OMAP: Add gpio-keys support for Overo

This patch adds support for the standard push buttons available on
Overo expansion boards.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/board-overo.c b/arch/arm/mach-omap2/board-overo.c
index e694ebd2636..1e17061649e 100644
--- a/arch/arm/mach-omap2/board-overo.c
+++ b/arch/arm/mach-omap2/board-overo.c
@@ -519,6 +519,47 @@ static void __init overo_init_led(void)
 static inline void __init overo_init_led(void) { return; }
 #endif
 
+#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
+#include <linux/input.h>
+#include <linux/gpio_keys.h>
+
+static struct gpio_keys_button gpio_buttons[] = {
+        {
+                .code                   = BTN_0,
+                .gpio                   = 23,
+                .desc                   = "button0",
+                .wakeup                 = 1,
+        },
+        {
+                .code                   = BTN_1,
+                .gpio                   = 14,
+                .desc                   = "button1",
+                .wakeup                 = 1,
+        },
+};
+
+static struct gpio_keys_platform_data gpio_keys_pdata = {
+        .buttons        = gpio_buttons,
+        .nbuttons       = ARRAY_SIZE(gpio_buttons),
+};
+
+static struct platform_device gpio_keys_device = {
+        .name   = "gpio-keys",
+        .id     = -1,
+        .dev    = {
+                .platform_data  = &gpio_keys_pdata,
+        },
+};
+
+static void __init overo_init_keys(void)
+{
+        platform_device_register(&gpio_keys_device);
+}
+
+#else
+static inline void __init overo_init_keys(void) { return; }
+#endif
+
 static int overo_twl_gpio_setup(struct device *dev,
                 unsigned gpio, unsigned ngpio)
 {
@@ -701,6 +742,7 @@ static void __init overo_init(void)
         overo_init_smsc911x();
         overo_display_init();
         overo_init_led();
+        overo_init_keys();
 
         /* Ensure SDRC pins are mux'd for self-refresh */
         omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);