hw/char: QOM'ify lm32_uart.c

* Drop the old SysBus init function and use instance_init
* Call qemu_chr_add_handlers in the realize callback
* Use qdev chardev prop instead of qemu_char_get_next_serial
* Add lm32_uart_create function to create lm32 uart device

Signed-off-by: xiaoqiang zhao <zxq_yx_007@163.com>
Message-Id: <1464158344-12266-5-git-send-email-zxq_yx_007@163.com>
Tested-by: Michael Walle <michael@walle.cc>
Acked-by: Michael Walle <michael@walle.cc>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 17 insertions, 11 deletions

diff --git a/hw/char/lm32_uart.c b/hw/char/lm32_uart.c
index 036813d0f3..b5c760dda3 100644
--- a/hw/char/lm32_uart.c
+++ b/hw/char/lm32_uart.c
@@ -249,23 +249,25 @@ static void uart_reset(DeviceState *d)
     s->regs[R_LSR] = LSR_THRE | LSR_TEMT;
 }
 
-static int lm32_uart_init(SysBusDevice *dev)
+static void lm32_uart_init(Object *obj)
 {
-    LM32UartState *s = LM32_UART(dev);
+    LM32UartState *s = LM32_UART(obj);
+    SysBusDevice *dev = SYS_BUS_DEVICE(obj);
 
     sysbus_init_irq(dev, &s->irq);
 
-    memory_region_init_io(&s->iomem, OBJECT(s), &uart_ops, s,
+    memory_region_init_io(&s->iomem, obj, &uart_ops, s,
                           "uart", R_MAX * 4);
     sysbus_init_mmio(dev, &s->iomem);
+}
+
+static void lm32_uart_realize(DeviceState *dev, Error **errp)
+{
+    LM32UartState *s = LM32_UART(dev);
 
-    /* FIXME use a qdev chardev prop instead of qemu_char_get_next_serial() */
-    s->chr = qemu_char_get_next_serial();
     if (s->chr) {
         qemu_chr_add_handlers(s->chr, uart_can_rx, uart_rx, uart_event, s);
     }
-
-    return 0;
 }
 
 static const VMStateDescription vmstate_lm32_uart = {
@@ -278,22 +280,26 @@ static const VMStateDescription vmstate_lm32_uart = {
     }
 };
 
+static Property lm32_uart_properties[] = {
+    DEFINE_PROP_CHR("chardev", LM32UartState, chr),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void lm32_uart_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
-    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 
-    k->init = lm32_uart_init;
     dc->reset = uart_reset;
     dc->vmsd = &vmstate_lm32_uart;
-    /* Reason: init() method uses qemu_char_get_next_serial() */
-    dc->cannot_instantiate_with_device_add_yet = true;
+    dc->props = lm32_uart_properties;
+    dc->realize = lm32_uart_realize;
 }
 
 static const TypeInfo lm32_uart_info = {
     .name          = TYPE_LM32_UART,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(LM32UartState),
+    .instance_init = lm32_uart_init,
     .class_init    = lm32_uart_class_init,
 };