[PATCH 16/18] hw/riscv: microchip_pfsoc: Hook GPIO controllers

[Bin Meng]

From: Bin Meng <bin.m...@windriver.com>

Microchip PolarFire SoC integrates 3 GPIOs controllers. It seems
enough to create unimplemented devices to cover their register
spaces at this point.

With this commit, QEMU can boot to U-Boot (2nd stage bootloader)
all the way to the Linux shell login prompt, with a modified HSS
(1st stage bootloader).

Signed-off-by: Bin Meng <bin.m...@windriver.com>
---

 hw/riscv/microchip_pfsoc.c         | 14 ++++++++++++++
 include/hw/riscv/microchip_pfsoc.h |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c
index 625b511..139284a 100644
--- a/hw/riscv/microchip_pfsoc.c
+++ b/hw/riscv/microchip_pfsoc.c
@@ -89,6 +89,9 @@ static const struct MemmapEntry {
     [MICROCHIP_PFSOC_MMUART4] =         { 0x20106000,     0x1000 },
     [MICROCHIP_PFSOC_GEM0] =            { 0x20110000,     0x2000 },
     [MICROCHIP_PFSOC_GEM1] =            { 0x20112000,     0x2000 },
+    [MICROCHIP_PFSOC_GPIO0] =           { 0x20120000,     0x1000 },
+    [MICROCHIP_PFSOC_GPIO1] =           { 0x20121000,     0x1000 },
+    [MICROCHIP_PFSOC_GPIO2] =           { 0x20122000,     0x1000 },
     [MICROCHIP_PFSOC_ENVM_CFG] =        { 0x20200000,     0x1000 },
     [MICROCHIP_PFSOC_ENVM_DATA] =       { 0x20220000,    0x20000 },
     [MICROCHIP_PFSOC_IOSCB_CFG] =       { 0x37080000,     0x1000 },
@@ -308,6 +311,17 @@ static void microchip_pfsoc_soc_realize(DeviceState *dev, 
Error **errp)
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->gem1), 0,
         qdev_get_gpio_in(DEVICE(s->plic), MICROCHIP_PFSOC_GEM1_IRQ));
 
+    /* GPIOs */
+    create_unimplemented_device("microchip.pfsoc.gpio0",
+        memmap[MICROCHIP_PFSOC_GPIO0].base,
+        memmap[MICROCHIP_PFSOC_GPIO0].size);
+    create_unimplemented_device("microchip.pfsoc.gpio1",
+        memmap[MICROCHIP_PFSOC_GPIO1].base,
+        memmap[MICROCHIP_PFSOC_GPIO1].size);
+    create_unimplemented_device("microchip.pfsoc.gpio2",
+        memmap[MICROCHIP_PFSOC_GPIO2].base,
+        memmap[MICROCHIP_PFSOC_GPIO2].size);
+
     /* eNVM */
     memory_region_init_rom(envm_data, OBJECT(dev), "microchip.pfsoc.envm.data",
                            memmap[MICROCHIP_PFSOC_ENVM_DATA].size,
diff --git a/include/hw/riscv/microchip_pfsoc.h 
b/include/hw/riscv/microchip_pfsoc.h
index 60f994c..993b17c 100644
--- a/include/hw/riscv/microchip_pfsoc.h
+++ b/include/hw/riscv/microchip_pfsoc.h
@@ -89,6 +89,9 @@ enum {
     MICROCHIP_PFSOC_MMUART4,
     MICROCHIP_PFSOC_GEM0,
     MICROCHIP_PFSOC_GEM1,
+    MICROCHIP_PFSOC_GPIO0,
+    MICROCHIP_PFSOC_GPIO1,
+    MICROCHIP_PFSOC_GPIO2,
     MICROCHIP_PFSOC_ENVM_CFG,
     MICROCHIP_PFSOC_ENVM_DATA,
     MICROCHIP_PFSOC_IOSCB_CFG,
-- 
2.7.4