hw/riscv: sifive_u: Hook a GPIO controller

SiFive FU540 SoC integrates a GPIO controller with 16 GPIO lines.
This hooks the exsiting SiFive GPIO model to the SoC, and adds its
device tree data as well.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 1591625864-31494-8-git-send-email-bmeng.cn@gmail.com
Message-Id: <1591625864-31494-8-git-send-email-bmeng.cn@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
diff --git a/include/hw/riscv/sifive_u.h b/include/hw/riscv/sifive_u.h
index 5f62cf5..b1399a9 100644
--- a/include/hw/riscv/sifive_u.h
+++ b/include/hw/riscv/sifive_u.h
@@ -22,6 +22,7 @@
 #include "hw/net/cadence_gem.h"
 #include "hw/riscv/riscv_hart.h"
 #include "hw/riscv/sifive_cpu.h"
+#include "hw/riscv/sifive_gpio.h"
 #include "hw/riscv/sifive_u_prci.h"
 #include "hw/riscv/sifive_u_otp.h"
 
@@ -40,6 +41,7 @@
     RISCVHartArrayState u_cpus;
     DeviceState *plic;
     SiFiveUPRCIState prci;
+    SIFIVEGPIOState gpio;
     SiFiveUOTPState otp;
     CadenceGEMState gem;
 
@@ -73,6 +75,7 @@
     SIFIVE_U_PRCI,
     SIFIVE_U_UART0,
     SIFIVE_U_UART1,
+    SIFIVE_U_GPIO,
     SIFIVE_U_OTP,
     SIFIVE_U_FLASH0,
     SIFIVE_U_DRAM,
@@ -83,6 +86,22 @@
 enum {
     SIFIVE_U_UART0_IRQ = 4,
     SIFIVE_U_UART1_IRQ = 5,
+    SIFIVE_U_GPIO_IRQ0 = 7,
+    SIFIVE_U_GPIO_IRQ1 = 8,
+    SIFIVE_U_GPIO_IRQ2 = 9,
+    SIFIVE_U_GPIO_IRQ3 = 10,
+    SIFIVE_U_GPIO_IRQ4 = 11,
+    SIFIVE_U_GPIO_IRQ5 = 12,
+    SIFIVE_U_GPIO_IRQ6 = 13,
+    SIFIVE_U_GPIO_IRQ7 = 14,
+    SIFIVE_U_GPIO_IRQ8 = 15,
+    SIFIVE_U_GPIO_IRQ9 = 16,
+    SIFIVE_U_GPIO_IRQ10 = 17,
+    SIFIVE_U_GPIO_IRQ11 = 18,
+    SIFIVE_U_GPIO_IRQ12 = 19,
+    SIFIVE_U_GPIO_IRQ13 = 20,
+    SIFIVE_U_GPIO_IRQ14 = 21,
+    SIFIVE_U_GPIO_IRQ15 = 22,
     SIFIVE_U_GEM_IRQ = 0x35
 };