hw/misc: Add support for ADC controller in Xilinx Zynq 7000

Add support for the Xilinx XADC core used in Zynq 7000.

References:
- Zynq-7000 All Programmable SoC Technical Reference Manual
- 7 Series FPGAs and Zynq-7000 All Programmable SoC XADC
  Dual 12-Bit 1 MSPS Analog-to-Digital Converter

Tested with Linux using QEMU machine xilinx-zynq-a9 with devicetree
files zynq-zc702.dtb and zynq-zc706.dtb, and kernel configuration
multi_v7_defconfig.

Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
[ PC changes:
  * Changed macro names to match TRM where possible
  * Made programmers model macro scheme consistent
  * Dropped XADC_ZYNQ_ prefix on local macros
  * Fix ALM field width
  * Update threshold-comparison interrupts in _update_ints()
  * factored out DFIFO pushes into helper. Renamed to "push/pop"
  * Changed xadc_reg to 10 bits and added OOB check.
  * Reduced scope of MCTL reset to just stop channel coms.
  * Added dummy read data to write commands
  * Changed _ to - seperators in string names and filenames
  * Dropped ------------ in header comment
  * Catchall'ed _update_ints() in _write handler.
  * Minor whitespace changes.
  * Use ZYNQ_XADC_FIFO_DEPTH instead of ARRAY_SIZE()
]
Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/hw/arm/xilinx_zynq.c b/hw/arm/xilinx_zynq.c
index 82a9db8120..1c1a44547f 100644
--- a/hw/arm/xilinx_zynq.c
+++ b/hw/arm/xilinx_zynq.c
@@ -24,6 +24,7 @@
 #include "hw/block/flash.h"
 #include "sysemu/block-backend.h"
 #include "hw/loader.h"
+#include "hw/misc/zynq-xadc.h"
 #include "hw/ssi.h"
 #include "qemu/error-report.h"
 
@@ -264,6 +265,11 @@ static void zynq_init(MachineState *machine)
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xE0101000);
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, pic[79-IRQ_OFFSET]);
 
+    dev = qdev_create(NULL, TYPE_ZYNQ_XADC);
+    qdev_init_nofail(dev);
+    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");
     qdev_prop_set_uint8(dev, "num_chnls",  8);
     qdev_prop_set_uint8(dev, "num_periph_req",  4);