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>

diff --git a/arch/arm/mach-omap2/board-overo.c b/arch/arm/mach-omap2/board-overo.c
index e694ebd2636cc691131a72a6734c3a7d51df24ff..1e17061649e50f1be4b87b03f5d8a16ca8226812 100644 (file)
--- 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);