Armadillo500 Add support for onboard GPIO Buttons.

There are two low active Buttons on boards.
This patch connect those to the Input Subsystem over gpio-keys driver.

Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 33 insertions, 0 deletions

diff --git a/arch/arm/mach-mx3/armadillo5x0.c b/arch/arm/mach-mx3/armadillo5x0.c
index 776c0ee1b3cd..309fa7abc099 100644
--- a/arch/arm/mach-mx3/armadillo5x0.c
+++ b/arch/arm/mach-mx3/armadillo5x0.c
@@ -33,6 +33,8 @@
 #include <linux/irq.h>
 #include <linux/mtd/physmap.h>
 #include <linux/io.h>
+#include <linux/input.h>
+#include <linux/gpio_keys.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -98,6 +100,36 @@ static int armadillo5x0_pins[] = {
         MX31_PIN_DRDY0__DRDY0,
         IOMUX_MODE(MX31_PIN_LCS1, IOMUX_CONFIG_GPIO), /*ADV7125_PSAVE*/
 };
+/* GPIO BUTTONS */
+static struct gpio_keys_button armadillo5x0_buttons[] = {
+        {
+                .code           = KEY_ENTER, /*28*/
+                .gpio           = IOMUX_TO_GPIO(MX31_PIN_SCLK0),
+                .active_low     = 1,
+                .desc           = "menu",
+                .wakeup         = 1,
+        }, {
+                .code           = KEY_BACK, /*158*/
+                .gpio           = IOMUX_TO_GPIO(MX31_PIN_SRST0),
+                .active_low     = 1,
+                .desc           = "back",
+                .wakeup         = 1,
+        }
+};
+
+static struct gpio_keys_platform_data armadillo5x0_button_data = {
+        .buttons        = armadillo5x0_buttons,
+        .nbuttons       = ARRAY_SIZE(armadillo5x0_buttons),
+};
+
+static struct platform_device armadillo5x0_button_device = {
+        .name           = "gpio-keys",
+        .id             = -1,
+        .num_resources  = 0,
+        .dev            = {
+                .platform_data  = &armadillo5x0_button_data,
+        }
+};
 
 /*
  * NAND Flash
@@ -300,6 +332,7 @@ static struct imxuart_platform_data uart_pdata = {
 
 static struct platform_device *devices[] __initdata = {
         &armadillo5x0_smc911x_device,
+        &armadillo5x0_button_device,
 };
 
 /*