_set_bool(o, true, "realized", &error_abort);
+        qdev_realize(DEVICE(o), NULL, &error_abort);
     }
 
     /*
@@ -200,8 +186,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
                             FSL_IMX7_MAX_IRQ + GIC_INTERNAL,
                             "num-irq", &error_abort);
 
-    object_property_set_bool(OBJECT(&s->a7mpcore), true, "realized",
-                             &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->a7mpcore), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->a7mpcore), 0, FSL_IMX7_A7MPCORE_ADDR);
 
     for (i = 0; i < smp_cpus; i++) {
@@ -236,8 +221,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
         };
 
         s->gpt[i].ccm = IMX_CCM(&s->ccm);
-        object_property_set_bool(OBJECT(&s->gpt[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->gpt[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpt[i]), 0, FSL_IMX7_GPTn_ADDR[i]);
     }
 
@@ -252,8 +236,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
             FSL_IMX7_GPIO7_ADDR,
         };
 
-        object_property_set_bool(OBJECT(&s->gpio[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpio[i]), 0, FSL_IMX7_GPIOn_ADDR[i]);
     }
 
@@ -274,21 +257,19 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
     /*
      * CCM
      */
-    object_property_set_bool(OBJECT(&s->ccm), true, "realized", &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->ccm), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->ccm), 0, FSL_IMX7_CCM_ADDR);
 
     /*
      * Analog
      */
-    object_property_set_bool(OBJECT(&s->analog), true, "realized",
-                             &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->analog), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->analog), 0, FSL_IMX7_ANALOG_ADDR);
 
     /*
      * GPCv2
      */
-    object_property_set_bool(OBJECT(&s->gpcv2), true,
-                             "realized", &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gpcv2), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpcv2), 0, FSL_IMX7_GPC_ADDR);
 
     /* Initialize all ECSPI */
@@ -308,8 +289,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
         };
 
         /* Initialize the SPI */
-        object_property_set_bool(OBJECT(&s->spi[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->spi[i]), 0,
                         FSL_IMX7_SPIn_ADDR[i]);
         sysbus_connect_irq(SYS_BUS_DEVICE(&s->spi[i]), 0,
@@ -332,8 +312,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
             FSL_IMX7_I2C4_IRQ,
         };
 
-        object_property_set_bool(OBJECT(&s->i2c[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->i2c[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->i2c[i]), 0, FSL_IMX7_I2Cn_ADDR[i]);
 
         sysbus_connect_irq(SYS_BUS_DEVICE(&s->i2c[i]), 0,
@@ -368,8 +347,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
 
         qdev_prop_set_chr(DEVICE(&s->uart[i]), "chardev", serial_hd(i));
 
-        object_property_set_bool(OBJECT(&s->uart[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->uart[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->uart[i]), 0, FSL_IMX7_UARTn_ADDR[i]);
 
@@ -389,8 +367,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
         object_property_set_uint(OBJECT(&s->eth[i]), FSL_IMX7_ETH_NUM_TX_RINGS,
                                  "tx-ring-num", &error_abort);
         qdev_set_nic_properties(DEVICE(&s->eth[i]), &nd_table[i]);
-        object_property_set_bool(OBJECT(&s->eth[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->eth[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->eth[i]), 0, FSL_IMX7_ENETn_ADDR[i]);
 
@@ -416,8 +393,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
             FSL_IMX7_USDHC3_IRQ,
         };
 
-        object_property_set_bool(OBJECT(&s->usdhc[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->usdhc[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->usdhc[i]), 0,
                         FSL_IMX7_USDHCn_ADDR[i]);
@@ -429,7 +405,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
     /*
      * SNVS
      */
-    object_property_set_bool(OBJECT(&s->snvs), true, "realized", &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->snvs), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->snvs), 0, FSL_IMX7_SNVS_ADDR);
 
     /*
@@ -456,8 +432,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
 
         object_property_set_bool(OBJECT(&s->wdt[i]), true, "pretimeout-support",
                                  &error_abort);
-        object_property_set_bool(OBJECT(&s->wdt[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0, FSL_IMX7_WDOGn_ADDR[i]);
         sysbus_connect_irq(SYS_BUS_DEVICE(&s->wdt[i]), 0,
@@ -495,12 +470,10 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
     create_unimplemented_device("ocotp", FSL_IMX7_OCOTP_ADDR,
                                 FSL_IMX7_OCOTP_SIZE);
 
-    object_property_set_bool(OBJECT(&s->gpr), true, "realized",
-                             &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gpr), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpr), 0, FSL_IMX7_GPR_ADDR);
 
-    object_property_set_bool(OBJECT(&s->pcie), true,
-                             "realized", &error_abort);
+    sysbus_realize(SYS_BUS_DEVICE(&s->pcie), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->pcie), 0, FSL_IMX7_PCIE_REG_ADDR);
 
     irq = qdev_get_gpio_in(DEVICE(&s->a7mpcore), FSL_IMX7_PCI_INTA_IRQ);
@@ -532,8 +505,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
             FSL_IMX7_USB3_IRQ,
         };
 
-        object_property_set_bool(OBJECT(&s->usb[i]), true, "realized",
-                                 &error_abort);
+        sysbus_realize(SYS_BUS_DEVICE(&s->usb[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->usb[i]), 0,
                         FSL_IMX7_USBn_ADDR[i]);
 
diff --git a/hw/arm/highbank.c b/hw/arm/highbank.c
index ac9de9411e..c7ef48ecde 100644
--- a/hw/arm/highbank.c
+++ b/hw/arm/highbank.c
@@ -280,7 +280,7 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
             object_property_set_int(cpuobj, MPCORE_PERIPHBASE,
                                     "reset-cbar", &error_abort);
         }
-        object_property_set_bool(cpuobj, true, "realized", &error_fatal);
+        qdev_realize(DEVICE(cpuobj), NULL, &error_fatal);
         cpu_irq[n] = qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_IRQ);
         cpu_fiq[n] = qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_FIQ);
         cpu_virq[n] = qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_VIRQ);
@@ -311,21 +311,21 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
 
     switch (machine_id) {
     case CALXEDA_HIGHBANK:
-        dev = qdev_create(NULL, "l2x0");
-        qdev_init_nofail(dev);
+        dev = qdev_new("l2x0");
         busdev = SYS_BUS_DEVICE(dev);
+        sysbus_realize_and_unref(busdev, &error_fatal);
         sysbus_mmio_map(busdev, 0, 0xfff12000);
 
-        dev = qdev_create(NULL, TYPE_A9MPCORE_PRIV);
+        dev = qdev_new(TYPE_A9MPCORE_PRIV);
         break;
     case CALXEDA_MIDWAY:
-        dev = qdev_create(NULL, TYPE_A15MPCORE_PRIV);
+        dev = qdev_new(TYPE_A15MPCORE_PRIV);
         break;
     }
     qdev_prop_set_uint32(dev, "num-cpu", smp_cpus);
     qdev_prop_set_uint32(dev, "num-irq", NIRQ_GIC);
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, MPCORE_PERIPHBASE);
     for (n = 0; n < smp_cpus; n++) {
         sysbus_connect_irq(busdev, n, cpu_irq[n]);
@@ -338,18 +338,18 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
         pic[n] = qdev_get_gpio_in(dev, n);
     }
 
-    dev = qdev_create(NULL, "sp804");
+    dev = qdev_new("sp804");
     qdev_prop_set_uint32(dev, "freq0", 150000000);
     qdev_prop_set_uint32(dev, "freq1", 150000000);
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, 0xfff34000);
     sysbus_connect_irq(busdev, 0, pic[18]);
     pl011_create(0xfff36000, pic[20], serial_hd(0));
 
-    dev = qdev_create(NULL, TYPE_HIGHBANK_REGISTERS);
-    qdev_init_nofail(dev);
+    dev = qdev_new(TYPE_HIGHBANK_REGISTERS);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, 0xfff3c000);
 
     sysbus_create_simple("pl061", 0xfff30000, pic[14]);
@@ -363,18 +363,18 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
 
     if (nd_table[0].used) {
         qemu_check_nic_model(&nd_table[0], "xgmac");
-        dev = qdev_create(NULL, "xgmac");
+        dev = qdev_new("xgmac");
         qdev_set_nic_properties(dev, &nd_table[0]);
-        qdev_init_nofail(dev);
+        sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
         sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xfff50000);
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, pic[77]);
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), 1, pic[78]);
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), 2, pic[79]);
 
         qemu_check_nic_model(&nd_table[1], "xgmac");
-        dev = qdev_create(NULL, "xgmac");
+        dev = qdev_new("xgmac");
         qdev_set_nic_properties(dev, &nd_table[1]);
-        qdev_init_nofail(dev);
+        sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
         sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xfff51000);
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, pic[80]);
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), 1, pic[81]);
diff --git a/hw/arm/imx25_pdk.c b/hw/arm/imx25_pdk.c
index b3ca82bafa..af8f7f969c 100644
--- a/hw/arm/imx25_pdk.c
+++ b/hw/arm/imx25_pdk.c
@@ -73,10 +73,9 @@ static void imx25_pdk_init(MachineState *machine)
     unsigned int alias_offset;
     int i;
 
-    object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
-                            TYPE_FSL_IMX25, &error_abort, NULL);
+    object_initialize_child(OBJECT(machine), "soc", &s->soc, TYPE_FSL_IMX25);
 
-    object_property_set_bool(OBJECT(&s->soc), true, "realized", &error_fatal);
+    qdev_realize(DEVICE(&s->soc), NULL, &error_fatal);
 
     /* We need to initialize our memory */
     if (machine->ram_size > (FSL_IMX25_SDRAM0_SIZE + FSL_IMX25_SDRAM1_SIZE)) {
@@ -130,10 +129,9 @@ static void imx25_pdk_init(MachineState *machine)
         di = drive_get_next(IF_SD);
         blk = di ? blk_by_legacy_dinfo(di) : NULL;
         bus = qdev_get_child_bus(DEVICE(&s->soc.esdhc[i]), "sd-bus");
-        carddev = qdev_create(bus, TYPE_SD_CARD);
+        carddev = qdev_new(TYPE_SD_CARD);
         qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
-        object_property_set_bool(OBJECT(carddev), true,
-                                 "realized", &error_fatal);
+        qdev_realize_and_unref(carddev, bus, &error_fatal);
     }
 
     /*
diff --git a/hw/arm/integratorcp.c b/hw/arm/integratorcp.c
index 5fb54e5aa7..b11a846355 100644
--- a/hw/arm/integratorcp.c
+++ b/hw/arm/integratorcp.c
@@ -607,7 +607,7 @@ static void integratorcp_init(MachineState *machine)
         object_property_set_bool(cpuobj, false, "has_el3", &error_fatal);
     }
 
-    object_property_set_bool(cpuobj, true, "realized", &error_fatal);
+    qdev_realize(DEVICE(cpuobj), NULL, &error_fatal);
 
     cpu = ARM_CPU(cpuobj);
 
@@ -620,9 +620,9 @@ static void integratorcp_init(MachineState *machine)
                              0, ram_size);
     memory_region_add_subregion(address_space_mem, 0x80000000, ram_alias);
 
-    dev = qdev_create(NULL, TYPE_INTEGRATOR_CM);
+    dev = qdev_new(TYPE_INTEGRATOR_CM);
     qdev_prop_set_uint32(dev, "memsz", ram_size >> 20);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map((SysBusDevice *)dev, 0, 0x10000000);
 
     dev = sysbus_create_varargs(TYPE_INTEGRATOR_PIC, 0x14000000,
diff --git a/hw/arm/kzm.c b/hw/arm/kzm.c
index 34f6bcb491..e3f7d4ead2 100644
--- a/hw/arm/kzm.c
+++ b/hw/arm/kzm.c
@@ -71,10 +71,9 @@ static void kzm_init(MachineState *machine)
     unsigned int alias_offset;
     unsigned int i;
 
-    object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
-                            TYPE_FSL_IMX31, &error_abort, NULL);
+    object_initialize_child(OBJECT(machine), "soc", &s->soc, TYPE_FSL_IMX31);
 
-    object_property_set_bool(OBJECT(&s->soc), true, "realized", &error_fatal);
+    qdev_realize(DEVICE(&s->soc), NULL, &error_fatal);
 
     /* Check the amount of memory is compatible with the SOC */
     if (machine->ram_size > (FSL_IMX31_SDRAM0_SIZE + FSL_IMX31_SDRAM1_SIZE)) {
diff --git a/hw/arm/mcimx6ul-evk.c b/hw/arm/mcimx6ul-evk.c
index 5b5f23a6d4..3d1d2e3c04 100644
--- a/hw/arm/mcimx6ul-evk.c
+++ b/hw/arm/mcimx6ul-evk.c
@@ -40,7 +40,7 @@ static void mcimx6ul_evk_init(MachineState *machine)
 
     s = FSL_IMX6UL(object_new(TYPE_FSL_IMX6UL));
     object_property_add_child(OBJECT(machine), "soc", OBJECT(s));
-    object_property_set_bool(OBJECT(s), true, "realized", &error_fatal);
+    qdev_realize(DEVICE(s), NULL, &error_fatal);
 
     memory_region_add_subregion(get_system_memory(), FSL_IMX6UL_MMDC_ADDR,
                                 machine->ram);
@@ -54,10 +54,9 @@ static void mcimx6ul_evk_init(MachineState *machine)
         di = drive_get_next(IF_SD);
         blk = di ? blk_by_legacy_dinfo(di) : NULL;
         bus = qdev_get_child_bus(DEVICE(&s->usdhc[i]), "sd-bus");
-        carddev = qdev_create(bus, TYPE_SD_CARD);
+        carddev = qdev_new(TYPE_SD_CARD);
         qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
-        object_property_set_bool(OBJECT(carddev), true,
-                                 "realized", &error_fatal);
+        qdev_realize_and_unref(carddev, bus, &error_fatal);
     }
 
     if (!qtest_enabled()) {
diff --git a/hw/arm/mcimx7d-sabre.c b/hw/arm/mcimx7d-sabre.c
index 3851cd9e3e..365f8183bc 100644
--- a/hw/arm/mcimx7d-sabre.c
+++ b/hw/arm/mcimx7d-sabre.c
@@ -42,7 +42,7 @@ static void mcimx7d_sabre_init(MachineState *machine)
 
     s = FSL_IMX7(object_new(TYPE_FSL_IMX7));
     object_property_add_child(OBJECT(machine), "soc", OBJECT(s));
-    object_property_set_bool(OBJECT(s), true, "realized", &error_fatal);
+    qdev_realize(DEVICE(s), NULL, &error_fatal);
 
     memory_region_add_subregion(get_system_memory(), FSL_IMX7_MMDC_ADDR,
                                 machine->ram);
@@ -56,10 +56,9 @@ static void mcimx7d_sabre_init(MachineState *machine)
         di = drive_get_next(IF_SD);
         blk = di ? blk_by_legacy_dinfo(di) : NULL;
         bus = qdev_get_child_bus(DEVICE(&s->usdhc[i]), "sd-bus");
-        carddev = qdev_create(bus, TYPE_SD_CARD);
+        carddev = qdev_new(TYPE_SD_CARD);
         qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
-        object_property_set_bool(OBJECT(carddev), true,
-                                 "realized", &error_fatal);
+        qdev_realize_and_unref(carddev, bus, &error_fatal);
     }
 
     if (!qtest_enabled()) {
diff --git a/hw/arm/microbit.c b/hw/arm/microbit.c
index ef213695bd..8fe42c9d6a 100644
--- a/hw/arm/microbit.c
+++ b/hw/arm/microbit.c
@@ -36,30 +36,28 @@ static void microbit_init(MachineState *machine)
     MicrobitMachineState *s = MICROBIT_MACHINE(machine);
     MemoryRegion *system_memory = get_system_memory();
     MemoryRegion *mr;
-    Object *soc = OBJECT(&s->nrf51);
-    Object *i2c = OBJECT(&s->i2c);
 
-    sysbus_init_child_obj(OBJECT(machine), "nrf51", soc, sizeof(s->nrf51),
-                          TYPE_NRF51_SOC);
+    object_initialize_child(OBJECT(machine), "nrf51", &s->nrf51,
+                            TYPE_NRF51_SOC);
     qdev_prop_set_chr(DEVICE(&s->nrf51), "serial0", serial_hd(0));
-    object_property_set_link(soc, OBJECT(system_memory), "memory",
-                             &error_fatal);
-    object_property_set_bool(soc, true, "realized", &error_fatal);
+    object_property_set_link(OBJECT(&s->nrf51), OBJECT(system_memory),
+                             "memory", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(&s->nrf51), &error_fatal);
 
     /*
      * Overlap the TWI stub device into the SoC.  This is a microbit-specific
      * hack until we implement the nRF51 TWI controller properly and the
      * magnetometer/accelerometer devices.
      */
-    sysbus_init_child_obj(OBJECT(machine), "microbit.twi", i2c,
-                          sizeof(s->i2c), TYPE_MICROBIT_I2C);
-    object_property_set_bool(i2c, true, "realized", &error_fatal);
-    mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(i2c), 0);
+    object_initialize_child(OBJECT(machine), "microbit.twi", &s->i2c,
+                            TYPE_MICROBIT_I2C);
+    sysbus_realize(SYS_BUS_DEVICE(&s->i2c), &error_fatal);
+    mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->i2c), 0);
     memory_region_add_subregion_overlap(&s->nrf51.container, NRF51_TWI_BASE,
                                         mr, -1);
 
     armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
-                       NRF51_SOC(soc)->flash_size);
+                       s->nrf51.flash_size);
 }
 
 static void microbit_machine_class_init(ObjectClass *oc, void *data)
diff --git a/hw/arm/mps2-tz.c b/hw/arm/mps2-tz.c
index 2c43041564..8155c35418 100644
--- a/hw/arm/mps2-tz.c
+++ b/hw/arm/mps2-tz.c
@@ -174,12 +174,10 @@ static MemoryRegion *make_unimp_dev(MPS2TZMachineState *mms,
      */
     UnimplementedDeviceState *uds = opaque;
 
-    sysbus_init_child_obj(OBJECT(mms), name, uds,
-                          sizeof(UnimplementedDeviceState),
-                          TYPE_UNIMPLEMENTED_DEVICE);
+    object_initialize_child(OBJECT(mms), name, uds, TYPE_UNIMPLEMENTED_DEVICE);
     qdev_prop_set_string(DEVICE(uds), "name", name);
     qdev_prop_set_uint64(DEVICE(uds), "size", size);
-    object_property_set_bool(OBJECT(uds), true, "realized", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(uds), &error_fatal);
     return sysbus_mmio_get_region(SYS_BUS_DEVICE(uds), 0);
 }
 
@@ -194,11 +192,10 @@ static MemoryRegion *make_uart(MPS2TZMachineState *mms, void *opaque,
     SysBusDevice *s;
     DeviceState *orgate_dev = DEVICE(&mms->uart_irq_orgate);
 
-    sysbus_init_child_obj(OBJECT(mms), name, uart, sizeof(mms->uart[0]),
-                          TYPE_CMSDK_APB_UART);
+    object_initialize_child(OBJECT(mms), name, uart, TYPE_CMSDK_APB_UART);
     qdev_prop_set_chr(DEVICE(uart), "chardev", serial_hd(i));
     qdev_prop_set_uint32(DEVICE(uart), "pclk-frq", SYSCLK_FRQ);
-    object_property_set_bool(OBJECT(uart), true, "realized", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(uart), &error_fatal);
     s = SYS_BUS_DEVICE(uart);
     sysbus_connect_irq(s, 0, get_sse_irq_in(mms, txirqno));
     sysbus_connect_irq(s, 1, get_sse_irq_in(mms, rxirqno));
@@ -215,13 +212,12 @@ static MemoryRegion *make_scc(MPS2TZMachineState *mms, void *opaque,
     DeviceState *sccdev;
     MPS2TZMachineClass *mmc = MPS2TZ_MACHINE_GET_CLASS(mms);
 
-    sysbus_init_child_obj(OBJECT(mms), "scc", scc,
-                          sizeof(mms->scc), TYPE_MPS2_SCC);
+    object_initialize_child(OBJECT(mms), "scc", scc, TYPE_MPS2_SCC);
     sccdev = DEVICE(scc);
     qdev_prop_set_uint32(sccdev, "scc-cfg4", 0x2);
     qdev_prop_set_uint32(sccdev, "scc-aid", 0x00200008);
     qdev_prop_set_uint32(sccdev, "scc-id", mmc->scc_id);
-    object_property_set_bool(OBJECT(scc), true, "realized", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(scc), &error_fatal);
     return sysbus_mmio_get_region(SYS_BUS_DEVICE(sccdev), 0);
 }
 
@@ -230,9 +226,8 @@ static MemoryRegion *make_fpgaio(MPS2TZMachineState *mms, void *opaque,
 {
     MPS2FPGAIO *fpgaio = opaque;
 
-    sysbus_init_child_obj(OBJECT(mms), "fpgaio", fpgaio,
-                          sizeof(mms->fpgaio), TYPE_MPS2_FPGAIO);
-    object_property_set_bool(OBJECT(fpgaio), true, "realized", &error_fatal);
+    object_initialize_child(OBJECT(mms), "fpgaio", fpgaio, TYPE_MPS2_FPGAIO);
+    sysbus_realize(SYS_BUS_DEVICE(fpgaio), &error_fatal);
     return sysbus_mmio_get_region(SYS_BUS_DEVICE(fpgaio), 0);
 }
 
@@ -246,11 +241,11 @@ static MemoryRegion *make_eth_dev(MPS2TZMachineState *mms, void *opaque,
      * except that it doesn't support the checksum-offload feature.
      */
     qemu_check_nic_model(nd, "lan9118");
-    mms->lan9118 = qdev_create(NULL, TYPE_LAN9118);
+    mms->lan9118 = qdev_new(TYPE_LAN9118);
     qdev_set_nic_properties(mms->lan9118, nd);
-    qdev_init_nofail(mms->lan9118);
 
     s = SYS_BUS_DEVICE(mms->lan9118);
+    sysbus_realize_and_unref(s, &error_fatal);
     sysbus_connect_irq(s, 0, get_sse_irq_in(mms, 16));
     return sysbus_mmio_get_region(s, 0);
 }
@@ -268,11 +263,10 @@ static MemoryRegion *make_mpc(MPS2TZMachineState *mms, void *opaque,
 
     memory_region_init_ram(ssram, NULL, name, ramsize[i], &error_fatal);
 
-    sysbus_init_child_obj(OBJECT(mms), mpcname, mpc, sizeof(mms->ssram_mpc[0]),
-                          TYPE_TZ_MPC);
+    object_initialize_child(OBJECT(mms), mpcname, mpc, TYPE_TZ_MPC);
     object_property_set_link(OBJECT(mpc), OBJECT(ssram),
                              "downstream", &error_fatal);
-    object_property_set_bool(OBJECT(mpc), true, "realized", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(mpc), &error_fatal);
     /* Map the upstream end of the MPC into system memory */
     upstream = sysbus_mmio_get_region(SYS_BUS_DEVICE(mpc), 1);
     memory_region_add_subregion(get_system_memory(), rambase[i], upstream);
@@ -311,13 +305,13 @@ static MemoryRegion *make_dma(MPS2TZMachineState *mms, void *opaque,
      * the MSC connects to the IoTKit AHB Slave Expansion port, so the
      * DMA devices can see all devices and memory that the CPU does.
      */
-    sysbus_init_child_obj(OBJECT(mms), mscname, msc, sizeof(*msc), TYPE_TZ_MSC);
+    object_initialize_child(OBJECT(mms), mscname, msc, TYPE_TZ_MSC);
     msc_downstream = sysbus_mmio_get_region(SYS_BUS_DEVICE(&mms->iotkit), 0);
     object_property_set_link(OBJECT(msc), OBJECT(msc_downstream),
                              "downstream", &error_fatal);
     object_property_set_link(OBJECT(msc), OBJECT(mms),
                              "idau", &error_fatal);
-    object_property_set_bool(OBJECT(msc), true, "realized", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(msc), &error_fatal);
 
     qdev_connect_gpio_out_named(DEVICE(msc), "irq", 0,
                                 qdev_get_gpio_in_named(iotkitdev,
@@ -334,10 +328,10 @@ static MemoryRegion *make_dma(MPS2TZMachineState *mms, void *opaque,
                                                  "cfg_sec_resp", 0));
     msc_upstream = sysbus_mmio_get_region(SYS_BUS_DEVICE(msc), 0);
 
-    sysbus_init_child_obj(OBJECT(mms), name, dma, sizeof(*dma), TYPE_PL081);
+    object_initialize_child(OBJECT(mms), name, dma, TYPE_PL081);
     object_property_set_link(OBJECT(dma), OBJECT(msc_upstream),
                              "downstream", &error_fatal);
-    object_property_set_bool(OBJECT(dma), true, "realized", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(dma), &error_fatal);
 
     s = SYS_BUS_DEVICE(dma);
     /* Wire up DMACINTR, DMACINTERR, DMACINTTC */
@@ -364,9 +358,8 @@ static MemoryRegion *make_spi(MPS2TZMachineState *mms, void *opaque,
     int i = spi - &mms->spi[0];
     SysBusDevice *s;
 
-    sysbus_init_child_obj(OBJECT(mms), name, spi, sizeof(mms->spi[0]),
-                          TYPE_PL022);
-    object_property_set_bool(OBJECT(spi), true, "realized", &error_fatal);
+    object_initialize_child(OBJECT(mms), name, spi, TYPE_PL022);
+    sysbus_realize(SYS_BUS_DEVICE(spi), &error_fatal);
     s = SYS_BUS_DEVICE(spi);
     sysbus_connect_irq(s, 0, get_sse_irq_in(mms, 51 + i));
     return sysbus_mmio_get_region(s, 0);
@@ -395,15 +388,14 @@ static void mps2tz_common_init(MachineState *machine)
         exit(EXIT_FAILURE);
     }
 
-    sysbus_init_child_obj(OBJECT(machine), TYPE_IOTKIT, &mms->iotkit,
-                          sizeof(mms->iotkit), mmc->armsse_type);
+    object_initialize_child(OBJECT(machine), TYPE_IOTKIT, &mms->iotkit,
+                            mmc->armsse_type);
     iotkitdev = DEVICE(&mms->iotkit);
     object_property_set_link(OBJECT(&mms->iotkit), OBJECT(system_memory),
                              "memory", &error_abort);
     qdev_prop_set_uint32(iotkitdev, "EXP_NUMIRQ", MPS2TZ_NUMIRQ);
     qdev_prop_set_uint32(iotkitdev, "MAINCLK", SYSCLK_FRQ);
-    object_property_set_bool(OBJECT(&mms->iotkit), true, "realized",
-                             &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(&mms->iotkit), &error_fatal);
 
     /*
      * The AN521 needs us to create splitters to feed the IRQ inputs
@@ -414,15 +406,15 @@ static void mps2tz_common_init(MachineState *machine)
             char *name = g_strdup_printf("mps2-irq-splitter%d", i);
             SplitIRQ *splitter = &mms->cpu_irq_splitter[i];
 
-            object_initialize_child(OBJECT(machine), name,
-                                    splitter, sizeof(*splitter),
-                                    TYPE_SPLIT_IRQ, &error_fatal, NULL);
+            object_initialize_child_with_props(OBJECT(machine), name,
+                                               splitter, sizeof(*splitter),
+                                               TYPE_SPLIT_IRQ, &error_fatal,
+                                               NULL);
             g_free(name);
 
             object_property_set_int(OBJECT(splitter), 2, "num-lines",
                                     &error_fatal);
-            object_property_set_bool(OBJECT(splitter), true, "realized",
-                                     &error_fatal);
+            qdev_realize(DEVICE(splitter), NULL, &error_fatal);
             qdev_connect_gpio_out(DEVICE(splitter), 0,
                                   qdev_get_gpio_in_named(DEVICE(&mms->iotkit),
                                                          "EXP_IRQ", i));
@@ -436,14 +428,11 @@ static void mps2tz_common_init(MachineState *machine)
      * lines, one for each of the PPCs we create here, plus one per MSC.
      */
     object_initialize_child(OBJECT(machine), "sec-resp-splitter",
-                            &mms->sec_resp_splitter,
-                            sizeof(mms->sec_resp_splitter),
-                            TYPE_SPLIT_IRQ, &error_abort, NULL);
+                            &mms->sec_resp_splitter, TYPE_SPLIT_IRQ);
     object_property_set_int(OBJECT(&mms->sec_resp_splitter),
                             ARRAY_SIZE(mms->ppc) + ARRAY_SIZE(mms->msc),
                             "num-lines", &error_fatal);
-    object_property_set_bool(OBJECT(&mms->sec_resp_splitter), true,
-                             "realized", &error_fatal);
+    qdev_realize(DEVICE(&mms->sec_resp_splitter), NULL, &error_fatal);
     dev_splitter = DEVICE(&mms->sec_resp_splitter);
     qdev_connect_gpio_out_named(iotkitdev, "sec_resp_cfg", 0,
                                 qdev_get_gpio_in(dev_splitter, 0));
@@ -472,12 +461,10 @@ static void mps2tz_common_init(MachineState *machine)
      * Create the OR gate for this.
      */
     object_initialize_child(OBJECT(mms), "uart-irq-orgate",
-                            &mms->uart_irq_orgate, sizeof(mms->uart_irq_orgate),
-                            TYPE_OR_IRQ, &error_abort, NULL);
+                            &mms->uart_irq_orgate, TYPE_OR_IRQ);
     object_property_set_int(OBJECT(&mms->uart_irq_orgate), 10, "num-lines",
                             &error_fatal);
-    object_property_set_bool(OBJECT(&mms->uart_irq_orgate), true,
-                             "realized", &error_fatal);
+    qdev_realize(DEVICE(&mms->uart_irq_orgate), NULL, &error_fatal);
     qdev_connect_gpio_out(DEVICE(&mms->uart_irq_orgate), 0,
                           get_sse_irq_in(mms, 15));
 
@@ -553,8 +540,8 @@ static void mps2tz_common_init(MachineState *machine)
         int port;
         char *gpioname;
 
-        sysbus_init_child_obj(OBJECT(machine), ppcinfo->name, ppc,
-                              sizeof(TZPPC), TYPE_TZ_PPC);
+        object_initialize_child(OBJECT(machine), ppcinfo->name, ppc,
+                                TYPE_TZ_PPC);
         ppcdev = DEVICE(ppc);
 
         for (port = 0; port < TZ_NUM_PORTS; port++) {
@@ -573,7 +560,7 @@ static void mps2tz_common_init(MachineState *machine)
             g_free(portname);
         }
 
-        object_property_set_bool(OBJECT(ppc), true, "realized", &error_fatal);
+        sysbus_realize(SYS_BUS_DEVICE(ppc), &error_fatal);
 
         for (port = 0; port < TZ_NUM_PORTS; port++) {
             const PPCPortInfo *pinfo = &ppcinfo->ports[port];
diff --git a/hw/arm/mps2.c b/hw/arm/mps2.c
index f246213206..daa55f730b 100644
--- a/hw/arm/mps2.c
+++ b/hw/arm/mps2.c
@@ -180,8 +180,7 @@ static void mps2_common_init(MachineState *machine)
         g_assert_not_reached();
     }
 
-    sysbus_init_child_obj(OBJECT(mms), "armv7m", &mms->armv7m,
-                          sizeof(mms->armv7m), TYPE_ARMV7M);
+    object_initialize_child(OBJECT(mms), "armv7m", &mms->armv7m, TYPE_ARMV7M);
     armv7m = DEVICE(&mms->armv7m);
     switch (mmc->fpga_type) {
     case FPGA_AN385:
@@ -197,8 +196,7 @@ static void mps2_common_init(MachineState *machine)
     qdev_prop_set_bit(armv7m, "enable-bitband", true);
     object_property_set_link(OBJECT(&mms->armv7m), OBJECT(system_memory),
                              "memory", &error_abort);
-    object_property_set_bool(OBJECT(&mms->armv7m), true, "realized",
-                             &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(&mms->armv7m), &error_fatal);
 
     create_unimplemented_device("zbtsmram mirror", 0x00400000, 0x00400000);
     create_unimplemented_device("RESERVED 1", 0x00800000, 0x00800000);
@@ -231,7 +229,7 @@ static void mps2_common_init(MachineState *machine)
 
         orgate = object_new(TYPE_OR_IRQ);
         object_property_set_int(orgate, 6, "num-lines", &error_fatal);
-        object_property_set_bool(orgate, true, "realized", &error_fatal);
+        qdev_realize(DEVICE(orgate), NULL, &error_fatal);
         orgate_dev = DEVICE(orgate);
         qdev_connect_gpio_out(orgate_dev, 0, qdev_get_gpio_in(armv7m, 12));
 
@@ -268,7 +266,7 @@ static void mps2_common_init(MachineState *machine)
 
         orgate = object_new(TYPE_OR_IRQ);
         object_property_set_int(orgate, 10, "num-lines", &error_fatal);
-        object_property_set_bool(orgate, true, "realized", &error_fatal);
+        qdev_realize(DEVICE(orgate), NULL, &error_fatal);
         orgate_dev = DEVICE(orgate);
         qdev_connect_gpio_out(orgate_dev, 0, qdev_get_gpio_in(armv7m, 12));
 
@@ -283,8 +281,7 @@ static void mps2_common_init(MachineState *machine)
 
             txrx_orgate = object_new(TYPE_OR_IRQ);
             object_property_set_int(txrx_orgate, 2, "num-lines", &error_fatal);
-            object_property_set_bool(txrx_orgate, true, "realized",
-                                     &error_fatal);
+            qdev_realize(DEVICE(txrx_orgate), NULL, &error_fatal);
             txrx_orgate_dev = DEVICE(txrx_orgate);
             qdev_connect_gpio_out(txrx_orgate_dev, 0,
                                   qdev_get_gpio_in(armv7m, uart_txrx_irqno[i]));
@@ -305,23 +302,20 @@ static void mps2_common_init(MachineState *machine)
     cmsdk_apb_timer_create(0x40000000, qdev_get_gpio_in(armv7m, 8), SYSCLK_FRQ);
     cmsdk_apb_timer_create(0x40001000, qdev_get_gpio_in(armv7m, 9), SYSCLK_FRQ);
 
-    sysbus_init_child_obj(OBJECT(mms), "dualtimer", &mms->dualtimer,
-                          sizeof(mms->dualtimer), TYPE_CMSDK_APB_DUALTIMER);
+    object_initialize_child(OBJECT(mms), "dualtimer", &mms->dualtimer,
+                            TYPE_CMSDK_APB_DUALTIMER);
     qdev_prop_set_uint32(DEVICE(&mms->dualtimer), "pclk-frq", SYSCLK_FRQ);
-    object_property_set_bool(OBJECT(&mms->dualtimer), true, "realized",
-                             &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(&mms->dualtimer), &error_fatal);
     sysbus_connect_irq(SYS_BUS_DEVICE(&mms->dualtimer), 0,
                        qdev_get_gpio_in(armv7m, 10));
     sysbus_mmio_map(SYS_BUS_DEVICE(&mms->dualtimer), 0, 0x40002000);
 
-    sysbus_init_child_obj(OBJECT(mms), "scc", &mms->scc,
-                          sizeof(mms->scc), TYPE_MPS2_SCC);
+    object_initialize_child(OBJECT(mms), "scc", &mms->scc, TYPE_MPS2_SCC);
     sccdev = DEVICE(&mms->scc);
     qdev_prop_set_uint32(sccdev, "scc-cfg4", 0x2);
     qdev_prop_set_uint32(sccdev, "scc-aid", 0x00200008);
     qdev_prop_set_uint32(sccdev, "scc-id", mmc->scc_id);
-    object_property_set_bool(OBJECT(&mms->scc), true, "realized",
-                             &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(&mms->scc), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(sccdev), 0, 0x4002f000);
 
     /* In hardware this is a LAN9220; the LAN9118 is software compatible
diff --git a/hw/arm/msf2-soc.c b/hw/arm/msf2-soc.c
index f4579e5a08..3235c76194 100644
--- a/hw/arm/msf2-soc.c
+++ b/hw/arm/msf2-soc.c
@@ -71,22 +71,17 @@ static void m2sxxx_soc_initfn(Object *obj)
     MSF2State *s = MSF2_SOC(obj);
     int i;
 
-    sysbus_init_child_obj(obj, "armv7m", &s->armv7m, sizeof(s->armv7m),
-                          TYPE_ARMV7M);
+    object_initialize_child(obj, "armv7m", &s->armv7m, TYPE_ARMV7M);
 
-    sysbus_init_child_obj(obj, "sysreg", &s->sysreg, sizeof(s->sysreg),
-                          TYPE_MSF2_SYSREG);
+    object_initialize_child(obj, "sysreg", &s->sysreg, TYPE_MSF2_SYSREG);
 
-    sysbus_init_child_obj(obj, "timer", &s->timer, sizeof(s->timer),
-                          TYPE_MSS_TIMER);
+    object_initialize_child(obj, "timer", &s->timer, TYPE_MSS_TIMER);
 
     for (i = 0; i < MSF2_NUM_SPIS; i++) {
-        sysbus_init_child_obj(obj, "spi[*]", &s->spi[i], sizeof(s->spi[i]),
-                          TYPE_MSS_SPI);
+        object_initialize_child(obj, "spi[*]", &s->spi[i], TYPE_MSS_SPI);
     }
 
-    sysbus_init_child_obj(obj, "emac", &s->emac, sizeof(s->emac),
-                          TYPE_MSS_EMAC);
+    object_initialize_child(obj, "emac", &s->emac, TYPE_MSS_EMAC);
     if (nd_table[0].used) {
         qemu_check_nic_model(&nd_table[0], TYPE_MSS_EMAC);
         qdev_set_nic_properties(DEVICE(&s->emac), &nd_table[0]);
@@ -130,7 +125,7 @@ static void m2sxxx_soc_realize(DeviceState *dev_soc, Error **errp)
     qdev_prop_set_bit(armv7m, "enable-bitband", true);
     object_property_set_link(OBJECT(&s->armv7m), OBJECT(get_system_memory()),
                                      "memory", &error_abort);
-    object_property_set_bool(OBJECT(&s->armv7m), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -158,7 +153,7 @@ static void m2sxxx_soc_realize(DeviceState *dev_soc, Error **errp)
     dev = DEVICE(&s->timer);
     /* APB0 clock is the timer input clock */
     qdev_prop_set_uint32(dev, "clock-frequency", s->m3clk / s->apb0div);
-    object_property_set_bool(OBJECT(&s->timer), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->timer), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -173,7 +168,7 @@ static void m2sxxx_soc_realize(DeviceState *dev_soc, Error **errp)
     dev = DEVICE(&s->sysreg);
     qdev_prop_set_uint32(dev, "apb0divisor", s->apb0div);
     qdev_prop_set_uint32(dev, "apb1divisor", s->apb1div);
-    object_property_set_bool(OBJECT(&s->sysreg), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->sysreg), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -184,7 +179,7 @@ static void m2sxxx_soc_realize(DeviceState *dev_soc, Error **errp)
     for (i = 0; i < MSF2_NUM_SPIS; i++) {
         gchar *bus_name;
 
-        object_property_set_bool(OBJECT(&s->spi[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), &err);
         if (err != NULL) {
             error_propagate(errp, err);
             return;
@@ -204,7 +199,7 @@ static void m2sxxx_soc_realize(DeviceState *dev_soc, Error **errp)
     dev = DEVICE(&s->emac);
     object_property_set_link(OBJECT(&s->emac), OBJECT(get_system_memory()),
                              "ahb-bus", &error_abort);
-    object_property_set_bool(OBJECT(&s->emac), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->emac), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
diff --git a/hw/arm/msf2-som.c b/hw/arm/msf2-som.c
index dbd35b6def..355966c073 100644
--- a/hw/arm/msf2-som.c
+++ b/hw/arm/msf2-som.c
@@ -47,7 +47,7 @@ static void emcraft_sf2_s2s010_init(MachineState *machine)
     MachineClass *mc = MACHINE_GET_CLASS(machine);
     DriveInfo *dinfo = drive_get_next(IF_MTD);
     qemu_irq cs_line;
-    SSIBus *spi_bus;
+    BusState *spi_bus;
     MemoryRegion *sysmem = get_system_memory();
     MemoryRegion *ddr = g_new(MemoryRegion, 1);
 
@@ -61,7 +61,7 @@ static void emcraft_sf2_s2s010_init(MachineState *machine)
                            &error_fatal);
     memory_region_add_subregion(sysmem, DDR_BASE_ADDRESS, ddr);
 
-    dev = qdev_create(NULL, TYPE_MSF2_SOC);
+    dev = qdev_new(TYPE_MSF2_SOC);
     qdev_prop_set_string(dev, "part-name", "M2S010");
     qdev_prop_set_string(dev, "cpu-type", mc->default_cpu_type);
 
@@ -77,19 +77,19 @@ static void emcraft_sf2_s2s010_init(MachineState *machine)
     qdev_prop_set_uint32(dev, "apb0div", 2);
     qdev_prop_set_uint32(dev, "apb1div", 2);
 
-    object_property_set_bool(OBJECT(dev), true, "realized", &error_fatal);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     soc = MSF2_SOC(dev);
 
     /* Attach SPI flash to SPI0 controller */
-    spi_bus = (SSIBus *)qdev_get_child_bus(dev, "spi0");
-    spi_flash = ssi_create_slave_no_init(spi_bus, "s25sl12801");
+    spi_bus = qdev_get_child_bus(dev, "spi0");
+    spi_flash = qdev_new("s25sl12801");
     qdev_prop_set_uint8(spi_flash, "spansion-cr2nv", 1);
     if (dinfo) {
         qdev_prop_set_drive(spi_flash, "drive", blk_by_legacy_dinfo(dinfo),
                                     &error_fatal);
     }
-    qdev_init_nofail(spi_flash);
+    qdev_realize_and_unref(spi_flash, spi_bus, &error_fatal);
     cs_line = qdev_get_gpio_in_named(spi_flash, SSI_GPIO_CS, 0);
     sysbus_connect_irq(SYS_BUS_DEVICE(&soc->spi[0]), 1, cs_line);
 
diff --git a/hw/arm/musca.c b/hw/arm/musca.c
index ba99dd1941..34376328fc 100644
--- a/hw/arm/musca.c
+++ b/hw/arm/musca.c
@@ -142,12 +142,10 @@ static MemoryRegion *make_unimp_dev(MuscaMachineState *mms,
      */
     UnimplementedDeviceState *uds = opaque;
 
-    sysbus_init_child_obj(OBJECT(mms), name, uds,
-                          sizeof(UnimplementedDeviceState),
-                          TYPE_UNIMPLEMENTED_DEVICE);
+    object_initialize_child(OBJECT(mms), name, uds, TYPE_UNIMPLEMENTED_DEVICE);
     qdev_prop_set_string(DEVICE(uds), "name", name);
     qdev_prop_set_uint64(DEVICE(uds), "size", size);
-    object_property_set_bool(OBJECT(uds), true, "realized", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(uds), &error_fatal);
     return sysbus_mmio_get_region(SYS_BUS_DEVICE(uds), 0);
 }
 
@@ -246,23 +244,21 @@ static MemoryRegion *make_mpc(MuscaMachineState *mms, void *opaque,
     case MPC_CRYPTOISLAND:
         /* We don't implement the CryptoIsland yet */
         uds = &mms->cryptoisland;
-        sysbus_init_child_obj(OBJECT(mms), name, uds,
-                              sizeof(UnimplementedDeviceState),
-                              TYPE_UNIMPLEMENTED_DEVICE);
+        object_initialize_child(OBJECT(mms), name, uds,
+                                TYPE_UNIMPLEMENTED_DEVICE);
         qdev_prop_set_string(DEVICE(uds), "name", mpcinfo[i].name);
         qdev_prop_set_uint64(DEVICE(uds), "size", mpcinfo[i].size);
-        object_property_set_bool(OBJECT(uds), true, "realized", &error_fatal);
+        sysbus_realize(SYS_BUS_DEVICE(uds), &error_fatal);
         downstream = sysbus_mmio_get_region(SYS_BUS_DEVICE(uds), 0);
         break;
     default:
         g_assert_not_reached();
     }
 
-    sysbus_init_child_obj(OBJECT(mms), mpcname, mpc, sizeof(mms->mpc[0]),
-                          TYPE_TZ_MPC);
+    object_initialize_child(OBJECT(mms), mpcname, mpc, TYPE_TZ_MPC);
     object_property_set_link(OBJECT(mpc), OBJECT(downstream),
                              "downstream", &error_fatal);
-    object_property_set_bool(OBJECT(mpc), true, "realized", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(mpc), &error_fatal);
     /* Map the upstream end of the MPC into system memory */
     upstream = sysbus_mmio_get_region(SYS_BUS_DEVICE(mpc), 1);
     memory_region_add_subregion(get_system_memory(), mpcinfo[i].addr, upstream);
@@ -281,8 +277,8 @@ static MemoryRegion *make_rtc(MuscaMachineState *mms, void *opaque,
 {
     PL031State *rtc = opaque;
 
-    sysbus_init_child_obj(OBJECT(mms), name, rtc, sizeof(mms->rtc), TYPE_PL031);
-    object_property_set_bool(OBJECT(rtc), true, "realized", &error_fatal);
+    object_initialize_child(OBJECT(mms), name, rtc, TYPE_PL031);
+    sysbus_realize(SYS_BUS_DEVICE(rtc), &error_fatal);
     sysbus_connect_irq(SYS_BUS_DEVICE(rtc), 0, get_sse_irq_in(mms, 39));
     return sysbus_mmio_get_region(SYS_BUS_DEVICE(rtc), 0);
 }
@@ -295,10 +291,9 @@ static MemoryRegion *make_uart(MuscaMachineState *mms, void *opaque,
     int irqbase = 7 + i * 6;
     SysBusDevice *s;
 
-    sysbus_init_child_obj(OBJECT(mms), name, uart, sizeof(mms->uart[0]),
-                          TYPE_PL011);
+    object_initialize_child(OBJECT(mms), name, uart, TYPE_PL011);
     qdev_prop_set_chr(DEVICE(uart), "chardev", serial_hd(i));
-    object_property_set_bool(OBJECT(uart), true, "realized", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(uart), &error_fatal);
     s = SYS_BUS_DEVICE(uart);
     sysbus_connect_irq(s, 0, get_sse_irq_in(mms, irqbase + 5)); /* combined */
     sysbus_connect_irq(s, 1, get_sse_irq_in(mms, irqbase + 0)); /* RX */
@@ -376,8 +371,8 @@ static void musca_init(MachineState *machine)
         exit(1);
     }
 
-    sysbus_init_child_obj(OBJECT(machine), "sse-200", &mms->sse,
-                          sizeof(mms->sse), TYPE_SSE200);
+    object_initialize_child(OBJECT(machine), "sse-200", &mms->sse,
+                            TYPE_SSE200);
     ssedev = DEVICE(&mms->sse);
     object_property_set_link(OBJECT(&mms->sse), OBJECT(system_memory),
                              "memory", &error_fatal);
@@ -393,8 +388,7 @@ static void musca_init(MachineState *machine)
         qdev_prop_set_bit(ssedev, "CPU0_FPU", true);
         qdev_prop_set_bit(ssedev, "CPU0_DSP", true);
     }
-    object_property_set_bool(OBJECT(&mms->sse), true, "realized",
-                             &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(&mms->sse), &error_fatal);
 
     /*
      * We need to create splitters to feed the IRQ inputs
@@ -404,15 +398,14 @@ static void musca_init(MachineState *machine)
         char *name = g_strdup_printf("musca-irq-splitter%d", i);
         SplitIRQ *splitter = &mms->cpu_irq_splitter[i];
 
-        object_initialize_child(OBJECT(machine), name,
-                                splitter, sizeof(*splitter),
-                                TYPE_SPLIT_IRQ, &error_fatal, NULL);
+        object_initialize_child_with_props(OBJECT(machine), name, splitter,
+                                           sizeof(*splitter), TYPE_SPLIT_IRQ,
+                                           &error_fatal, NULL);
         g_free(name);
 
         object_property_set_int(OBJECT(splitter), 2, "num-lines",
                                 &error_fatal);
-        object_property_set_bool(OBJECT(splitter), true, "realized",
-                                 &error_fatal);
+        qdev_realize(DEVICE(splitter), NULL, &error_fatal);
         qdev_connect_gpio_out(DEVICE(splitter), 0,
                               qdev_get_gpio_in_named(ssedev, "EXP_IRQ", i));
         qdev_connect_gpio_out(DEVICE(splitter), 1,
@@ -424,15 +417,14 @@ static void musca_init(MachineState *machine)
      * The sec_resp_cfg output from the SSE-200 must be split into multiple
      * lines, one for each of the PPCs we create here.
      */
-    object_initialize_child(OBJECT(machine), "sec-resp-splitter",
-                            &mms->sec_resp_splitter,
-                            sizeof(mms->sec_resp_splitter),
-                            TYPE_SPLIT_IRQ, &error_fatal, NULL);
+    object_initialize_child_with_props(OBJECT(machine), "sec-resp-splitter",
+                                       &mms->sec_resp_splitter,
+                                       sizeof(mms->sec_resp_splitter),
+                                       TYPE_SPLIT_IRQ, &error_fatal, NULL);
 
     object_property_set_int(OBJECT(&mms->sec_resp_splitter),
                             ARRAY_SIZE(mms->ppc), "num-lines", &error_fatal);
-    object_property_set_bool(OBJECT(&mms->sec_resp_splitter), true,
-                             "realized", &error_fatal);
+    qdev_realize(DEVICE(&mms->sec_resp_splitter), NULL, &error_fatal);
     dev_splitter = DEVICE(&mms->sec_resp_splitter);
     qdev_connect_gpio_out_named(ssedev, "sec_resp_cfg", 0,
                                 qdev_get_gpio_in(dev_splitter, 0));
@@ -534,8 +526,8 @@ static void musca_init(MachineState *machine)
         int port;
         char *gpioname;
 
-        sysbus_init_child_obj(OBJECT(machine), ppcinfo->name, ppc,
-                              sizeof(TZPPC), TYPE_TZ_PPC);
+        object_initialize_child(OBJECT(machine), ppcinfo->name, ppc,
+                                TYPE_TZ_PPC);
         ppcdev = DEVICE(ppc);
 
         for (port = 0; port < TZ_NUM_PORTS; port++) {
@@ -554,7 +546,7 @@ static void musca_init(MachineState *machine)
             g_free(portname);
         }
 
-        object_property_set_bool(OBJECT(ppc), true, "realized", &error_fatal);
+        sysbus_realize(SYS_BUS_DEVICE(ppc), &error_fatal);
 
         for (port = 0; port < TZ_NUM_PORTS; port++) {
             const PPCPortInfo *pinfo = &ppcinfo->ports[port];
diff --git a/hw/arm/musicpal.c b/hw/arm/musicpal.c
index 92f33ed87e..394a3345bd 100644
--- a/hw/arm/musicpal.c
+++ b/hw/arm/musicpal.c
@@ -1651,9 +1651,9 @@ static void musicpal_init(MachineState *machine)
     sysbus_create_simple(TYPE_MV88W8618_FLASHCFG, MP_FLASHCFG_BASE, NULL);
 
     qemu_check_nic_model(&nd_table[0], "mv88w8618");
-    dev = qdev_create(NULL, TYPE_MV88W8618_ETH);
+    dev = qdev_new(TYPE_MV88W8618_ETH);
     qdev_set_nic_properties(dev, &nd_table[0]);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, MP_ETH_BASE);
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, pic[MP_ETH_IRQ]);
 
@@ -1688,11 +1688,11 @@ static void musicpal_init(MachineState *machine)
     }
 
     wm8750_dev = i2c_create_slave(i2c, TYPE_WM8750, MP_WM_ADDR);
-    dev = qdev_create(NULL, TYPE_MV88W8618_AUDIO);
+    dev = qdev_new(TYPE_MV88W8618_AUDIO);
     s = SYS_BUS_DEVICE(dev);
     object_property_set_link(OBJECT(dev), OBJECT(wm8750_dev),
                              "wm8750", NULL);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(s, &error_fatal);
     sysbus_mmio_map(s, 0, MP_AUDIO_BASE);
     sysbus_connect_irq(s, 0, pic[MP_AUDIO_IRQ]);
 
diff --git a/hw/arm/netduino2.c b/hw/arm/netduino2.c
index e770d9cac8..79e19392b5 100644
--- a/hw/arm/netduino2.c
+++ b/hw/arm/netduino2.c
@@ -34,9 +34,9 @@ static void netduino2_init(MachineState *machine)
 {
     DeviceState *dev;
 
-    dev = qdev_create(NULL, TYPE_STM32F205_SOC);
+    dev = qdev_new(TYPE_STM32F205_SOC);
     qdev_prop_set_string(dev, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m3"));
-    object_property_set_bool(OBJECT(dev), true, "realized", &error_fatal);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
                        FLASH_SIZE);
diff --git a/hw/arm/netduinoplus2.c b/hw/arm/netduinoplus2.c
index e5e247edbe..958d21dd9f 100644
--- a/hw/arm/netduinoplus2.c
+++ b/hw/arm/netduinoplus2.c
@@ -34,9 +34,9 @@ static void netduinoplus2_init(MachineState *machine)
 {
     DeviceState *dev;
 
-    dev = qdev_create(NULL, TYPE_STM32F405_SOC);
+    dev = qdev_new(TYPE_STM32F405_SOC);
     qdev_prop_set_string(dev, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m4"));
-    object_property_set_bool(OBJECT(dev), true, "realized", &error_fatal);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     armv7m_load_kernel(ARM_CPU(first_cpu),
                        machine->kernel_filename,
diff --git a/hw/arm/nrf51_soc.c b/hw/arm/nrf51_soc.c
index fe126581e4..5a8961ddbb 100644
--- a/hw/arm/nrf51_soc.c
+++ b/hw/arm/nrf51_soc.c
@@ -71,7 +71,7 @@ static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
         error_propagate(errp, err);
         return;
     }
-    object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->cpu), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -88,7 +88,7 @@ static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
     memory_region_add_subregion(&s->container, NRF51_SRAM_BASE, &s->sram);
 
     /* UART */
-    object_property_set_bool(OBJECT(&s->uart), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->uart), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -100,7 +100,7 @@ static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
                        BASE_TO_IRQ(NRF51_UART_BASE)));
 
     /* RNG */
-    object_property_set_bool(OBJECT(&s->rng), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->rng), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -120,7 +120,7 @@ static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
         return;
     }
 
-    object_property_set_bool(OBJECT(&s->nvm), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->nvm), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -136,7 +136,7 @@ static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
     memory_region_add_subregion_overlap(&s->container, NRF51_FLASH_BASE, mr, 0);
 
     /* GPIO */
-    object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gpio), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -155,7 +155,7 @@ static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
             error_propagate(errp, err);
             return;
         }
-        object_property_set_bool(OBJECT(&s->timer[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->timer[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -189,27 +189,23 @@ static void nrf51_soc_init(Object *obj)
 
     memory_region_init(&s->container, obj, "nrf51-container", UINT64_MAX);
 
-    sysbus_init_child_obj(OBJECT(s), "armv6m", OBJECT(&s->cpu), sizeof(s->cpu),
-                          TYPE_ARMV7M);
+    object_initialize_child(OBJECT(s), "armv6m", &s->cpu, TYPE_ARMV7M);
     qdev_prop_set_string(DEVICE(&s->cpu), "cpu-type",
                          ARM_CPU_TYPE_NAME("cortex-m0"));
     qdev_prop_set_uint32(DEVICE(&s->cpu), "num-irq", 32);
 
-    sysbus_init_child_obj(obj, "uart", &s->uart, sizeof(s->uart),
-                           TYPE_NRF51_UART);
+    object_initialize_child(obj, "uart", &s->uart, TYPE_NRF51_UART);
     object_property_add_alias(obj, "serial0", OBJECT(&s->uart), "chardev");
 
-    sysbus_init_child_obj(obj, "rng", &s->rng, sizeof(s->rng),
-                           TYPE_NRF51_RNG);
+    object_initialize_child(obj, "rng", &s->rng, TYPE_NRF51_RNG);
 
-    sysbus_init_child_obj(obj, "nvm", &s->nvm, sizeof(s->nvm), TYPE_NRF51_NVM);
+    object_initialize_child(obj, "nvm", &s->nvm, TYPE_NRF51_NVM);
 
-    sysbus_init_child_obj(obj, "gpio", &s->gpio, sizeof(s->gpio),
-                          TYPE_NRF51_GPIO);
+    object_initialize_child(obj, "gpio", &s->gpio, TYPE_NRF51_GPIO);
 
     for (i = 0; i < NRF51_NUM_TIMERS; i++) {
-        sysbus_init_child_obj(obj, "timer[*]", &s->timer[i],
-                              sizeof(s->timer[i]), TYPE_NRF51_TIMER);
+        object_initialize_child(obj, "timer[*]", &s->timer[i],
+                                TYPE_NRF51_TIMER);
 
     }
 }
diff --git a/hw/arm/nseries.c b/hw/arm/nseries.c
index eae800b5c1..02678dda2d 100644
--- a/hw/arm/nseries.c
+++ b/hw/arm/nseries.c
@@ -174,7 +174,7 @@ static void n8x0_nand_setup(struct n800_s *s)
     char *otp_region;
     DriveInfo *dinfo;
 
-    s->nand = qdev_create(NULL, "onenand");
+    s->nand = qdev_new("onenand");
     qdev_prop_set_uint16(s->nand, "manufacturer_id", NAND_MFR_SAMSUNG);
     /* Either 0x40 or 0x48 are OK for the device ID */
     qdev_prop_set_uint16(s->nand, "device_id", 0x48);
@@ -185,7 +185,7 @@ static void n8x0_nand_setup(struct n800_s *s)
         qdev_prop_set_drive(s->nand, "drive", blk_by_legacy_dinfo(dinfo),
                             &error_fatal);
     }
-    qdev_init_nofail(s->nand);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(s->nand), &error_fatal);
     sysbus_connect_irq(SYS_BUS_DEVICE(s->nand), 0,
                        qdev_get_gpio_in(s->mpu->gpio, N8X0_ONENAND_GPIO));
     omap_gpmc_attach(s->mpu->gpmc, N8X0_ONENAND_CS,
@@ -802,9 +802,9 @@ static void n8x0_uart_setup(struct n800_s *s)
 static void n8x0_usb_setup(struct n800_s *s)
 {
     SysBusDevice *dev;
-    s->usb = qdev_create(NULL, "tusb6010");
+    s->usb = qdev_new("tusb6010");
     dev = SYS_BUS_DEVICE(s->usb);
-    qdev_init_nofail(s->usb);
+    sysbus_realize_and_unref(dev, &error_fatal);
     sysbus_connect_irq(dev, 0,
                        qdev_get_gpio_in(s->mpu->gpio, N8X0_TUSB_INT_GPIO));
     /* Using the NOR interface */
diff --git a/hw/arm/omap1.c b/hw/arm/omap1.c
index 761cc17ea9..6ba0df6b6d 100644
--- a/hw/arm/omap1.c
+++ b/hw/arm/omap1.c
@@ -3887,21 +3887,21 @@ struct omap_mpu_state_s *omap310_mpu_init(MemoryRegion *dram,
 
     omap_clkm_init(system_memory, 0xfffece00, 0xe1008000, s);
 
-    s->ih[0] = qdev_create(NULL, "omap-intc");
+    s->ih[0] = qdev_new("omap-intc");
     qdev_prop_set_uint32(s->ih[0], "size", 0x100);
     omap_intc_set_iclk(OMAP_INTC(s->ih[0]), omap_findclk(s, "arminth_ck"));
-    qdev_init_nofail(s->ih[0]);
     busdev = SYS_BUS_DEVICE(s->ih[0]);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_connect_irq(busdev, 0,
                        qdev_get_gpio_in(DEVICE(s->cpu), ARM_CPU_IRQ));
     sysbus_connect_irq(busdev, 1,
                        qdev_get_gpio_in(DEVICE(s->cpu), ARM_CPU_FIQ));
     sysbus_mmio_map(busdev, 0, 0xfffecb00);
-    s->ih[1] = qdev_create(NULL, "omap-intc");
+    s->ih[1] = qdev_new("omap-intc");
     qdev_prop_set_uint32(s->ih[1], "size", 0x800);
     omap_intc_set_iclk(OMAP_INTC(s->ih[1]), omap_findclk(s, "arminth_ck"));
-    qdev_init_nofail(s->ih[1]);
     busdev = SYS_BUS_DEVICE(s->ih[1]);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_connect_irq(busdev, 0,
                        qdev_get_gpio_in(s->ih[0], OMAP_INT_15XX_IH2_IRQ));
     /* The second interrupt controller's FIQ output is not wired up */
@@ -4010,10 +4010,10 @@ struct omap_mpu_state_s *omap310_mpu_init(MemoryRegion *dram,
                                qdev_get_gpio_in(s->ih[1], OMAP_INT_MPUIO),
                                s->wakeup, omap_findclk(s, "clk32-kHz"));
 
-    s->gpio = qdev_create(NULL, "omap-gpio");
+    s->gpio = qdev_new("omap-gpio");
     qdev_prop_set_int32(s->gpio, "mpu_model", s->mpu_model);
     omap_gpio_set_clk(OMAP1_GPIO(s->gpio), omap_findclk(s, "arm_gpio_ck"));
-    qdev_init_nofail(s->gpio);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(s->gpio), &error_fatal);
     sysbus_connect_irq(SYS_BUS_DEVICE(s->gpio), 0,
                        qdev_get_gpio_in(s->ih[0], OMAP_INT_GPIO_BANK1));
     sysbus_mmio_map(SYS_BUS_DEVICE(s->gpio), 0, 0xfffce000);
@@ -4028,11 +4028,11 @@ struct omap_mpu_state_s *omap310_mpu_init(MemoryRegion *dram,
     s->pwt = omap_pwt_init(system_memory, 0xfffb6000,
                            omap_findclk(s, "armxor_ck"));
 
-    s->i2c[0] = qdev_create(NULL, "omap_i2c");
+    s->i2c[0] = qdev_new("omap_i2c");
     qdev_prop_set_uint8(s->i2c[0], "revision", 0x11);
     omap_i2c_set_fclk(OMAP_I2C(s->i2c[0]), omap_findclk(s, "mpuper_ck"));
-    qdev_init_nofail(s->i2c[0]);
     busdev = SYS_BUS_DEVICE(s->i2c[0]);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(s->ih[1], OMAP_INT_I2C));
     sysbus_connect_irq(busdev, 1, s->drq[OMAP_DMA_I2C_TX]);
     sysbus_connect_irq(busdev, 2, s->drq[OMAP_DMA_I2C_RX]);
diff --git a/hw/arm/omap2.c b/hw/arm/omap2.c
index e1c11de5ce..16d388fc79 100644
--- a/hw/arm/omap2.c
+++ b/hw/arm/omap2.c
@@ -2306,12 +2306,12 @@ struct omap_mpu_state_s *omap2420_mpu_init(MemoryRegion *sdram,
     s->l4 = omap_l4_init(sysmem, OMAP2_L4_BASE, 54);
 
     /* Actually mapped at any 2K boundary in the ARM11 private-peripheral if */
-    s->ih[0] = qdev_create(NULL, "omap2-intc");
+    s->ih[0] = qdev_new("omap2-intc");
     qdev_prop_set_uint8(s->ih[0], "revision", 0x21);
     omap_intc_set_fclk(OMAP_INTC(s->ih[0]), omap_findclk(s, "mpu_intc_fclk"));
     omap_intc_set_iclk(OMAP_INTC(s->ih[0]), omap_findclk(s, "mpu_intc_iclk"));
-    qdev_init_nofail(s->ih[0]);
     busdev = SYS_BUS_DEVICE(s->ih[0]);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_connect_irq(busdev, 0,
                        qdev_get_gpio_in(DEVICE(s->cpu), ARM_CPU_IRQ));
     sysbus_connect_irq(busdev, 1,
@@ -2423,31 +2423,31 @@ struct omap_mpu_state_s *omap2420_mpu_init(MemoryRegion *sdram,
                     omap_findclk(s, "clk32-kHz"),
                     omap_findclk(s, "core_l4_iclk"));
 
-    s->i2c[0] = qdev_create(NULL, "omap_i2c");
+    s->i2c[0] = qdev_new("omap_i2c");
     qdev_prop_set_uint8(s->i2c[0], "revision", 0x34);
     omap_i2c_set_iclk(OMAP_I2C(s->i2c[0]), omap_findclk(s, "i2c1.iclk"));
     omap_i2c_set_fclk(OMAP_I2C(s->i2c[0]), omap_findclk(s, "i2c1.fclk"));
-    qdev_init_nofail(s->i2c[0]);
     busdev = SYS_BUS_DEVICE(s->i2c[0]);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_connect_irq(busdev, 0,
                        qdev_get_gpio_in(s->ih[0], OMAP_INT_24XX_I2C1_IRQ));
     sysbus_connect_irq(busdev, 1, s->drq[OMAP24XX_DMA_I2C1_TX]);
     sysbus_connect_irq(busdev, 2, s->drq[OMAP24XX_DMA_I2C1_RX]);
     sysbus_mmio_map(busdev, 0, omap_l4_region_base(omap_l4tao(s->l4, 5), 0));
 
-    s->i2c[1] = qdev_create(NULL, "omap_i2c");
+    s->i2c[1] = qdev_new("omap_i2c");
     qdev_prop_set_uint8(s->i2c[1], "revision", 0x34);
     omap_i2c_set_iclk(OMAP_I2C(s->i2c[1]), omap_findclk(s, "i2c2.iclk"));
     omap_i2c_set_fclk(OMAP_I2C(s->i2c[1]), omap_findclk(s, "i2c2.fclk"));
-    qdev_init_nofail(s->i2c[1]);
     busdev = SYS_BUS_DEVICE(s->i2c[1]);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_connect_irq(busdev, 0,
                        qdev_get_gpio_in(s->ih[0], OMAP_INT_24XX_I2C2_IRQ));
     sysbus_connect_irq(busdev, 1, s->drq[OMAP24XX_DMA_I2C2_TX]);
     sysbus_connect_irq(busdev, 2, s->drq[OMAP24XX_DMA_I2C2_RX]);
     sysbus_mmio_map(busdev, 0, omap_l4_region_base(omap_l4tao(s->l4, 6), 0));
 
-    s->gpio = qdev_create(NULL, "omap2-gpio");
+    s->gpio = qdev_new("omap2-gpio");
     qdev_prop_set_int32(s->gpio, "mpu_model", s->mpu_model);
     omap2_gpio_set_iclk(OMAP2_GPIO(s->gpio), omap_findclk(s, "gpio_iclk"));
     omap2_gpio_set_fclk(OMAP2_GPIO(s->gpio), 0, omap_findclk(s, "gpio1_dbclk"));
@@ -2458,8 +2458,8 @@ struct omap_mpu_state_s *omap2420_mpu_init(MemoryRegion *sdram,
         omap2_gpio_set_fclk(OMAP2_GPIO(s->gpio), 4,
                             omap_findclk(s, "gpio5_dbclk"));
     }
-    qdev_init_nofail(s->gpio);
     busdev = SYS_BUS_DEVICE(s->gpio);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_connect_irq(busdev, 0,
                        qdev_get_gpio_in(s->ih[0], OMAP_INT_24XX_GPIO_BANK1));
     sysbus_connect_irq(busdev, 3,
diff --git a/hw/arm/orangepi.c b/hw/arm/orangepi.c
index b291715f27..678c93033e 100644
--- a/hw/arm/orangepi.c
+++ b/hw/arm/orangepi.c
@@ -86,7 +86,7 @@ static void orangepi_init(MachineState *machine)
                             &error_abort);
 
     /* Mark H3 object realized */
-    object_property_set_bool(OBJECT(h3), true, "realized", &error_abort);
+    qdev_realize(DEVICE(h3), NULL, &error_abort);
 
     /* Retrieve SD bus */
     di = drive_get_next(IF_SD);
@@ -94,9 +94,9 @@ static void orangepi_init(MachineState *machine)
     bus = qdev_get_child_bus(DEVICE(h3), "sd-bus");
 
     /* Plug in SD card */
-    carddev = qdev_create(bus, TYPE_SD_CARD);
+    carddev = qdev_new(TYPE_SD_CARD);
     qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
-    object_property_set_bool(OBJECT(carddev), true, "realized", &error_fatal);
+    qdev_realize_and_unref(carddev, bus, &error_fatal);
 
     /* SDRAM */
     memory_region_add_subregion(get_system_memory(), h3->memmap[AW_H3_SDRAM],
diff --git a/hw/arm/pxa2xx.c b/hw/arm/pxa2xx.c
index e649f8930c..f104a33463 100644
--- a/hw/arm/pxa2xx.c
+++ b/hw/arm/pxa2xx.c
@@ -1510,12 +1510,12 @@ PXA2xxI2CState *pxa2xx_i2c_init(hwaddr base,
     PXA2xxI2CState *s;
     I2CBus *i2cbus;
 
-    dev = qdev_create(NULL, TYPE_PXA2XX_I2C);
+    dev = qdev_new(TYPE_PXA2XX_I2C);
     qdev_prop_set_uint32(dev, "size", region_size + 1);
     qdev_prop_set_uint32(dev, "offset", base & region_size);
-    qdev_init_nofail(dev);
 
     i2c_dev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(i2c_dev, &error_fatal);
     sysbus_mmio_map(i2c_dev, 0, base & ~region_size);
     sysbus_connect_irq(i2c_dev, 0, irq);
 
@@ -2073,10 +2073,10 @@ static PXA2xxFIrState *pxa2xx_fir_init(MemoryRegion *sysmem,
     DeviceState *dev;
     SysBusDevice *sbd;
 
-    dev = qdev_create(NULL, TYPE_PXA2XX_FIR);
+    dev = qdev_new(TYPE_PXA2XX_FIR);
     qdev_prop_set_chr(dev, "chardev", chr);
-    qdev_init_nofail(dev);
     sbd = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(sbd, &error_fatal);
     sysbus_mmio_map(sbd, 0, base);
     sysbus_connect_irq(sbd, 0, irq);
     sysbus_connect_irq(sbd, 1, rx_dma);
diff --git a/hw/arm/pxa2xx_gpio.c b/hw/arm/pxa2xx_gpio.c
index a01db54a51..d6d0d0b08e 100644
--- a/hw/arm/pxa2xx_gpio.c
+++ b/hw/arm/pxa2xx_gpio.c
@@ -14,6 +14,7 @@
 #include "hw/sysbus.h"
 #include "migration/vmstate.h"
 #include "hw/arm/pxa.h"
+#include "qapi/error.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
 
@@ -269,10 +270,10 @@ DeviceState *pxa2xx_gpio_init(hwaddr base,
     CPUState *cs = CPU(cpu);
     DeviceState *dev;
 
-    dev = qdev_create(NULL, TYPE_PXA2XX_GPIO);
+    dev = qdev_new(TYPE_PXA2XX_GPIO);
     qdev_prop_set_int32(dev, "lines", lines);
     qdev_prop_set_int32(dev, "ncpu", cs->cpu_index);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
diff --git a/hw/arm/pxa2xx_pic.c b/hw/arm/pxa2xx_pic.c
index 203d4d28af..105c5e63f2 100644
--- a/hw/arm/pxa2xx_pic.c
+++ b/hw/arm/pxa2xx_pic.c
@@ -9,6 +9,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qapi/error.h"
 #include "qemu/module.h"
 #include "cpu.h"
 #include "hw/arm/pxa.h"
@@ -267,7 +268,7 @@ static int pxa2xx_pic_post_load(void *opaque, int version_id)
 
 DeviceState *pxa2xx_pic_init(hwaddr base, ARMCPU *cpu)
 {
-    DeviceState *dev = qdev_create(NULL, TYPE_PXA2XX_PIC);
+    DeviceState *dev = qdev_new(TYPE_PXA2XX_PIC);
     PXA2xxPICState *s = PXA2XX_PIC(dev);
 
     s->cpu = cpu;
@@ -279,7 +280,7 @@ DeviceState *pxa2xx_pic_init(hwaddr base, ARMCPU *cpu)
     s->is_fiq[0] = 0;
     s->is_fiq[1] = 0;
 
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     qdev_init_gpio_in(dev, pxa2xx_pic_set_irq, PXA2XX_PIC_SRCS);
 
diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c
index a2efe0b94d..380978fc27 100644
--- a/hw/arm/raspi.c
+++ b/hw/arm/raspi.c
@@ -282,12 +282,12 @@ static void raspi_machine_init(MachineState *machine)
                                         machine->ram, 0);
 
     /* Setup the SOC */
-    object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
-                            board_soc_type(board_rev), &error_abort, NULL);
+    object_initialize_child(OBJECT(machine), "soc", &s->soc,
+                            board_soc_type(board_rev));
     object_property_add_const_link(OBJECT(&s->soc), "ram", OBJECT(machine->ram));
     object_property_set_int(OBJECT(&s->soc), board_rev, "board-rev",
                             &error_abort);
-    object_property_set_bool(OBJECT(&s->soc), true, "realized", &error_abort);
+    qdev_realize(DEVICE(&s->soc), NULL, &error_abort);
 
     /* Create and plug in the SD cards */
     di = drive_get_next(IF_SD);
@@ -297,9 +297,9 @@ static void raspi_machine_init(MachineState *machine)
         error_report("No SD bus found in SOC object");
         exit(1);
     }
-    carddev = qdev_create(bus, TYPE_SD_CARD);
+    carddev = qdev_new(TYPE_SD_CARD);
     qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
-    object_property_set_bool(OBJECT(carddev), true, "realized", &error_fatal);
+    qdev_realize_and_unref(carddev, bus, &error_fatal);
 
     vcram_size = object_property_get_uint(OBJECT(&s->soc), "vcram-size",
                                           &error_abort);
diff --git a/hw/arm/realview.c b/hw/arm/realview.c
index 8fcdf75a2b..f3c00fe00c 100644
--- a/hw/arm/realview.c
+++ b/hw/arm/realview.c
@@ -114,7 +114,7 @@ static void realview_init(MachineState *machine,
                                     &error_fatal);
         }
 
-        object_property_set_bool(cpuobj, true, "realized", &error_fatal);
+        qdev_realize(DEVICE(cpuobj), NULL, &error_fatal);
 
         cpu_irq[n] = qdev_get_gpio_in(DEVICE(cpuobj), ARM_CPU_IRQ);
     }
@@ -161,17 +161,17 @@ static void realview_init(MachineState *machine,
     }
 
     sys_id = is_pb ? 0x01780500 : 0xc1400400;
-    sysctl = qdev_create(NULL, "realview_sysctl");
+    sysctl = qdev_new("realview_sysctl");
     qdev_prop_set_uint32(sysctl, "sys_id", sys_id);
     qdev_prop_set_uint32(sysctl, "proc_id", proc_id);
-    qdev_init_nofail(sysctl);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(sysctl), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(sysctl), 0, 0x10000000);
 
     if (is_mpcore) {
-        dev = qdev_create(NULL, is_pb ? TYPE_A9MPCORE_PRIV : "realview_mpcore");
+        dev = qdev_new(is_pb ? TYPE_A9MPCORE_PRIV : "realview_mpcore");
         qdev_prop_set_uint32(dev, "num-cpu", smp_cpus);
-        qdev_init_nofail(dev);
         busdev = SYS_BUS_DEVICE(dev);
+        sysbus_realize_and_unref(busdev, &error_fatal);
         sysbus_mmio_map(busdev, 0, periphbase);
         for (n = 0; n < smp_cpus; n++) {
             sysbus_connect_irq(busdev, n, cpu_irq[n]);
@@ -188,9 +188,9 @@ static void realview_init(MachineState *machine,
         pic[n] = qdev_get_gpio_in(dev, n);
     }
 
-    pl041 = qdev_create(NULL, "pl041");
+    pl041 = qdev_new("pl041");
     qdev_prop_set_uint32(pl041, "nc_fifo_depth", 512);
-    qdev_init_nofail(pl041);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(pl041), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(pl041), 0, 0x10004000);
     sysbus_connect_irq(SYS_BUS_DEVICE(pl041), 0, pic[19]);
 
@@ -203,11 +203,11 @@ static void realview_init(MachineState *machine,
     pl011_create(0x1000c000, pic[15], serial_hd(3));
 
     /* DMA controller is optional, apparently.  */
-    dev = qdev_create(NULL, "pl081");
+    dev = qdev_new("pl081");
     object_property_set_link(OBJECT(dev), OBJECT(sysmem), "downstream",
                              &error_fatal);
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, 0x10030000);
     sysbus_connect_irq(busdev, 0, pic[24]);
 
@@ -239,9 +239,9 @@ static void realview_init(MachineState *machine,
     sysbus_create_simple("pl031", 0x10017000, pic[10]);
 
     if (!is_pb) {
-        dev = qdev_create(NULL, "realview_pci");
+        dev = qdev_new("realview_pci");
         busdev = SYS_BUS_DEVICE(dev);
-        qdev_init_nofail(dev);
+        sysbus_realize_and_unref(busdev, &error_fatal);
         sysbus_mmio_map(busdev, 0, 0x10019000); /* PCI controller registers */
         sysbus_mmio_map(busdev, 1, 0x60000000); /* PCI self-config */
         sysbus_mmio_map(busdev, 2, 0x61000000); /* PCI config */
diff --git a/hw/arm/sabrelite.c b/hw/arm/sabrelite.c
index 96cb30aa3c..a27e5baf60 100644
--- a/hw/arm/sabrelite.c
+++ b/hw/arm/sabrelite.c
@@ -51,7 +51,7 @@ static void sabrelite_init(MachineState *machine)
 
     s = FSL_IMX6(object_new(TYPE_FSL_IMX6));
     object_property_add_child(OBJECT(machine), "soc", OBJECT(s));
-    object_property_set_bool(OBJECT(s), true, "realized", &error_fatal);
+    qdev_realize(DEVICE(s), NULL, &error_fatal);
 
     memory_region_add_subregion(get_system_memory(), FSL_IMX6_MMDC_ADDR,
                                 machine->ram);
@@ -75,13 +75,13 @@ static void sabrelite_init(MachineState *machine)
                 qemu_irq cs_line;
                 DriveInfo *dinfo = drive_get_next(IF_MTD);
 
-                flash_dev = ssi_create_slave_no_init(spi_bus, "sst25vf016b");
+                flash_dev = qdev_new("sst25vf016b");
                 if (dinfo) {
                     qdev_prop_set_drive(flash_dev, "drive",
                                         blk_by_legacy_dinfo(dinfo),
                                         &error_fatal);
                 }
-                qdev_init_nofail(flash_dev);
+                qdev_realize_and_unref(flash_dev, BUS(spi_bus), &error_fatal);
 
                 cs_line = qdev_get_gpio_in_named(flash_dev, SSI_GPIO_CS, 0);
                 sysbus_connect_irq(SYS_BUS_DEVICE(spi_dev), 1, cs_line);
diff --git a/hw/arm/sbsa-ref.c b/hw/arm/sbsa-ref.c
index 6a0221a681..e40c868a82 100644
--- a/hw/arm/sbsa-ref.c
+++ b/hw/arm/sbsa-ref.c
@@ -211,7 +211,7 @@ static PFlashCFI01 *sbsa_flash_create1(SBSAMachineState *sms,
      * Create a single flash device.  We use the same parameters as
      * the flash devices on the Versatile Express board.
      */
-    DeviceState *dev = qdev_create(NULL, TYPE_PFLASH_CFI01);
+    DeviceState *dev = qdev_new(TYPE_PFLASH_CFI01);
 
     qdev_prop_set_uint64(dev, "sector-length", SBSA_FLASH_SECTOR_SIZE);
     qdev_prop_set_uint8(dev, "width", 4);
@@ -243,7 +243,7 @@ static void sbsa_flash_map1(PFlashCFI01 *flash,
     assert(QEMU_IS_ALIGNED(size, SBSA_FLASH_SECTOR_SIZE));
     assert(size / SBSA_FLASH_SECTOR_SIZE <= UINT32_MAX);
     qdev_prop_set_uint32(dev, "num-blocks", size / SBSA_FLASH_SECTOR_SIZE);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     memory_region_add_subregion(sysmem, base,
                                 sysbus_mmio_get_region(SYS_BUS_DEVICE(dev),
@@ -339,7 +339,7 @@ static void create_gic(SBSAMachineState *sms)
 
     gictype = gicv3_class_name();
 
-    sms->gic = qdev_create(NULL, gictype);
+    sms->gic = qdev_new(gictype);
     qdev_prop_set_uint32(sms->gic, "revision", 3);
     qdev_prop_set_uint32(sms->gic, "num-cpu", smp_cpus);
     /*
@@ -356,8 +356,8 @@ static void create_gic(SBSAMachineState *sms)
     qdev_prop_set_uint32(sms->gic, "len-redist-region-count", 1);
     qdev_prop_set_uint32(sms->gic, "redist-region-count[0]", redist0_count);
 
-    qdev_init_nofail(sms->gic);
     gicbusdev = SYS_BUS_DEVICE(sms->gic);
+    sysbus_realize_and_unref(gicbusdev, &error_fatal);
     sysbus_mmio_map(gicbusdev, 0, sbsa_ref_memmap[SBSA_GIC_DIST].base);
     sysbus_mmio_map(gicbusdev, 1, sbsa_ref_memmap[SBSA_GIC_REDIST].base);
 
@@ -409,11 +409,11 @@ static void create_uart(const SBSAMachineState *sms, int uart,
 {
     hwaddr base = sbsa_ref_memmap[uart].base;
     int irq = sbsa_ref_irqmap[uart];
-    DeviceState *dev = qdev_create(NULL, TYPE_PL011);
+    DeviceState *dev = qdev_new(TYPE_PL011);
     SysBusDevice *s = SYS_BUS_DEVICE(dev);
 
     qdev_prop_set_chr(dev, "chardev", chr);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     memory_region_add_subregion(mem, base,
                                 sysbus_mmio_get_region(s, 0));
     sysbus_connect_irq(s, 0, qdev_get_gpio_in(sms->gic, irq));
@@ -464,9 +464,9 @@ static void create_ahci(const SBSAMachineState *sms)
     AHCIState *ahci;
     int i;
 
-    dev = qdev_create(NULL, "sysbus-ahci");
+    dev = qdev_new("sysbus-ahci");
     qdev_prop_set_uint32(dev, "num-ports", NUM_SATA_PORTS);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, qdev_get_gpio_in(sms->gic, irq));
 
@@ -497,11 +497,11 @@ static void create_smmu(const SBSAMachineState *sms, PCIBus *bus)
     DeviceState *dev;
     int i;
 
-    dev = qdev_create(NULL, "arm-smmuv3");
+    dev = qdev_new("arm-smmuv3");
 
     object_property_set_link(OBJECT(dev), OBJECT(bus), "primary-bus",
                              &error_abort);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
     for (i = 0; i < NUM_SMMU_IRQS; i++) {
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), i,
@@ -525,8 +525,8 @@ static void create_pcie(SBSAMachineState *sms)
     PCIHostState *pci;
     int i;
 
-    dev = qdev_create(NULL, TYPE_GPEX_HOST);
-    qdev_init_nofail(dev);
+    dev = qdev_new(TYPE_GPEX_HOST);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     /* Map ECAM space */
     ecam_alias = g_new0(MemoryRegion, 1);
@@ -680,7 +680,7 @@ static void sbsa_ref_init(MachineState *machine)
         object_property_set_link(cpuobj, OBJECT(secure_sysmem),
                                  "secure-memory", &error_abort);
 
-        object_property_set_bool(cpuobj, true, "realized", &error_fatal);
+        qdev_realize(DEVICE(cpuobj), NULL, &error_fatal);
         object_unref(cpuobj);
     }
 
diff --git a/hw/arm/spitz.c b/hw/arm/spitz.c
index c28d9b5ed7..fc18212e68 100644
--- a/hw/arm/spitz.c
+++ b/hw/arm/spitz.c
@@ -155,7 +155,7 @@ static void sl_flash_register(PXA2xxState *cpu, int size)
 {
     DeviceState *dev;
 
-    dev = qdev_create(NULL, TYPE_SL_NAND);
+    dev = qdev_new(TYPE_SL_NAND);
 
     qdev_prop_set_uint8(dev, "manf_id", NAND_MFR_SAMSUNG);
     if (size == FLASH_128M)
@@ -163,7 +163,7 @@ static void sl_flash_register(PXA2xxState *cpu, int size)
     else if (size == FLASH_1024M)
         qdev_prop_set_uint8(dev, "chip_id", 0xf1);
 
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, FLASH_BASE);
 }
 
diff --git a/hw/arm/stellaris.c b/hw/arm/stellaris.c
index d136ba1a92..97ef566c12 100644
--- a/hw/arm/stellaris.c
+++ b/hw/arm/stellaris.c
@@ -1308,14 +1308,14 @@ static void stellaris_init(MachineState *ms, stellaris_board_info *board)
                            &error_fatal);
     memory_region_add_subregion(system_memory, 0x20000000, sram);
 
-    nvic = qdev_create(NULL, TYPE_ARMV7M);
+    nvic = qdev_new(TYPE_ARMV7M);
     qdev_prop_set_uint32(nvic, "num-irq", NUM_IRQ_LINES);
     qdev_prop_set_string(nvic, "cpu-type", ms->cpu_type);
     qdev_prop_set_bit(nvic, "enable-bitband", true);
     object_property_set_link(OBJECT(nvic), OBJECT(get_system_memory()),
                                      "memory", &error_abort);
     /* This will exit with an error if the user passed us a bad cpu_type */
-    qdev_init_nofail(nvic);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(nvic), &error_fatal);
 
     qdev_connect_gpio_out_named(nvic, "SYSRESETREQ", 0,
                                 qemu_allocate_irq(&do_sys_reset, NULL, 0));
@@ -1347,13 +1347,13 @@ static void stellaris_init(MachineState *ms, stellaris_board_info *board)
 
 
     if (board->dc1 & (1 << 3)) { /* watchdog present */
-        dev = qdev_create(NULL, TYPE_LUMINARY_WATCHDOG);
+        dev = qdev_new(TYPE_LUMINARY_WATCHDOG);
 
         /* system_clock_scale is valid now */
         uint32_t mainclk = NANOSECONDS_PER_SECOND / system_clock_scale;
         qdev_prop_set_uint32(dev, "wdogclk-frq", mainclk);
 
-        qdev_init_nofail(dev);
+        sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
         sysbus_mmio_map(SYS_BUS_DEVICE(dev),
                         0,
                         0x40000000u);
@@ -1425,9 +1425,9 @@ static void stellaris_init(MachineState *ms, stellaris_board_info *board)
 
         qemu_check_nic_model(&nd_table[0], "stellaris");
 
-        enet = qdev_create(NULL, "stellaris_enet");
+        enet = qdev_new("stellaris_enet");
         qdev_set_nic_properties(enet, &nd_table[0]);
-        qdev_init_nofail(enet);
+        sysbus_realize_and_unref(SYS_BUS_DEVICE(enet), &error_fatal);
         sysbus_mmio_map(SYS_BUS_DEVICE(enet), 0, 0x40048000);
         sysbus_connect_irq(SYS_BUS_DEVICE(enet), 0, qdev_get_gpio_in(nvic, 42));
     }
diff --git a/hw/arm/stm32f205_soc.c b/hw/arm/stm32f205_soc.c
index 118c342559..19487544f0 100644
--- a/hw/arm/stm32f205_soc.c
+++ b/hw/arm/stm32f205_soc.c
@@ -51,32 +51,28 @@ static void stm32f205_soc_initfn(Object *obj)
     STM32F205State *s = STM32F205_SOC(obj);
     int i;
 
-    sysbus_init_child_obj(obj, "armv7m", &s->armv7m, sizeof(s->armv7m),
-                          TYPE_ARMV7M);
+    object_initialize_child(obj, "armv7m", &s->armv7m, TYPE_ARMV7M);
 
-    sysbus_init_child_obj(obj, "syscfg", &s->syscfg, sizeof(s->syscfg),
-                          TYPE_STM32F2XX_SYSCFG);
+    object_initialize_child(obj, "syscfg", &s->syscfg, TYPE_STM32F2XX_SYSCFG);
 
     for (i = 0; i < STM_NUM_USARTS; i++) {
-        sysbus_init_child_obj(obj, "usart[*]", &s->usart[i],
-                              sizeof(s->usart[i]), TYPE_STM32F2XX_USART);
+        object_initialize_child(obj, "usart[*]", &s->usart[i],
+                                TYPE_STM32F2XX_USART);
     }
 
     for (i = 0; i < STM_NUM_TIMERS; i++) {
-        sysbus_init_child_obj(obj, "timer[*]", &s->timer[i],
-                              sizeof(s->timer[i]), TYPE_STM32F2XX_TIMER);
+        object_initialize_child(obj, "timer[*]", &s->timer[i],
+                                TYPE_STM32F2XX_TIMER);
     }
 
     s->adc_irqs = OR_IRQ(object_new(TYPE_OR_IRQ));
 
     for (i = 0; i < STM_NUM_ADCS; i++) {
-        sysbus_init_child_obj(obj, "adc[*]", &s->adc[i], sizeof(s->adc[i]),
-                              TYPE_STM32F2XX_ADC);
+        object_initialize_child(obj, "adc[*]", &s->adc[i], TYPE_STM32F2XX_ADC);
     }
 
     for (i = 0; i < STM_NUM_SPIS; i++) {
-        sysbus_init_child_obj(obj, "spi[*]", &s->spi[i], sizeof(s->spi[i]),
-                              TYPE_STM32F2XX_SPI);
+        object_initialize_child(obj, "spi[*]", &s->spi[i], TYPE_STM32F2XX_SPI);
     }
 }
 
@@ -111,7 +107,7 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
     qdev_prop_set_bit(armv7m, "enable-bitband", true);
     object_property_set_link(OBJECT(&s->armv7m), OBJECT(get_system_memory()),
                                      "memory", &error_abort);
-    object_property_set_bool(OBJECT(&s->armv7m), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -119,7 +115,7 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
 
     /* System configuration controller */
     dev = DEVICE(&s->syscfg);
-    object_property_set_bool(OBJECT(&s->syscfg), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->syscfg), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -132,7 +128,7 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
     for (i = 0; i < STM_NUM_USARTS; i++) {
         dev = DEVICE(&(s->usart[i]));
         qdev_prop_set_chr(dev, "chardev", serial_hd(i));
-        object_property_set_bool(OBJECT(&s->usart[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->usart[i]), &err);
         if (err != NULL) {
             error_propagate(errp, err);
             return;
@@ -146,7 +142,7 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
     for (i = 0; i < STM_NUM_TIMERS; i++) {
         dev = DEVICE(&(s->timer[i]));
         qdev_prop_set_uint64(dev, "clock-frequency", 1000000000);
-        object_property_set_bool(OBJECT(&s->timer[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->timer[i]), &err);
         if (err != NULL) {
             error_propagate(errp, err);
             return;
@@ -159,7 +155,7 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
     /* ADC 1 to 3 */
     object_property_set_int(OBJECT(s->adc_irqs), STM_NUM_ADCS,
                             "num-lines", &err);
-    object_property_set_bool(OBJECT(s->adc_irqs), true, "realized", &err);
+    qdev_realize(DEVICE(s->adc_irqs), NULL, &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -169,7 +165,7 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
 
     for (i = 0; i < STM_NUM_ADCS; i++) {
         dev = DEVICE(&(s->adc[i]));
-        object_property_set_bool(OBJECT(&s->adc[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->adc[i]), &err);
         if (err != NULL) {
             error_propagate(errp, err);
             return;
@@ -183,7 +179,7 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
     /* SPI 1 and 2 */
     for (i = 0; i < STM_NUM_SPIS; i++) {
         dev = DEVICE(&(s->spi[i]));
-        object_property_set_bool(OBJECT(&s->spi[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), &err);
         if (err != NULL) {
             error_propagate(errp, err);
             return;
diff --git a/hw/arm/stm32f405_soc.c b/hw/arm/stm32f405_soc.c
index 4f10ce6176..c12d9f999d 100644
--- a/hw/arm/stm32f405_soc.c
+++ b/hw/arm/stm32f405_soc.c
@@ -37,7 +37,8 @@ static const uint32_t usart_addr[] = { 0x40011000, 0x40004400, 0x40004800,
 /* At the moment only Timer 2 to 5 are modelled */
 static const uint32_t timer_addr[] = { 0x40000000, 0x40000400,
                                        0x40000800, 0x40000C00 };
-#define ADC_ADDR                       0x40012000
+static const uint32_t adc_addr[] = { 0x40012000, 0x40012100, 0x40012200,
+                                     0x40012300, 0x40012400, 0x40012500 };
 static const uint32_t spi_addr[] =   { 0x40013000, 0x40003800, 0x40003C00,
                                        0x40013400, 0x40015000, 0x40015400 };
 #define EXTI_ADDR                      0x40013C00
@@ -56,34 +57,29 @@ static void stm32f405_soc_initfn(Object *obj)
     STM32F405State *s = STM32F405_SOC(obj);
     int i;
 
-    sysbus_init_child_obj(obj, "armv7m", &s->armv7m, sizeof(s->armv7m),
-                          TYPE_ARMV7M);
+    object_initialize_child(obj, "armv7m", &s->armv7m, TYPE_ARMV7M);
 
-    sysbus_init_child_obj(obj, "syscfg", &s->syscfg, sizeof(s->syscfg),
-                          TYPE_STM32F4XX_SYSCFG);
+    object_initialize_child(obj, "syscfg", &s->syscfg, TYPE_STM32F4XX_SYSCFG);
 
     for (i = 0; i < STM_NUM_USARTS; i++) {
-        sysbus_init_child_obj(obj, "usart[*]", &s->usart[i],
-                              sizeof(s->usart[i]), TYPE_STM32F2XX_USART);
+        object_initialize_child(obj, "usart[*]", &s->usart[i],
+                                TYPE_STM32F2XX_USART);
     }
 
     for (i = 0; i < STM_NUM_TIMERS; i++) {
-        sysbus_init_child_obj(obj, "timer[*]", &s->timer[i],
-                              sizeof(s->timer[i]), TYPE_STM32F2XX_TIMER);
+        object_initialize_child(obj, "timer[*]", &s->timer[i],
+                                TYPE_STM32F2XX_TIMER);
     }
 
     for (i = 0; i < STM_NUM_ADCS; i++) {
-        sysbus_init_child_obj(obj, "adc[*]", &s->adc[i], sizeof(s->adc[i]),
-                              TYPE_STM32F2XX_ADC);
+        object_initialize_child(obj, "adc[*]", &s->adc[i], TYPE_STM32F2XX_ADC);
     }
 
     for (i = 0; i < STM_NUM_SPIS; i++) {
-        sysbus_init_child_obj(obj, "spi[*]", &s->spi[i], sizeof(s->spi[i]),
-                              TYPE_STM32F2XX_SPI);
+        object_initialize_child(obj, "spi[*]", &s->spi[i], TYPE_STM32F2XX_SPI);
     }
 
-    sysbus_init_child_obj(obj, "exti", &s->exti, sizeof(s->exti),
-                          TYPE_STM32F4XX_EXTI);
+    object_initialize_child(obj, "exti", &s->exti, TYPE_STM32F4XX_EXTI);
 }
 
 static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
@@ -122,7 +118,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     qdev_prop_set_bit(armv7m, "enable-bitband", true);
     object_property_set_link(OBJECT(&s->armv7m), OBJECT(system_memory),
                                      "memory", &error_abort);
-    object_property_set_bool(OBJECT(&s->armv7m), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -130,7 +126,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
 
     /* System configuration controller */
     dev = DEVICE(&s->syscfg);
-    object_property_set_bool(OBJECT(&s->syscfg), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->syscfg), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -143,7 +139,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     for (i = 0; i < STM_NUM_USARTS; i++) {
         dev = DEVICE(&(s->usart[i]));
         qdev_prop_set_chr(dev, "chardev", serial_hd(i));
-        object_property_set_bool(OBJECT(&s->usart[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->usart[i]), &err);
         if (err != NULL) {
             error_propagate(errp, err);
             return;
@@ -157,7 +153,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     for (i = 0; i < STM_NUM_TIMERS; i++) {
         dev = DEVICE(&(s->timer[i]));
         qdev_prop_set_uint64(dev, "clock-frequency", 1000000000);
-        object_property_set_bool(OBJECT(&s->timer[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->timer[i]), &err);
         if (err != NULL) {
             error_propagate(errp, err);
             return;
@@ -168,16 +164,16 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     }
 
     /* ADC device, the IRQs are ORed together */
-    object_initialize_child(OBJECT(s), "adc-orirq", &s->adc_irqs,
-                            sizeof(s->adc_irqs), TYPE_OR_IRQ,
-                            &err, NULL);
+    object_initialize_child_with_props(OBJECT(s), "adc-orirq", &s->adc_irqs,
+                                       sizeof(s->adc_irqs), TYPE_OR_IRQ, &err,
+                                       NULL);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
     }
     object_property_set_int(OBJECT(&s->adc_irqs), STM_NUM_ADCS,
                             "num-lines", &err);
-    object_property_set_bool(OBJECT(&s->adc_irqs), true, "realized", &err);
+    qdev_realize(DEVICE(&s->adc_irqs), NULL, &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
@@ -185,21 +181,23 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     qdev_connect_gpio_out(DEVICE(&s->adc_irqs), 0,
                           qdev_get_gpio_in(armv7m, ADC_IRQ));
 
-    dev = DEVICE(&(s->adc[i]));
-    object_property_set_bool(OBJECT(&s->adc[i]), true, "realized", &err);
-    if (err != NULL) {
-        error_propagate(errp, err);
-        return;
+    for (i = 0; i < STM_NUM_ADCS; i++) {
+        dev = DEVICE(&(s->adc[i]));
+        sysbus_realize(SYS_BUS_DEVICE(&s->adc[i]), &err);
+        if (err != NULL) {
+            error_propagate(errp, err);
+            return;
+        }
+        busdev = SYS_BUS_DEVICE(dev);
+        sysbus_mmio_map(busdev, 0, adc_addr[i]);
+        sysbus_connect_irq(busdev, 0,
+                           qdev_get_gpio_in(DEVICE(&s->adc_irqs), i));
     }
-    busdev = SYS_BUS_DEVICE(dev);
-    sysbus_mmio_map(busdev, 0, ADC_ADDR);
-    sysbus_connect_irq(busdev, 0,
-                       qdev_get_gpio_in(DEVICE(&s->adc_irqs), i));
 
     /* SPI devices */
     for (i = 0; i < STM_NUM_SPIS; i++) {
         dev = DEVICE(&(s->spi[i]));
-        object_property_set_bool(OBJECT(&s->spi[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), &err);
         if (err != NULL) {
             error_propagate(errp, err);
             return;
@@ -211,7 +209,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
 
     /* EXTI device */
     dev = DEVICE(&s->exti);
-    object_property_set_bool(OBJECT(&s->exti), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->exti), &err);
     if (err != NULL) {
         error_propagate(errp, err);
         return;
diff --git a/hw/arm/strongarm.c b/hw/arm/strongarm.c
index 3010d765bb..2639b9ae55 100644
--- a/hw/arm/strongarm.c
+++ b/hw/arm/strongarm.c
@@ -42,6 +42,7 @@
 #include "chardev/char-serial.h"
 #include "sysemu/sysemu.h"
 #include "hw/ssi/ssi.h"
+#include "qapi/error.h"
 #include "qemu/cutils.h"
 #include "qemu/log.h"
 
@@ -644,8 +645,8 @@ static DeviceState *strongarm_gpio_init(hwaddr base,
     DeviceState *dev;
     int i;
 
-    dev = qdev_create(NULL, TYPE_STRONGARM_GPIO);
-    qdev_init_nofail(dev);
+    dev = qdev_new(TYPE_STRONGARM_GPIO);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
     for (i = 0; i < 12; i++)
@@ -1626,9 +1627,9 @@ StrongARMState *sa1110_init(const char *cpu_type)
     s->ppc = sysbus_create_varargs(TYPE_STRONGARM_PPC, 0x90060000, NULL);
 
     for (i = 0; sa_serial[i].io_base; i++) {
-        DeviceState *dev = qdev_create(NULL, TYPE_STRONGARM_UART);
+        DeviceState *dev = qdev_new(TYPE_STRONGARM_UART);
         qdev_prop_set_chr(dev, "chardev", serial_hd(i));
-        qdev_init_nofail(dev);
+        sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
         sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0,
                 sa_serial[i].io_base);
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
diff --git a/hw/arm/versatilepb.c b/hw/arm/versatilepb.c
index f3c4a50b19..2ebdcbd8ac 100644
--- a/hw/arm/versatilepb.c
+++ b/hw/arm/versatilepb.c
@@ -215,7 +215,7 @@ static void versatile_init(MachineState *machine, int board_id)
         object_property_set_bool(cpuobj, false, "has_el3", &error_fatal);
     }
 
-    object_property_set_bool(cpuobj, true, "realized", &error_fatal);
+    qdev_realize(DEVICE(cpuobj), NULL, &error_fatal);
 
     cpu = ARM_CPU(cpuobj);
 
@@ -223,10 +223,10 @@ static void versatile_init(MachineState *machine, int board_id)
     /* SDRAM at address zero.  */
     memory_region_add_subregion(sysmem, 0, machine->ram);
 
-    sysctl = qdev_create(NULL, "realview_sysctl");
+    sysctl = qdev_new("realview_sysctl");
     qdev_prop_set_uint32(sysctl, "sys_id", 0x41007004);
     qdev_prop_set_uint32(sysctl, "proc_id", 0x02000000);
-    qdev_init_nofail(sysctl);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(sysctl), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(sysctl), 0, 0x10000000);
 
     dev = sysbus_create_varargs("pl190", 0x10140000,
@@ -245,9 +245,9 @@ static void versatile_init(MachineState *machine, int board_id)
     sysbus_create_simple("pl050_keyboard", 0x10006000, sic[3]);
     sysbus_create_simple("pl050_mouse", 0x10007000, sic[4]);
 
-    dev = qdev_create(NULL, "versatile_pci");
+    dev = qdev_new("versatile_pci");
     busdev = SYS_BUS_DEVICE(dev);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, 0x10001000); /* PCI controller regs */
     sysbus_mmio_map(busdev, 1, 0x41000000); /* PCI self-config */
     sysbus_mmio_map(busdev, 2, 0x42000000); /* PCI config */
@@ -286,11 +286,11 @@ static void versatile_init(MachineState *machine, int board_id)
     pl011_create(0x101f3000, pic[14], serial_hd(2));
     pl011_create(0x10009000, sic[6], serial_hd(3));
 
-    dev = qdev_create(NULL, "pl080");
+    dev = qdev_new("pl080");
     object_property_set_link(OBJECT(dev), OBJECT(sysmem), "downstream",
                              &error_fatal);
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, 0x10130000);
     sysbus_connect_irq(busdev, 0, pic[17]);
 
@@ -319,9 +319,9 @@ static void versatile_init(MachineState *machine, int board_id)
     i2c_create_slave(i2c, "ds1338", 0x68);
 
     /* Add PL041 AACI Interface to the LM4549 codec */
-    pl041 = qdev_create(NULL, "pl041");
+    pl041 = qdev_new("pl041");
     qdev_prop_set_uint32(pl041, "nc_fifo_depth", 512);
-    qdev_init_nofail(pl041);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(pl041), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(pl041), 0, 0x10004000);
     sysbus_connect_irq(SYS_BUS_DEVICE(pl041), 0, sic[24]);
 
diff --git a/hw/arm/vexpress.c b/hw/arm/vexpress.c
index 69ee4988f9..7ca5d523a4 100644
--- a/hw/arm/vexpress.c
+++ b/hw/arm/vexpress.c
@@ -229,17 +229,17 @@ static void init_cpus(MachineState *ms, const char *cpu_type,
             object_property_set_int(cpuobj, periphbase,
                                     "reset-cbar", &error_abort);
         }
-        object_property_set_bool(cpuobj, true, "realized", &error_fatal);
+        qdev_realize(DEVICE(cpuobj), NULL, &error_fatal);
     }
 
     /* Create the private peripheral devices (including the GIC);
      * this must happen after the CPUs are created because a15mpcore_priv
      * wires itself up to the CPU's generic_timer gpio out lines.
      */
-    dev = qdev_create(NULL, privdev);
+    dev = qdev_new(privdev);
     qdev_prop_set_uint32(dev, "num-cpu", smp_cpus);
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, periphbase);
 
     /* Interrupts [42:0] are from the motherboard;
@@ -514,7 +514,7 @@ static void vexpress_modify_dtb(const struct arm_boot_info *info, void *fdt)
 static PFlashCFI01 *ve_pflash_cfi01_register(hwaddr base, const char *name,
                                              DriveInfo *di)
 {
-    DeviceState *dev = qdev_create(NULL, TYPE_PFLASH_CFI01);
+    DeviceState *dev = qdev_new(TYPE_PFLASH_CFI01);
 
     if (di) {
         qdev_prop_set_drive(dev, "drive", blk_by_legacy_dinfo(di),
@@ -532,7 +532,7 @@ static PFlashCFI01 *ve_pflash_cfi01_register(hwaddr base, const char *name,
     qdev_prop_set_uint16(dev, "id2", 0x00);
     qdev_prop_set_uint16(dev, "id3", 0x00);
     qdev_prop_set_string(dev, "name", name);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
     return PFLASH_CFI01(dev);
@@ -593,7 +593,7 @@ static void vexpress_common_init(MachineState *machine)
 
     sys_id = 0x1190f500;
 
-    sysctl = qdev_create(NULL, "realview_sysctl");
+    sysctl = qdev_new("realview_sysctl");
     qdev_prop_set_uint32(sysctl, "sys_id", sys_id);
     qdev_prop_set_uint32(sysctl, "proc_id", daughterboard->proc_id);
     qdev_prop_set_uint32(sysctl, "len-db-voltage",
@@ -610,15 +610,15 @@ static void vexpress_common_init(MachineState *machine)
         qdev_prop_set_uint32(sysctl, propname, daughterboard->clocks[i]);
         g_free(propname);
     }
-    qdev_init_nofail(sysctl);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(sysctl), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(sysctl), 0, map[VE_SYSREGS]);
 
     /* VE_SP810: not modelled */
     /* VE_SERIALPCI: not modelled */
 
-    pl041 = qdev_create(NULL, "pl041");
+    pl041 = qdev_new("pl041");
     qdev_prop_set_uint32(pl041, "nc_fifo_depth", 512);
-    qdev_init_nofail(pl041);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(pl041), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(pl041), 0, map[VE_PL041]);
     sysbus_connect_irq(SYS_BUS_DEVICE(pl041), 0, pic[11]);
 
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 37462a6f78..caceb1e4a0 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -572,14 +572,14 @@ static inline DeviceState *create_acpi_ged(VirtMachineState *vms)
         event |= ACPI_GED_NVDIMM_HOTPLUG_EVT;
     }
 
-    dev = qdev_create(NULL, TYPE_ACPI_GED);
+    dev = qdev_new(TYPE_ACPI_GED);
     qdev_prop_set_uint32(dev, "ged-event", event);
 
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, vms->memmap[VIRT_ACPI_GED].base);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 1, vms->memmap[VIRT_PCDIMM_ACPI].base);
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, qdev_get_gpio_in(vms->gic, irq));
 
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     return dev;
 }
@@ -594,11 +594,11 @@ static void create_its(VirtMachineState *vms)
         return;
     }
 
-    dev = qdev_create(NULL, itsclass);
+    dev = qdev_new(itsclass);
 
     object_property_set_link(OBJECT(dev), OBJECT(vms->gic), "parent-gicv3",
                              &error_abort);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, vms->memmap[VIRT_GIC_ITS].base);
 
     fdt_add_its_gic_node(vms);
@@ -610,11 +610,11 @@ static void create_v2m(VirtMachineState *vms)
     int irq = vms->irqmap[VIRT_GIC_V2M];
     DeviceState *dev;
 
-    dev = qdev_create(NULL, "arm-gicv2m");
+    dev = qdev_new("arm-gicv2m");
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, vms->memmap[VIRT_GIC_V2M].base);
     qdev_prop_set_uint32(dev, "base-spi", irq);
     qdev_prop_set_uint32(dev, "num-spi", NUM_GICV2M_SPIS);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     for (i = 0; i < NUM_GICV2M_SPIS; i++) {
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), i,
@@ -636,7 +636,7 @@ static void create_gic(VirtMachineState *vms)
 
     gictype = (type == 3) ? gicv3_class_name() : gic_class_name();
 
-    vms->gic = qdev_create(NULL, gictype);
+    vms->gic = qdev_new(gictype);
     qdev_prop_set_uint32(vms->gic, "revision", type);
     qdev_prop_set_uint32(vms->gic, "num-cpu", smp_cpus);
     /* Note that the num-irq property counts both internal and external
@@ -671,8 +671,8 @@ static void create_gic(VirtMachineState *vms)
                               vms->virt);
         }
     }
-    qdev_init_nofail(vms->gic);
     gicbusdev = SYS_BUS_DEVICE(vms->gic);
+    sysbus_realize_and_unref(gicbusdev, &error_fatal);
     sysbus_mmio_map(gicbusdev, 0, vms->memmap[VIRT_GIC_DIST].base);
     if (type == 3) {
         sysbus_mmio_map(gicbusdev, 1, vms->memmap[VIRT_GIC_REDIST].base);
@@ -754,11 +754,11 @@ static void create_uart(const VirtMachineState *vms, int uart,
     int irq = vms->irqmap[uart];
     const char compat[] = "arm,pl011\0arm,primecell";
     const char clocknames[] = "uartclk\0apb_pclk";
-    DeviceState *dev = qdev_create(NULL, TYPE_PL011);
+    DeviceState *dev = qdev_new(TYPE_PL011);
     SysBusDevice *s = SYS_BUS_DEVICE(dev);
 
     qdev_prop_set_chr(dev, "chardev", chr);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     memory_region_add_subregion(mem, base,
                                 sysbus_mmio_get_region(s, 0));
     sysbus_connect_irq(s, 0, qdev_get_gpio_in(vms->gic, irq));
@@ -948,7 +948,7 @@ static PFlashCFI01 *virt_flash_create1(VirtMachineState *vms,
      * Create a single flash device.  We use the same parameters as
      * the flash devices on the Versatile Express board.
      */
-    DeviceState *dev = qdev_create(NULL, TYPE_PFLASH_CFI01);
+    DeviceState *dev = qdev_new(TYPE_PFLASH_CFI01);
 
     qdev_prop_set_uint64(dev, "sector-length", VIRT_FLASH_SECTOR_SIZE);
     qdev_prop_set_uint8(dev, "width", 4);
@@ -980,7 +980,7 @@ static void virt_flash_map1(PFlashCFI01 *flash,
     assert(QEMU_IS_ALIGNED(size, VIRT_FLASH_SECTOR_SIZE));
     assert(size / VIRT_FLASH_SECTOR_SIZE <= UINT32_MAX);
     qdev_prop_set_uint32(dev, "num-blocks", size / VIRT_FLASH_SECTOR_SIZE);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     memory_region_add_subregion(sysmem, base,
                                 sysbus_mmio_get_region(SYS_BUS_DEVICE(dev),
@@ -1173,11 +1173,11 @@ static void create_smmu(const VirtMachineState *vms,
         return;
     }
 
-    dev = qdev_create(NULL, "arm-smmuv3");
+    dev = qdev_new("arm-smmuv3");
 
     object_property_set_link(OBJECT(dev), OBJECT(bus), "primary-bus",
                              &error_abort);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
     for (i = 0; i < NUM_SMMU_IRQS; i++) {
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), i,
@@ -1253,8 +1253,8 @@ static void create_pcie(VirtMachineState *vms)
     int i, ecam_id;
     PCIHostState *pci;
 
-    dev = qdev_create(NULL, TYPE_GPEX_HOST);
-    qdev_init_nofail(dev);
+    dev = qdev_new(TYPE_GPEX_HOST);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     ecam_id = VIRT_ECAM_ID(vms->highmem_ecam);
     base_ecam = vms->memmap[ecam_id].base;
@@ -1372,11 +1372,11 @@ static void create_platform_bus(VirtMachineState *vms)
     int i;
     MemoryRegion *sysmem = get_system_memory();
 
-    dev = qdev_create(NULL, TYPE_PLATFORM_BUS_DEVICE);
+    dev = qdev_new(TYPE_PLATFORM_BUS_DEVICE);
     dev->id = TYPE_PLATFORM_BUS_DEVICE;
     qdev_prop_set_uint32(dev, "num_irqs", PLATFORM_BUS_NUM_IRQS);
     qdev_prop_set_uint32(dev, "mmio_size", vms->memmap[VIRT_PLATFORM_BUS].size);
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     vms->platform_bus_dev = dev;
 
     s = SYS_BUS_DEVICE(dev);
@@ -1819,7 +1819,7 @@ static void machvirt_init(MachineState *machine)
                                      "secure-memory", &error_abort);
         }
 
-        object_property_set_bool(cpuobj, true, "realized", &error_fatal);
+        qdev_realize(DEVICE(cpuobj), NULL, &error_fatal);
         object_unref(cpuobj);
     }
     fdt_add_timer_nodes(vms);
diff --git a/hw/arm/xilinx_zynq.c b/hw/arm/xilinx_zynq.c
index cb933efb49..4247c4dbd8 100644
--- a/hw/arm/xilinx_zynq.c
+++ b/hw/arm/xilinx_zynq.c
@@ -114,13 +114,13 @@ static void gem_init(NICInfo *nd, uint32_t base, qemu_irq irq)
     DeviceState *dev;
     SysBusDevice *s;
 
-    dev = qdev_create(NULL, TYPE_CADENCE_GEM);
+    dev = qdev_new(TYPE_CADENCE_GEM);
     if (nd->used) {
         qemu_check_nic_model(nd, TYPE_CADENCE_GEM);
         qdev_set_nic_properties(dev, nd);
     }
-    qdev_init_nofail(dev);
     s = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(s, &error_fatal);
     sysbus_mmio_map(s, 0, base);
     sysbus_connect_irq(s, 0, irq);
 }
@@ -136,12 +136,12 @@ static inline void zynq_init_spi_flashes(uint32_t base_addr, qemu_irq irq,
     int num_busses =  is_qspi ? NUM_QSPI_BUSSES : 1;
     int num_ss = is_qspi ? NUM_QSPI_FLASHES : NUM_SPI_FLASHES;
 
-    dev = qdev_create(NULL, is_qspi ? "xlnx.ps7-qspi" : "xlnx.ps7-spi");
+    dev = qdev_new(is_qspi ? "xlnx.ps7-qspi" : "xlnx.ps7-spi");
     qdev_prop_set_uint8(dev, "num-txrx-bytes", is_qspi ? 4 : 1);
     qdev_prop_set_uint8(dev, "num-ss-bits", num_ss);
     qdev_prop_set_uint8(dev, "num-busses", num_busses);
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, base_addr);
     if (is_qspi) {
         sysbus_mmio_map(busdev, 1, 0xFC000000);
@@ -157,12 +157,12 @@ static inline void zynq_init_spi_flashes(uint32_t base_addr, qemu_irq irq,
 
         for (j = 0; j < num_ss; ++j) {
             DriveInfo *dinfo = drive_get_next(IF_MTD);
-            flash_dev = ssi_create_slave_no_init(spi, "n25q128");
+            flash_dev = qdev_new("n25q128");
             if (dinfo) {
                 qdev_prop_set_drive(flash_dev, "drive",
                                     blk_by_legacy_dinfo(dinfo), &error_fatal);
             }
-            qdev_init_nofail(flash_dev);
+            qdev_realize_and_unref(flash_dev, BUS(spi), &error_fatal);
 
             cs_line = qdev_get_gpio_in_named(flash_dev, SSI_GPIO_CS, 0);
             sysbus_connect_irq(busdev, i * num_ss + j + 1, cs_line);
@@ -202,7 +202,7 @@ static void zynq_init(MachineState *machine)
                             &error_fatal);
     object_property_set_int(OBJECT(cpu), MPCORE_PERIPHBASE, "reset-cbar",
                             &error_fatal);
-    object_property_set_bool(OBJECT(cpu), true, "realized", &error_fatal);
+    qdev_realize(DEVICE(cpu), NULL, &error_fatal);
 
     /* DDR remapped to address zero.  */
     memory_region_add_subregion(address_space_mem, 0, machine->ram);
@@ -222,8 +222,8 @@ static void zynq_init(MachineState *machine)
                           0);
 
     /* Create slcr, keep a pointer to connect clocks */
-    slcr = qdev_create(NULL, "xilinx,zynq_slcr");
-    qdev_init_nofail(slcr);
+    slcr = qdev_new("xilinx,zynq_slcr");
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(slcr), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(slcr), 0, 0xF8000000);
 
     /* Create the main clock source, and feed slcr with it */
@@ -234,10 +234,10 @@ static void zynq_init(MachineState *machine)
     clock_set_hz(zynq_machine->ps_clk, PS_CLK_FREQUENCY);
     qdev_connect_clock_in(slcr, "ps_clk", zynq_machine->ps_clk);
 
-    dev = qdev_create(NULL, TYPE_A9MPCORE_PRIV);
+    dev = qdev_new(TYPE_A9MPCORE_PRIV);
     qdev_prop_set_uint32(dev, "num-cpu", 1);
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, MPCORE_PERIPHBASE);
     sysbus_connect_irq(busdev, 0,
                        qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_IRQ));
@@ -280,27 +280,27 @@ static void zynq_init(MachineState *machine)
          * - SDIO Specification Version 2.0
          * - MMC Specification Version 3.31
          */
-        dev = qdev_create(NULL, TYPE_SYSBUS_SDHCI);
+        dev = qdev_new(TYPE_SYSBUS_SDHCI);
         qdev_prop_set_uint8(dev, "sd-spec-version", 2);
         qdev_prop_set_uint64(dev, "capareg", ZYNQ_SDHCI_CAPABILITIES);
-        qdev_init_nofail(dev);
+        sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
         sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, hci_addr);
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, pic[hci_irq - IRQ_OFFSET]);
 
         di = drive_get_next(IF_SD);
         blk = di ? blk_by_legacy_dinfo(di) : NULL;
-        carddev = qdev_create(qdev_get_child_bus(dev, "sd-bus"), TYPE_SD_CARD);
+        carddev = qdev_new(TYPE_SD_CARD);
         qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
-        object_property_set_bool(OBJECT(carddev), true, "realized",
-                                 &error_fatal);
+        qdev_realize_and_unref(carddev, qdev_get_child_bus(dev, "sd-bus"),
+                               &error_fatal);
     }
 
-    dev = qdev_create(NULL, TYPE_ZYNQ_XADC);
-    qdev_init_nofail(dev);
+    dev = qdev_new(TYPE_ZYNQ_XADC);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xF8007100);
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, pic[39-IRQ_OFFSET]);
 
-    dev = qdev_create(NULL, "pl330");
+    dev = qdev_new("pl330");
     qdev_prop_set_uint8(dev, "num_chnls",  8);
     qdev_prop_set_uint8(dev, "num_periph_req",  4);
     qdev_prop_set_uint8(dev, "num_events",  16);
@@ -312,17 +312,17 @@ static void zynq_init(MachineState *machine)
     qdev_prop_set_uint8(dev, "rd_q_dep",  16);
     qdev_prop_set_uint16(dev, "data_buffer_dep",  256);
 
-    qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, 0xF8003000);
     sysbus_connect_irq(busdev, 0, pic[45-IRQ_OFFSET]); /* abort irq line */
     for (n = 0; n < ARRAY_SIZE(dma_irqs); ++n) { /* event irqs */
         sysbus_connect_irq(busdev, n + 1, pic[dma_irqs[n] - IRQ_OFFSET]);
     }
 
-    dev = qdev_create(NULL, "xlnx.ps7-dev-cfg");
-    qdev_init_nofail(dev);
+    dev = qdev_new("xlnx.ps7-dev-cfg");
     busdev = SYS_BUS_DEVICE(dev);
+    sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_connect_irq(busdev, 0, pic[40 - IRQ_OFFSET]);
     sysbus_mmio_map(busdev, 0, 0xF8007000);
 
diff --git a/hw/arm/xlnx-versal-virt.c b/hw/arm/xlnx-versal-virt.c
index 43a71e2eea..5bcca7f95b 100644
--- a/hw/arm/xlnx-versal-virt.c
+++ b/hw/arm/xlnx-versal-virt.c
@@ -432,9 +432,9 @@ static void create_virtio_regions(VersalVirt *s)
         qemu_irq pic_irq;
 
         pic_irq = qdev_get_gpio_in(DEVICE(&s->soc.fpd.apu.gic), irq);
-        dev = qdev_create(NULL, "virtio-mmio");
+        dev = qdev_new("virtio-mmio");
         object_property_add_child(OBJECT(&s->soc), name, OBJECT(dev));
-        qdev_init_nofail(dev);
+        sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, pic_irq);
         mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0);
         memory_region_add_subregion(&s->soc.mr_ps, base, mr);
@@ -463,10 +463,11 @@ static void sd_plugin_card(SDHCIState *sd, DriveInfo *di)
     BlockBackend *blk = di ? blk_by_legacy_dinfo(di) : NULL;
     DeviceState *card;
 
-    card = qdev_create(qdev_get_child_bus(DEVICE(sd), "sd-bus"), TYPE_SD_CARD);
+    card = qdev_new(TYPE_SD_CARD);
     object_property_add_child(OBJECT(sd), "card[*]", OBJECT(card));
     qdev_prop_set_drive(card, "drive", blk, &error_fatal);
-    object_property_set_bool(OBJECT(card), true, "realized", &error_fatal);
+    qdev_realize_and_unref(card, qdev_get_child_bus(DEVICE(sd), "sd-bus"),
+                           &error_fatal);
 }
 
 static void versal_virt_init(MachineState *machine)
@@ -499,13 +500,13 @@ static void versal_virt_init(MachineState *machine)
         psci_conduit = QEMU_PSCI_CONDUIT_SMC;
     }
 
-    sysbus_init_child_obj(OBJECT(machine), "xlnx-versal", &s->soc,
-                          sizeof(s->soc), TYPE_XLNX_VERSAL);
+    object_initialize_child(OBJECT(machine), "xlnx-versal", &s->soc,
+                            TYPE_XLNX_VERSAL);
     object_property_set_link(OBJECT(&s->soc), OBJECT(machine->ram),
                              "ddr", &error_abort);
     object_property_set_int(OBJECT(&s->soc), psci_conduit,
                             "psci-conduit", &error_abort);
-    object_property_set_bool(OBJECT(&s->soc), true, "realized", &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(&s->soc), &error_fatal);
 
     fdt_create(s);
     create_virtio_regions(s);
diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
index 809a31390f..fed9d07ca2 100644
--- a/hw/arm/xlnx-versal.c
+++ b/hw/arm/xlnx-versal.c
@@ -32,9 +32,8 @@ static void versal_create_apu_cpus(Versal *s)
     for (i = 0; i < ARRAY_SIZE(s->fpd.apu.cpu); i++) {
         Object *obj;
 
-        object_initialize_child(OBJECT(s), "apu-cpu[*]",
-                                &s->fpd.apu.cpu[i], sizeof(s->fpd.apu.cpu[i]),
-                                XLNX_VERSAL_ACPU_TYPE, &error_abort, NULL);
+        object_initialize_child(OBJECT(s), "apu-cpu[*]", &s->fpd.apu.cpu[i],
+                                XLNX_VERSAL_ACPU_TYPE);
         obj = OBJECT(&s->fpd.apu.cpu[i]);
         object_property_set_int(obj, s->cfg.psci_conduit,
                                 "psci-conduit", &error_abort);
@@ -48,7 +47,7 @@ static void versal_create_apu_cpus(Versal *s)
                                 "core-count", &error_abort);
         object_property_set_link(obj, OBJECT(&s->fpd.apu.mr), "memory",
                                  &error_abort);
-        object_property_set_bool(obj, true, "realized", &error_fatal);
+        qdev_realize(DEVICE(obj), NULL, &error_fatal);
     }
 }
 
@@ -63,9 +62,8 @@ static void versal_create_apu_gic(Versal *s, qemu_irq *pic)
     int nr_apu_cpus = ARRAY_SIZE(s->fpd.apu.cpu);
     int i;
 
-    sysbus_init_child_obj(OBJECT(s), "apu-gic",
-                          &s->fpd.apu.gic, sizeof(s->fpd.apu.gic),
-                          gicv3_class_name());
+    object_initialize_child(OBJECT(s), "apu-gic", &s->fpd.apu.gic,
+                            gicv3_class_name());
     gicbusdev = SYS_BUS_DEVICE(&s->fpd.apu.gic);
     gicdev = DEVICE(&s->fpd.apu.gic);
     qdev_prop_set_uint32(gicdev, "revision", 3);
@@ -75,8 +73,7 @@ static void versal_create_apu_gic(Versal *s, qemu_irq *pic)
     qdev_prop_set_uint32(gicdev, "redist-region-count[0]", 2);
     qdev_prop_set_bit(gicdev, "has-security-extensions", true);
 
-    object_property_set_bool(OBJECT(&s->fpd.apu.gic), true, "realized",
-                                    &error_fatal);
+    sysbus_realize(SYS_BUS_DEVICE(&s->fpd.apu.gic), &error_fatal);
 
     for (i = 0; i < ARRAY_SIZE(addrs); i++) {
         MemoryRegion *mr;
@@ -134,12 +131,11 @@ static void versal_create_uarts(Versal *s, qemu_irq *pic)
         DeviceState *dev;
         MemoryRegion *mr;
 
-        sysbus_init_child_obj(OBJECT(s), name,
-                              &s->lpd.iou.uart[i], sizeof(s->lpd.iou.uart[i]),
-                              TYPE_PL011);
+        object_initialize_child(OBJECT(s), name, &s->lpd.iou.uart[i],
+                                TYPE_PL011);
         dev = DEVICE(&s->lpd.iou.uart[i]);
         qdev_prop_set_chr(dev, "chardev", serial_hd(i));
-        qdev_init_nofail(dev);
+        sysbus_realize(SYS_BUS_DEVICE(dev), &error_fatal);
 
         mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0);
         memory_region_add_subregion(&s->mr_ps, addrs[i], mr);
@@ -161,9 +157,8 @@ static void versal_create_gems(Versal *s, qemu_irq *pic)
         DeviceState *dev;
         MemoryRegion *mr;
 
-        sysbus_init_child_obj(OBJECT(s), name,
-                              &s->lpd.iou.gem[i], sizeof(s->lpd.iou.gem[i]),
-                              TYPE_CADENCE_GEM);
+        object_initialize_child(OBJECT(s), name, &s->lpd.iou.gem[i],
+                                TYPE_CADENCE_GEM);
         dev = DEVICE(&s->lpd.iou.gem[i]);
         if (nd->used) {
             qemu_check_nic_model(nd, "cadence_gem");
@@ -175,7 +170,7 @@ static void versal_create_gems(Versal *s, qemu_irq *pic)
         object_property_set_link(OBJECT(dev),
                                  OBJECT(&s->mr_ps), "dma",
                                  &error_abort);
-        qdev_init_nofail(dev);
+        sysbus_realize(SYS_BUS_DEVICE(dev), &error_fatal);
 
         mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0);
         memory_region_add_subregion(&s->mr_ps, addrs[i], mr);
@@ -194,12 +189,11 @@ static void versal_create_admas(Versal *s, qemu_irq *pic)
         DeviceState *dev;
         MemoryRegion *mr;
 
-        sysbus_init_child_obj(OBJECT(s), name,
-                              &s->lpd.iou.adma[i], sizeof(s->lpd.iou.adma[i]),
-                              TYPE_XLNX_ZDMA);
+        object_initialize_child(OBJECT(s), name, &s->lpd.iou.adma[i],
+                                TYPE_XLNX_ZDMA);
         dev = DEVICE(&s->lpd.iou.adma[i]);
         object_property_set_int(OBJECT(dev), 128, "bus-width", &error_abort);
-        qdev_init_nofail(dev);
+        sysbus_realize(SYS_BUS_DEVICE(dev), &error_fatal);
 
         mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0);
         memory_region_add_subregion(&s->mr_ps,
@@ -219,9 +213,8 @@ static void versal_create_sds(Versal *s, qemu_irq *pic)
         DeviceState *dev;
         MemoryRegion *mr;
 
-        sysbus_init_child_obj(OBJECT(s), "sd[*]",
-                              &s->pmc.iou.sd[i], sizeof(s->pmc.iou.sd[i]),
-                              TYPE_SYSBUS_SDHCI);
+        object_initialize_child(OBJECT(s), "sd[*]", &s->pmc.iou.sd[i],
+                                TYPE_SYSBUS_SDHCI);
         dev = DEVICE(&s->pmc.iou.sd[i]);
 
         object_property_set_uint(OBJECT(dev),
@@ -229,7 +222,7 @@ static void versal_create_sds(Versal *s, qemu_irq *pic)
         object_property_set_uint(OBJECT(dev), SDHCI_CAPABILITIES, "capareg",
                                  &error_fatal);
         object_property_set_uint(OBJECT(dev), UHS_I, "uhs", &error_fatal);
-        qdev_init_nofail(dev);
+        sysbus_realize(SYS_BUS_DEVICE(dev), &error_fatal);
 
         mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0);
         memory_region_add_subregion(&s->mr_ps,
@@ -245,10 +238,10 @@ static void versal_create_rtc(Versal *s, qemu_irq *pic)
     SysBusDevice *sbd;
     MemoryRegion *mr;
 
-    sysbus_init_child_obj(OBJECT(s), "rtc", &s->pmc.rtc, sizeof(s->pmc.rtc),
-                          TYPE_XLNX_ZYNQMP_RTC);
+    object_initialize_child(OBJECT(s), "rtc", &s->pmc.rtc,
+                            TYPE_XLNX_ZYNQMP_RTC);
     sbd = SYS_BUS_DEVICE(&s->pmc.rtc);
-    qdev_init_nofail(DEVICE(sbd));
+    sysbus_realize(SYS_BUS_DEVICE(sbd), &error_fatal);
 
     mr = sysbus_mmio_get_region(sbd, 0);
     memory_region_add_subregion(&s->mr_ps, MM_PMC_RTC, mr);
@@ -304,13 +297,13 @@ static void versal_unimp_area(Versal *s, const char *name,
                                 MemoryRegion *mr,
                                 hwaddr base, hwaddr size)
 {
-    DeviceState *dev = qdev_create(NULL, TYPE_UNIMPLEMENTED_DEVICE);
+    DeviceState *dev = qdev_new(TYPE_UNIMPLEMENTED_DEVICE);
     MemoryRegion *mr_dev;
 
     qdev_prop_set_string(dev, "name", name);
     qdev_prop_set_uint64(dev, "size", size);
     object_property_add_child(OBJECT(s), name, OBJECT(dev));
-    qdev_init_nofail(dev);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     mr_dev = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0);
     memory_region_add_subregion(mr, base, mr_dev);
diff --git a/hw/arm/xlnx-zcu102.c b/hw/arm/xlnx-zcu102.c
index b01e575b58..b920bcee94 100644
--- a/hw/arm/xlnx-zcu102.c
+++ b/hw/arm/xlnx-zcu102.c
@@ -116,8 +116,7 @@ static void xlnx_zcu102_init(MachineState *machine)
                  ram_size);
     }
 
-    object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
-                            TYPE_XLNX_ZYNQMP, &error_abort, NULL);
+    object_initialize_child(OBJECT(machine), "soc", &s->soc, TYPE_XLNX_ZYNQMP);
 
     object_property_set_link(OBJECT(&s->soc), OBJECT(machine->ram),
                          "ddr-ram", &error_abort);
@@ -126,7 +125,7 @@ static void xlnx_zcu102_init(MachineState *machine)
     object_property_set_bool(OBJECT(&s->soc), s->virt, "virtualization",
                              &error_fatal);
 
-    object_property_set_bool(OBJECT(&s->soc), true, "realized", &error_fatal);
+    qdev_realize(DEVICE(&s->soc), NULL, &error_fatal);
 
     /* Create and plug in the SD cards */
     for (i = 0; i < XLNX_ZYNQMP_NUM_SDHCI; i++) {
@@ -143,28 +142,27 @@ static void xlnx_zcu102_init(MachineState *machine)
             error_report("No SD bus found for SD card %d", i);
             exit(1);
         }
-        carddev = qdev_create(bus, TYPE_SD_CARD);
+        carddev = qdev_new(TYPE_SD_CARD);
         qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
-        object_property_set_bool(OBJECT(carddev), true, "realized",
-                                 &error_fatal);
+        qdev_realize_and_unref(carddev, bus, &error_fatal);
     }
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_SPIS; i++) {
-        SSIBus *spi_bus;
+        BusState *spi_bus;
         DeviceState *flash_dev;
         qemu_irq cs_line;
         DriveInfo *dinfo = drive_get_next(IF_MTD);
         gchar *bus_name = g_strdup_printf("spi%d", i);
 
-        spi_bus = (SSIBus *)qdev_get_child_bus(DEVICE(&s->soc), bus_name);
+        spi_bus = qdev_get_child_bus(DEVICE(&s->soc), bus_name);
         g_free(bus_name);
 
-        flash_dev = ssi_create_slave_no_init(spi_bus, "sst25wf080");
+        flash_dev = qdev_new("sst25wf080");
         if (dinfo) {
             qdev_prop_set_drive(flash_dev, "drive", blk_by_legacy_dinfo(dinfo),
                                 &error_fatal);
         }
-        qdev_init_nofail(flash_dev);
+        qdev_realize_and_unref(flash_dev, spi_bus, &error_fatal);
 
         cs_line = qdev_get_gpio_in_named(flash_dev, SSI_GPIO_CS, 0);
 
@@ -172,22 +170,22 @@ static void xlnx_zcu102_init(MachineState *machine)
     }
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_QSPI_FLASH; i++) {
-        SSIBus *spi_bus;
+        BusState *spi_bus;
         DeviceState *flash_dev;
         qemu_irq cs_line;
         DriveInfo *dinfo = drive_get_next(IF_MTD);
         int bus = i / XLNX_ZYNQMP_NUM_QSPI_BUS_CS;
         gchar *bus_name = g_strdup_printf("qspi%d", bus);
 
-        spi_bus = (SSIBus *)qdev_get_child_bus(DEVICE(&s->soc), bus_name);
+        spi_bus = qdev_get_child_bus(DEVICE(&s->soc), bus_name);
         g_free(bus_name);
 
-        flash_dev = ssi_create_slave_no_init(spi_bus, "n25q512a11");
+        flash_dev = qdev_new("n25q512a11");
         if (dinfo) {
             qdev_prop_set_drive(flash_dev, "drive", blk_by_legacy_dinfo(dinfo),
                                 &error_fatal);
         }
-        qdev_init_nofail(flash_dev);
+        qdev_realize_and_unref(flash_dev, spi_bus, &error_fatal);
 
         cs_line = qdev_get_gpio_in_named(flash_dev, SSI_GPIO_CS, 0);
 
diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
index f08abf60d7..1de9d4a89d 100644
--- a/hw/arm/xlnx-zynqmp.c
+++ b/hw/arm/xlnx-zynqmp.c
@@ -187,17 +187,15 @@ static void xlnx_zynqmp_create_rpu(MachineState *ms, XlnxZynqMPState *s,
     }
 
     object_initialize_child(OBJECT(s), "rpu-cluster", &s->rpu_cluster,
-                            sizeof(s->rpu_cluster), TYPE_CPU_CLUSTER,
-                            &error_abort, NULL);
+                            TYPE_CPU_CLUSTER);
     qdev_prop_set_uint32(DEVICE(&s->rpu_cluster), "cluster-id", 1);
 
     for (i = 0; i < num_rpus; i++) {
         char *name;
 
         object_initialize_child(OBJECT(&s->rpu_cluster), "rpu-cpu[*]",
-                                &s->rpu_cpu[i], sizeof(s->rpu_cpu[i]),
-                                ARM_CPU_TYPE_NAME("cortex-r5f"),
-                                &error_abort, NULL);
+                                &s->rpu_cpu[i],
+                                ARM_CPU_TYPE_NAME("cortex-r5f"));
 
         name = object_get_canonical_path_component(OBJECT(&s->rpu_cpu[i]));
         if (strcmp(name, boot_cpu)) {
@@ -211,15 +209,14 @@ static void xlnx_zynqmp_create_rpu(MachineState *ms, XlnxZynqMPState *s,
 
         object_property_set_bool(OBJECT(&s->rpu_cpu[i]), true, "reset-hivecs",
                                  &error_abort);
-        object_property_set_bool(OBJECT(&s->rpu_cpu[i]), true, "realized",
-                                 &err);
+        qdev_realize(DEVICE(&s->rpu_cpu[i]), NULL, &err);
         if (err) {
             error_propagate(errp, err);
             return;
         }
     }
 
-    qdev_init_nofail(DEVICE(&s->rpu_cluster));
+    qdev_realize(DEVICE(&s->rpu_cluster), NULL, &error_fatal);
 }
 
 static void xlnx_zynqmp_init(Object *obj)
@@ -230,65 +227,53 @@ static void xlnx_zynqmp_init(Object *obj)
     int num_apus = MIN(ms->smp.cpus, XLNX_ZYNQMP_NUM_APU_CPUS);
 
     object_initialize_child(obj, "apu-cluster", &s->apu_cluster,
-                            sizeof(s->apu_cluster), TYPE_CPU_CLUSTER,
-                            &error_abort, NULL);
+                            TYPE_CPU_CLUSTER);
     qdev_prop_set_uint32(DEVICE(&s->apu_cluster), "cluster-id", 0);
 
     for (i = 0; i < num_apus; i++) {
         object_initialize_child(OBJECT(&s->apu_cluster), "apu-cpu[*]",
-                                &s->apu_cpu[i], sizeof(s->apu_cpu[i]),
-                                ARM_CPU_TYPE_NAME("cortex-a53"),
-                                &error_abort, NULL);
+                                &s->apu_cpu[i],
+                                ARM_CPU_TYPE_NAME("cortex-a53"));
     }
 
-    sysbus_init_child_obj(obj, "gic", &s->gic, sizeof(s->gic),
-                          gic_class_name());
+    object_initialize_child(obj, "gic", &s->gic, gic_class_name());
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_GEMS; i++) {
-        sysbus_init_child_obj(obj, "gem[*]", &s->gem[i], sizeof(s->gem[i]),
-                              TYPE_CADENCE_GEM);
+        object_initialize_child(obj, "gem[*]", &s->gem[i], TYPE_CADENCE_GEM);
     }
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_UARTS; i++) {
-        sysbus_init_child_obj(obj, "uart[*]", &s->uart[i], sizeof(s->uart[i]),
-                              TYPE_CADENCE_UART);
+        object_initialize_child(obj, "uart[*]", &s->uart[i],
+                                TYPE_CADENCE_UART);
     }
 
-    sysbus_init_child_obj(obj, "sata", &s->sata, sizeof(s->sata),
-                          TYPE_SYSBUS_AHCI);
+    object_initialize_child(obj, "sata", &s->sata, TYPE_SYSBUS_AHCI);
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_SDHCI; i++) {
-        sysbus_init_child_obj(obj, "sdhci[*]", &s->sdhci[i],
-                              sizeof(s->sdhci[i]), TYPE_SYSBUS_SDHCI);
+        object_initialize_child(obj, "sdhci[*]", &s->sdhci[i],
+                                TYPE_SYSBUS_SDHCI);
     }
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_SPIS; i++) {
-        sysbus_init_child_obj(obj, "spi[*]", &s->spi[i], sizeof(s->spi[i]),
-                              TYPE_XILINX_SPIPS);
+        object_initialize_child(obj, "spi[*]", &s->spi[i], TYPE_XILINX_SPIPS);
     }
 
-    sysbus_init_child_obj(obj, "qspi", &s->qspi, sizeof(s->qspi),
-                          TYPE_XLNX_ZYNQMP_QSPIPS);
+    object_initialize_child(obj, "qspi", &s->qspi, TYPE_XLNX_ZYNQMP_QSPIPS);
 
-    sysbus_init_child_obj(obj, "xxxdp", &s->dp, sizeof(s->dp), TYPE_XLNX_DP);
+    object_initialize_child(obj, "xxxdp", &s->dp, TYPE_XLNX_DP);
 
-    sysbus_init_child_obj(obj, "dp-dma", &s->dpdma, sizeof(s->dpdma),
-                          TYPE_XLNX_DPDMA);
+    object_initialize_child(obj, "dp-dma", &s->dpdma, TYPE_XLNX_DPDMA);
 
-    sysbus_init_child_obj(obj, "ipi", &s->ipi, sizeof(s->ipi),
-                          TYPE_XLNX_ZYNQMP_IPI);
+    object_initialize_child(obj, "ipi", &s->ipi, TYPE_XLNX_ZYNQMP_IPI);
 
-    sysbus_init_child_obj(obj, "rtc", &s->rtc, sizeof(s->rtc),
-                          TYPE_XLNX_ZYNQMP_RTC);
+    object_initialize_child(obj, "rtc", &s->rtc, TYPE_XLNX_ZYNQMP_RTC);
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_GDMA_CH; i++) {
-        sysbus_init_child_obj(obj, "gdma[*]", &s->gdma[i], sizeof(s->gdma[i]),
-                              TYPE_XLNX_ZDMA);
+        object_initialize_child(obj, "gdma[*]", &s->gdma[i], TYPE_XLNX_ZDMA);
     }
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_ADMA_CH; i++) {
-        sysbus_init_child_obj(obj, "adma[*]", &s->adma[i], sizeof(s->adma[i]),
-                              TYPE_XLNX_ZDMA);
+        object_initialize_child(obj, "adma[*]", &s->adma[i], TYPE_XLNX_ZDMA);
     }
 }
 
@@ -355,7 +340,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     qdev_prop_set_bit(DEVICE(&s->gic),
                       "has-virtualization-extensions", s->virt);
 
-    qdev_init_nofail(DEVICE(&s->apu_cluster));
+    qdev_realize(DEVICE(&s->apu_cluster), NULL, &error_fatal);
 
     /* Realize APUs before realizing the GIC. KVM requires this.  */
     for (i = 0; i < num_apus; i++) {
@@ -382,15 +367,14 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
                                 "reset-cbar", &error_abort);
         object_property_set_int(OBJECT(&s->apu_cpu[i]), num_apus,
                                 "core-count", &error_abort);
-        object_property_set_bool(OBJECT(&s->apu_cpu[i]), true, "realized",
-                                 &err);
+        qdev_realize(DEVICE(&s->apu_cpu[i]), NULL, &err);
         if (err) {
             error_propagate(errp, err);
             return;
         }
     }
 
-    object_property_set_bool(OBJECT(&s->gic), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->gic), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -486,7 +470,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
                                 &error_abort);
         object_property_set_int(OBJECT(&s->gem[i]), 2, "num-priority-queues",
                                 &error_abort);
-        object_property_set_bool(OBJECT(&s->gem[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->gem[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -498,7 +482,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_UARTS; i++) {
         qdev_prop_set_chr(DEVICE(&s->uart[i]), "chardev", serial_hd(i));
-        object_property_set_bool(OBJECT(&s->uart[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->uart[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -510,7 +494,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
 
     object_property_set_int(OBJECT(&s->sata), SATA_NUM_PORTS, "num-ports",
                             &error_abort);
-    object_property_set_bool(OBJECT(&s->sata), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->sata), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -544,7 +528,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
             error_propagate(errp, err);
             return;
         }
-        object_property_set_bool(sdhci, true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(sdhci), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -561,7 +545,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     for (i = 0; i < XLNX_ZYNQMP_NUM_SPIS; i++) {
         gchar *bus_name;
 
-        object_property_set_bool(OBJECT(&s->spi[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -578,7 +562,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
         g_free(bus_name);
     }
 
-    object_property_set_bool(OBJECT(&s->qspi), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->qspi), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -600,7 +584,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
         g_free(target_bus);
     }
 
-    object_property_set_bool(OBJECT(&s->dp), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->dp), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -608,7 +592,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->dp), 0, DP_ADDR);
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->dp), 0, gic_spi[DP_IRQ]);
 
-    object_property_set_bool(OBJECT(&s->dpdma), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->dpdma), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -618,7 +602,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->dpdma), 0, DPDMA_ADDR);
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->dpdma), 0, gic_spi[DPDMA_IRQ]);
 
-    object_property_set_bool(OBJECT(&s->ipi), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->ipi), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -626,7 +610,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->ipi), 0, IPI_ADDR);
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->ipi), 0, gic_spi[IPI_IRQ]);
 
-    object_property_set_bool(OBJECT(&s->rtc), true, "realized", &err);
+    sysbus_realize(SYS_BUS_DEVICE(&s->rtc), &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -640,7 +624,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
             error_propagate(errp, err);
             return;
         }
-        object_property_set_bool(OBJECT(&s->gdma[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->gdma[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;
@@ -652,7 +636,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     }
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_ADMA_CH; i++) {
-        object_property_set_bool(OBJECT(&s->adma[i]), true, "realized", &err);
+        sysbus_realize(SYS_BUS_DEVICE(&s->adma[i]), &err);
         if (err) {
             error_propagate(errp, err);
             return;