ARM: 5973/1: ux500: add gpio support

Add support for the GPIOs on the U8500, using the plat-nomadik GPIO
driver.

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

6 files changed, 113 insertions, 3 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index c5408bf1bf43..540f85922113 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -756,6 +756,7 @@ config ARCH_U8500
         select GENERIC_TIME
         select GENERIC_CLOCKEVENTS
         select COMMON_CLKDEV
+        select ARCH_REQUIRE_GPIOLIB
         help
           Support for ST-Ericsson's Ux500 architecture
 
diff --git a/arch/arm/mach-ux500/Kconfig b/arch/arm/mach-ux500/Kconfig
index 03625d744857..cd412a3e0ab8 100644
--- a/arch/arm/mach-ux500/Kconfig
+++ b/arch/arm/mach-ux500/Kconfig
@@ -8,6 +8,7 @@ config MACH_U8500_MOP
         default y
         select ARM_GIC
         select HAS_MTU
+        select NOMADIK_GPIO
         help
           Include support for mop500 development platform
           based on U8500 architecture. The platform is based
diff --git a/arch/arm/mach-ux500/cpu-u8500.c b/arch/arm/mach-ux500/cpu-u8500.c
index 09bcba1ccef1..5fb44661adaf 100644
--- a/arch/arm/mach-ux500/cpu-u8500.c
+++ b/arch/arm/mach-ux500/cpu-u8500.c
@@ -13,6 +13,7 @@
 #include <linux/device.h>
 #include <linux/amba/bus.h>
 #include <linux/irq.h>
+#include <linux/gpio.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
 
@@ -23,9 +24,82 @@
 #include <mach/hardware.h>
 #include <mach/setup.h>
 
-/* add any platform devices here - TODO */
+#define GPIO_RESOURCE(block)                                            \
+        {                                                               \
+                .start  = U8500_GPIOBANK##block##_BASE,                 \
+                .end    = U8500_GPIOBANK##block##_BASE + 127,           \
+                .flags  = IORESOURCE_MEM,                               \
+        },                                                              \
+        {                                                               \
+                .start  = IRQ_GPIO##block,                              \
+                .end    = IRQ_GPIO##block,                              \
+                .flags  = IORESOURCE_IRQ,                               \
+        }
+
+#define GPIO_DEVICE(block)                                              \
+        {                                                               \
+                .name           = "gpio",                               \
+                .id             = block,                                \
+                .num_resources  = 2,                                    \
+                .resource       = &u8500_gpio_resources[block * 2],     \
+                .dev = {                                                \
+                        .platform_data = &u8500_gpio_data[block],       \
+                },                                                      \
+        }
+
+#define GPIO_DATA(_name, first)                                         \
+        {                                                               \
+                .name           = _name,                                \
+                .first_gpio     = first,                                \
+                .first_irq      = NOMADIK_GPIO_TO_IRQ(first),           \
+        }
+
+static struct nmk_gpio_platform_data u8500_gpio_data[] = {
+        GPIO_DATA("GPIO-0-31", 0),
+        GPIO_DATA("GPIO-32-63", 32), /* 37..63 not routed to pin */
+        GPIO_DATA("GPIO-64-95", 64),
+        GPIO_DATA("GPIO-96-127", 96), /* 97..127 not routed to pin */
+        GPIO_DATA("GPIO-128-159", 128),
+        GPIO_DATA("GPIO-160-191", 160), /* 172..191 not routed to pin */
+        GPIO_DATA("GPIO-192-223", 192),
+        GPIO_DATA("GPIO-224-255", 224), /* 231..255 not routed to pin */
+        GPIO_DATA("GPIO-256-288", 256), /* 258..288 not routed to pin */
+};
+
+static struct resource u8500_gpio_resources[] = {
+        GPIO_RESOURCE(0),
+        GPIO_RESOURCE(1),
+        GPIO_RESOURCE(2),
+        GPIO_RESOURCE(3),
+        GPIO_RESOURCE(4),
+        GPIO_RESOURCE(5),
+        GPIO_RESOURCE(6),
+        GPIO_RESOURCE(7),
+        GPIO_RESOURCE(8),
+};
+
+static struct platform_device u8500_gpio_devs[] = {
+        GPIO_DEVICE(0),
+        GPIO_DEVICE(1),
+        GPIO_DEVICE(2),
+        GPIO_DEVICE(3),
+        GPIO_DEVICE(4),
+        GPIO_DEVICE(5),
+        GPIO_DEVICE(6),
+        GPIO_DEVICE(7),
+        GPIO_DEVICE(8),
+};
+
 static struct platform_device *platform_devs[] __initdata = {
-        /* yet to be added, add i2c0, gpio.. */
+        &u8500_gpio_devs[0],
+        &u8500_gpio_devs[1],
+        &u8500_gpio_devs[2],
+        &u8500_gpio_devs[3],
+        &u8500_gpio_devs[4],
+        &u8500_gpio_devs[5],
+        &u8500_gpio_devs[6],
+        &u8500_gpio_devs[7],
+        &u8500_gpio_devs[8],
 };
 
 #define __IO_DEV_DESC(x, sz)    {               \
@@ -49,6 +123,10 @@ static struct map_desc u8500_io_desc[] __initdata = {
         __IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K),
         __IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K),
         __IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K),
+        __IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K),
+        __IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K),
+        __IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K),
+        __IO_DEV_DESC(U8500_GPIO5_BASE, SZ_4K),
 };
 
 static struct map_desc u8500ed_io_desc[] __initdata = {
diff --git a/arch/arm/mach-ux500/include/mach/gpio.h b/arch/arm/mach-ux500/include/mach/gpio.h
new file mode 100644
index 000000000000..3c4cd31ad9f7
--- /dev/null
+++ b/arch/arm/mach-ux500/include/mach/gpio.h
@@ -0,0 +1,12 @@
+#ifndef __ASM_ARCH_GPIO_H
+#define __ASM_ARCH_GPIO_H
+
+/*
+ * 288 (#267 is the highest one actually hooked up) onchip GPIOs, plus enough
+ * room for a couple of GPIO expanders.
+ */
+#define ARCH_NR_GPIOS   350
+
+#include <plat/gpio.h>
+
+#endif /* __ASM_ARCH_GPIO_H */
diff --git a/arch/arm/mach-ux500/include/mach/hardware.h b/arch/arm/mach-ux500/include/mach/hardware.h
index f29a43d9d45a..99ca89fe9b30 100644
--- a/arch/arm/mach-ux500/include/mach/hardware.h
+++ b/arch/arm/mach-ux500/include/mach/hardware.h
@@ -23,6 +23,8 @@
 
 /* typesafe io address */
 #define __io_address(n)         __io(IO_ADDRESS(n))
+/* used by some plat-nomadik code */
+#define io_p2v(n)               __io_address(n)
 
 /*
  * Base address definitions for U8500 Onchip IPs. All the
@@ -128,6 +130,16 @@
 #define U8500_GPIO1_BASE        (U8500_PER1_BASE + 0xe000)
 #define U8500_CLKRST1_BASE      (U8500_PER1_BASE + 0xf000)
 
+#define U8500_GPIOBANK0_BASE    U8500_GPIO1_BASE
+#define U8500_GPIOBANK1_BASE    (U8500_GPIO1_BASE + 0x80)
+#define U8500_GPIOBANK2_BASE    U8500_GPIO3_BASE
+#define U8500_GPIOBANK3_BASE    (U8500_GPIO3_BASE + 0x80)
+#define U8500_GPIOBANK4_BASE    (U8500_GPIO3_BASE + 0x100)
+#define U8500_GPIOBANK5_BASE    (U8500_GPIO3_BASE + 0x180)
+#define U8500_GPIOBANK6_BASE    U8500_GPIO2_BASE
+#define U8500_GPIOBANK7_BASE    (U8500_GPIO2_BASE + 0x80)
+#define U8500_GPIOBANK8_BASE    U8500_GPIO5_BASE
+
 /* ST-Ericsson modified pl022 id */
 #define SSP_PER_ID              0x01080022
 
diff --git a/arch/arm/mach-ux500/include/mach/irqs.h b/arch/arm/mach-ux500/include/mach/irqs.h
index 394b5dd2200f..8a1f6976c245 100644
--- a/arch/arm/mach-ux500/include/mach/irqs.h
+++ b/arch/arm/mach-ux500/include/mach/irqs.h
@@ -66,6 +66,12 @@
 /* There are 128 shared peripheral interrupts assigned to
  * INTID[160:32]. The first 32 interrupts are reserved.
  */
-#define NR_IRQS                 161
+#define U8500_SOC_NR_IRQS               161
+
+/* After chip-specific IRQ numbers we have the GPIO ones */
+#define NOMADIK_NR_GPIO                 288
+#define NOMADIK_GPIO_TO_IRQ(gpio)       ((gpio) + U8500_SOC_NR_IRQS)
+#define NOMADIK_IRQ_TO_GPIO(irq)        ((irq) - U8500_SOC_NR_IRQS)
+#define NR_IRQS                         NOMADIK_GPIO_TO_IRQ(NOMADIK_NR_GPIO)
 
 #endif /*ASM_ARCH_IRQS_H*/