ARM: S3C2440: Add button support on GTA02

This patch adds support for the two buttons found on the gta02 device,
which are connectd to gpio pins, using the gpio-keys driver.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
index e83062bde416..6629998bafdc 100644
--- a/arch/arm/mach-s3c2440/mach-gta02.c
+++ b/arch/arm/mach-s3c2440/mach-gta02.c
@@ -58,6 +58,9 @@
 #include <linux/mfd/pcf50633/pmic.h>
 #include <linux/mfd/pcf50633/backlight.h>
 
+#include <linux/input.h>
+#include <linux/gpio_keys.h>
+
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
@@ -489,6 +492,36 @@ static struct s3c2410_hcd_info gta02_usb_info __initdata = {
         },
 };
 
+/* Buttons */
+static struct gpio_keys_button gta02_buttons[] = {
+        {
+                .gpio = GTA02_GPIO_AUX_KEY,
+                .code = KEY_PHONE,
+                .desc = "Aux",
+                .type = EV_KEY,
+                .debounce_interval = 100,
+        },
+        {
+                .gpio = GTA02_GPIO_HOLD_KEY,
+                .code = KEY_PAUSE,
+                .desc = "Hold",
+                .type = EV_KEY,
+                .debounce_interval = 100,
+        },
+};
+
+static struct gpio_keys_platform_data gta02_buttons_pdata = {
+        .buttons = gta02_buttons,
+        .nbuttons = ARRAY_SIZE(gta02_buttons),
+};
+
+static struct platform_device gta02_buttons_device = {
+        .name = "gpio-keys",
+        .id = -1,
+        .dev = {
+                .platform_data = &gta02_buttons_pdata,
+        },
+};
 
 static void __init gta02_map_io(void)
 {
@@ -511,6 +544,7 @@ static struct platform_device *gta02_devices[] __initdata = {
         &s3c_device_iis,
         &samsung_asoc_dma,
         &s3c_device_i2c0,
+        &gta02_buttons_device,
 };
 
 /* These guys DO need to be children of PMU. */