ARM: shmobile: ape6evm: support GPIO switches

The ape6evm board has switches S16 - S23 wired up to GPIO pins.
This patch allows access to those pins as gpio-keys.

Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/board-ape6evm.c b/arch/arm/mach-shmobile/board-ape6evm.c
index ccf8b0429083..677752cc796a 100644
--- a/arch/arm/mach-shmobile/board-ape6evm.c
+++ b/arch/arm/mach-shmobile/board-ape6evm.c
@@ -19,6 +19,8 @@
  */
 
 #include <linux/gpio.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/mfd/tmio.h>
@@ -37,6 +39,24 @@
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 
+/* GPIO KEY */
+#define GPIO_KEY(c, g, d, ...) \
+        { .code = c, .gpio = g, .desc = d, .active_low = 1 }
+
+static struct gpio_keys_button gpio_buttons[] = {
+        GPIO_KEY(KEY_0,                 324,    "S16"),
+        GPIO_KEY(KEY_MENU,              325,    "S17"),
+        GPIO_KEY(KEY_HOME,              326,    "S18"),
+        GPIO_KEY(KEY_BACK,              327,    "S19"),
+        GPIO_KEY(KEY_VOLUMEUP,          328,    "S20"),
+        GPIO_KEY(KEY_VOLUMEDOWN,        329,    "S21"),
+};
+
+static struct __initdata gpio_keys_platform_data ape6evm_keys_pdata = {
+        .buttons        = gpio_buttons,
+        .nbuttons       = ARRAY_SIZE(gpio_buttons),
+};
+
 /* Dummy supplies, where voltage doesn't matter */
 static struct regulator_consumer_supply dummy_supplies[] = {
         REGULATOR_SUPPLY("vddvario", "smsc911x"),
@@ -172,6 +192,9 @@ static void __init ape6evm_add_standard_devices(void)
         platform_device_register_resndata(&platform_bus, "sh_mobile_sdhi", 1,
                                           sdhi1_resources, ARRAY_SIZE(sdhi1_resources),
                                           &sdhi1_pdata, sizeof(sdhi1_pdata));
+        platform_device_register_data(&platform_bus, "gpio-keys", -1,
+                                      &ape6evm_keys_pdata,
+                                      sizeof(ape6evm_keys_pdata));
 }
 
 static const char *ape6evm_boards_compat_dt[] __initdata = {