aspeed/soc: Support GPIO for AST2700

Add GPIO model for AST2700 GPIO support. The GPIO controller registers base
address is start at 0x14C0_B000 and its address space is 0x1000.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>

hw/arm/aspeed_ast27x0.c

@@ -62,6 +62,7 @@ static const hwaddr aspeed_soc_ast2700_memmap[] = {
     [ASPEED_GIC_REDIST]    =  0x12280000,
     [ASPEED_DEV_ADC]       =  0x14C00000,
     [ASPEED_DEV_I2C]       =  0x14C0F000,
+    [ASPEED_DEV_GPIO]      =  0x14C0B000,
 };
 
 #define AST2700_MAX_IRQ 288
@@ -372,6 +373,9 @@ static void aspeed_soc_ast2700_init(Object *obj)
 
     snprintf(typename, sizeof(typename), "aspeed.i2c-%s", socname);
     object_initialize_child(obj, "i2c", &s->i2c, typename);
+
+    snprintf(typename, sizeof(typename), "aspeed.gpio-%s", socname);
+    object_initialize_child(obj, "gpio", &s->gpio, typename);
 }
 
 /*
@@ -657,6 +661,15 @@ static void aspeed_soc_ast2700_realize(DeviceState *dev, Error **errp)
         sysbus_connect_irq(SYS_BUS_DEVICE(&s->i2c.busses[i]), 0, irq);
     }
 
+    /* GPIO */
+    if (!sysbus_realize(SYS_BUS_DEVICE(&s->gpio), errp)) {
+        return;
+    }
+    aspeed_mmio_map(s, SYS_BUS_DEVICE(&s->gpio), 0,
+                    sc->memmap[ASPEED_DEV_GPIO]);
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->gpio), 0,
+                       aspeed_soc_get_irq(s, ASPEED_DEV_GPIO));
+
     create_unimplemented_device("ast2700.dpmcu", 0x11000000, 0x40000);
     create_unimplemented_device("ast2700.iomem0", 0x12000000, 0x01000000);
     create_unimplemented_device("ast2700.iomem1", 0x14000000, 0x01000000);