[PATCH 1/3] hw/gpio/aspeed_gpio: Add gpios in/out init

[Jian Zhang]

Add gpios in/out init for aspeed gpio to add the ability to connect
to other gpio devices.

Based the qdev-core.h comments, If you want to connect a GPIO to other
devices, you need to call qdev_init_gpio_in() or qdev_init_gpio_out().

```
For input gpios:
 *
 * Outbound GPIO lines can be connected to any qemu_irq, but the common
 * case is connecting them to another device's inbound GPIO line, using
 * the qemu_irq returned by qdev_get_gpio_in() or qdev_get_gpio_in_named().

For output gpios:
 * This function is intended to be used by board code or SoC "container"
 * device models to wire up the GPIO lines; usually the return value
 * will be passed to qdev_connect_gpio_out() or a similar function to
 * connect another device's output GPIO line to this input.
```

Signed-off-by: Jian Zhang <zhangjian.3032@bytedance.com>
---
 hw/gpio/aspeed_gpio.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/hw/gpio/aspeed_gpio.c b/hw/gpio/aspeed_gpio.c
index e99c4c6329..616ec8db52 100644
--- a/hw/gpio/aspeed_gpio.c
+++ b/hw/gpio/aspeed_gpio.c
@@ -1018,6 +1018,17 @@ static void aspeed_gpio_reset(DeviceState *dev)
     memset(s->sets, 0, sizeof(s->sets));
 }
 
+static void aspeed_gpio_set(void *opaque, int line, int new_state)
+{
+    AspeedGPIOState *s = ASPEED_GPIO(opaque);
+    uint32_t set_idx, pin;
+
+    set_idx = line / ASPEED_GPIOS_PER_SET;
+    pin = line % ASPEED_GPIOS_PER_SET;
+
+    aspeed_gpio_set_pin_level(s, set_idx, pin, new_state);
+}
+
 static void aspeed_gpio_realize(DeviceState *dev, Error **errp)
 {
     AspeedGPIOState *s = ASPEED_GPIO(dev);
@@ -1042,6 +1053,12 @@ static void aspeed_gpio_realize(DeviceState *dev, Error 
**errp)
     memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_gpio_ops, s,
             TYPE_ASPEED_GPIO, 0x800);
 
+    /* TODO: Maybe could in named, not anonymous is better */
+    qdev_init_gpio_out(dev, &s->gpios[0][0],
+                       ASPEED_GPIO_MAX_NR_SETS * ASPEED_GPIOS_PER_SET);
+    qdev_init_gpio_in(dev, aspeed_gpio_set,
+                      ASPEED_GPIO_MAX_NR_SETS * ASPEED_GPIOS_PER_SET);
+
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
-- 
2.25.1