[PATCH 05/11] hw/gpio/avr_gpio: Add 'id' field in AVRGPIOState

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

AVR MCU have various GPIO ports. Add an 'id' property to distinct
all instances.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 include/hw/gpio/avr_gpio.h |  1 +
 hw/avr/atmega.c            |  1 +
 hw/gpio/avr_gpio.c         | 14 ++++++++++++--
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/include/hw/gpio/avr_gpio.h b/include/hw/gpio/avr_gpio.h
index 498a7275f05..e982f627ea3 100644
--- a/include/hw/gpio/avr_gpio.h
+++ b/include/hw/gpio/avr_gpio.h
@@ -48,6 +48,7 @@ struct AVRGPIOState {
     /* PORTx data changed IRQs */
     qemu_irq out[8u];
 
+    uint8_t id;
 };
 
 #endif /* AVR_GPIO_H */
diff --git a/hw/avr/atmega.c b/hw/avr/atmega.c
index 19c3122189f..a19e3035022 100644
--- a/hw/avr/atmega.c
+++ b/hw/avr/atmega.c
@@ -285,6 +285,7 @@ static void atmega_realize(DeviceState *dev, Error **errp)
         devname = g_strdup_printf("atmega-gpio-%c", 'a' + (char)i);
         object_initialize_child(OBJECT(dev), devname, &s->gpio[i],
                                 TYPE_AVR_GPIO);
+        qdev_prop_set_uint8(DEVICE(&s->gpio[i]), "id", i);
         sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), &error_abort);
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpio[i]), 0,
                         OFFSET_DATA + mc->dev[idx].addr);
diff --git a/hw/gpio/avr_gpio.c b/hw/gpio/avr_gpio.c
index da34009daea..3db55bfa77f 100644
--- a/hw/gpio/avr_gpio.c
+++ b/hw/gpio/avr_gpio.c
@@ -113,6 +113,11 @@ static const VMStateDescription avr_gpio_vmstate = {
     },
 };
 
+static Property avr_gpio_properties[] = {
+    DEFINE_PROP_UINT8("id", AVRGPIOState, id, UINT8_MAX),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void avr_gpio_init(Object *obj)
 {
     AVRGPIOState *s = AVR_GPIO(obj);
@@ -123,9 +128,13 @@ static void avr_gpio_init(Object *obj)
 }
 static void avr_gpio_realize(DeviceState *dev, Error **errp)
 {
-    /* Do nothing currently */
-}
+    AVRGPIOState *s = AVR_GPIO(dev);
 
+    if (s->id == UINT8_MAX) {
+        error_setg(errp, "property 'id' not set");
+        return;
+    }
+}
 
 static void avr_gpio_class_init(ObjectClass *klass, void *data)
 {
@@ -134,6 +143,7 @@ static void avr_gpio_class_init(ObjectClass *klass, void *data)
     dc->reset = avr_gpio_reset;
     dc->realize = avr_gpio_realize;
     dc->vmsd = &avr_gpio_vmstate;
+    device_class_set_props(dc, avr_gpio_properties);
 }
 
 static const TypeInfo avr_gpio_info = {
-- 
2.26.2