hikey960: Enable system power off callback

On Hikey960 if outputs GPIO176 low level, it can tell PMIC to power off
the whole board.  To avoid resetting the board and stay off, it also
requires the SW2201's three switches 1/2/3 need to be all set to 0.

Since current code doesn't contain complete GPIO modules and misses to
support GPIO176.  This patch adds all known GPIO modules and initialize
GPIO in BL31, and adds system power off callback to use GPIO176 for PMIC
power off operation.

Change-Id: Ia88859b8b7c87c061420ef75f0de3e2768667bb0
Signed-off-by: Leo Yan <leo.yan@linaro.org>

plat/hisilicon/hikey960/hikey960_bl31_setup.c

@@ -166,6 +166,7 @@ void bl31_platform_setup(void)
 
 	hikey960_edma_init();
 	hikey960_iomcu_dma_init();
+	hikey960_gpio_init();
 
 	hisi_ipc_init();
 }

plat/hisilicon/hikey960/hikey960_bl_common.c

@@ -466,6 +466,13 @@ void hikey960_gpio_init(void)
 	pl061_gpio_register(GPIO19_BASE, 19);
 	pl061_gpio_register(GPIO20_BASE, 20);
 	pl061_gpio_register(GPIO21_BASE, 21);
+	pl061_gpio_register(GPIO22_BASE, 22);
+	pl061_gpio_register(GPIO23_BASE, 23);
+	pl061_gpio_register(GPIO24_BASE, 24);
+	pl061_gpio_register(GPIO25_BASE, 25);
+	pl061_gpio_register(GPIO26_BASE, 26);
+	pl061_gpio_register(GPIO27_BASE, 27);
+	pl061_gpio_register(GPIO28_BASE, 28);
 
 	/* PCIE_PERST_N output low */
 	gpio_set_direction(89, GPIO_DIR_OUT);

plat/hisilicon/hikey960/hikey960_pm.c

@@ -11,6 +11,7 @@
 #include <drivers/arm/cci.h>
 #include <drivers/arm/gicv2.h>
 #include <drivers/arm/pl011.h>
+#include <drivers/arm/pl061_gpio.h>
 #include <drivers/delay_timer.h>
 #include <lib/mmio.h>
 #include <lib/psci/psci.h>
@@ -116,6 +117,13 @@ void hikey960_pwr_domain_off(const psci_power_state_t *target_state)
 	}
 }
 
+static void __dead2 hikey960_system_off(void)
+{
+	gpio_set_direction(176, GPIO_DIR_OUT);
+	gpio_set_value(176, GPIO_LEVEL_LOW);
+	panic();
+}
+
 static void __dead2 hikey960_system_reset(void)
 {
 	dsb();
@@ -293,7 +301,7 @@ static const plat_psci_ops_t hikey960_psci_ops = {
 	.pwr_domain_off			= hikey960_pwr_domain_off,
 	.pwr_domain_suspend		= hikey960_pwr_domain_suspend,
 	.pwr_domain_suspend_finish	= hikey960_pwr_domain_suspend_finish,
-	.system_off			= NULL,
+	.system_off			= hikey960_system_off,
 	.system_reset			= hikey960_system_reset,
 	.validate_power_state		= hikey960_validate_power_state,
 	.validate_ns_entrypoint		= hikey960_validate_ns_entrypoint,

plat/hisilicon/hikey960/include/hi3660.h

@@ -260,6 +260,13 @@
 #define GPIO17_BASE			UL(0xE8A1C000)
 #define GPIO20_BASE			UL(0xE8A1F000)
 #define GPIO21_BASE			UL(0xE8A20000)
+#define GPIO22_BASE			UL(0xFFF0B000)
+#define GPIO23_BASE			UL(0xFFF0C000)
+#define GPIO24_BASE			UL(0xFFF0D000)
+#define GPIO25_BASE			UL(0xFFF0E000)
+#define GPIO26_BASE			UL(0xFFF0F000)
+#define GPIO27_BASE			UL(0xFFF10000)
+#define GPIO28_BASE			UL(0xFFF1D000)
 
 #define TZC_REG_BASE			0xE8A21000
 #define TZC_STAT0_REG			(TZC_REG_BASE + 0x800)

plat/hisilicon/hikey960/platform.mk

@@ -19,7 +19,7 @@ endif
 
 CRASH_CONSOLE_BASE		:=	PL011_UART6_BASE
 COLD_BOOT_SINGLE_CPU		:=	1
-PLAT_PL061_MAX_GPIOS		:=	176
+PLAT_PL061_MAX_GPIOS		:=	232
 PROGRAMMABLE_RESET_ADDRESS	:=	1
 ENABLE_SVE_FOR_NS		:=	0
 PLAT_PARTITION_BLOCK_SIZE	:=	4096
@@ -95,12 +95,15 @@ BL2_SOURCES		+=	lib/optee/optee_utils.c
 endif
 
 BL31_SOURCES		+=	drivers/arm/cci/cci.c			\
+				drivers/arm/pl061/pl061_gpio.c		\
+				drivers/gpio/gpio.c			\
 				lib/cpus/aarch64/cortex_a53.S           \
 				lib/cpus/aarch64/cortex_a72.S		\
 				lib/cpus/aarch64/cortex_a73.S		\
 				plat/common/plat_psci_common.c  \
 				plat/hisilicon/hikey960/aarch64/hikey960_helpers.S \
 				plat/hisilicon/hikey960/hikey960_bl31_setup.c \
+				plat/hisilicon/hikey960/hikey960_bl_common.c \
 				plat/hisilicon/hikey960/hikey960_pm.c	\
 				plat/hisilicon/hikey960/hikey960_topology.c \
 				plat/hisilicon/hikey960/drivers/pwrc/hisi_pwrc.c \