1 files changed, 24 insertions, 0 deletions

diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index cbf07ff34d2b..1ea54e992774 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -18,6 +18,8 @@
 #include <linux/io.h>
 #include <linux/fsl_devices.h>
 #include <linux/fec.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
 
 #include <mach/common.h>
 #include <mach/hardware.h>
@@ -38,6 +40,7 @@
 #define BABBAGE_USBH1_STP       (0*32 + 27)     /* GPIO_1_27 */
 #define BABBAGE_PHY_RESET       (1*32 + 5)      /* GPIO_2_5 */
 #define BABBAGE_FEC_PHY_RESET   (1*32 + 14)     /* GPIO_2_14 */
+#define BABBAGE_POWER_KEY       (1*32 + 21)     /* GPIO_2_21 */
 
 /* USB_CTRL_1 */
 #define MX51_USB_CTRL_1_OFFSET                  0x10
@@ -47,6 +50,21 @@
 #define MX51_USB_PLL_DIV_19_2_MHZ       0x01
 #define MX51_USB_PLL_DIV_24_MHZ 0x02
 
+static struct gpio_keys_button babbage_buttons[] = {
+        {
+                .gpio           = BABBAGE_POWER_KEY,
+                .code           = BTN_0,
+                .desc           = "PWR",
+                .active_low     = 1,
+                .wakeup         = 1,
+        },
+};
+
+static const struct gpio_keys_platform_data imx_button_data __initconst = {
+        .buttons        = babbage_buttons,
+        .nbuttons       = ARRAY_SIZE(babbage_buttons),
+};
+
 static struct pad_desc mx51babbage_pads[] = {
         /* UART1 */
         MX51_PAD_UART1_RXD__UART1_RXD,
@@ -298,6 +316,7 @@ __setup("otg_mode=", babbage_otg_mode);
 static void __init mxc_board_init(void)
 {
         struct pad_desc usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP;
+        struct pad_desc power_key = MX51_PAD_EIM_A27__GPIO_2_21;
 
 #if defined(CONFIG_CPU_FREQ_IMX)
         get_cpu_op = mx51_get_cpu_op;
@@ -308,6 +327,11 @@ static void __init mxc_board_init(void)
         babbage_fec_reset();
         imx51_add_fec(NULL);
 
+        /* Set the PAD settings for the pwr key. */
+        power_key.pad_ctrl = MX51_GPIO_PAD_CTRL_2;
+        mxc_iomux_v3_setup_pad(&power_key);
+        imx51_add_gpio_keys(&imx_button_data);
+
         imx51_add_imx_i2c(0, &babbage_i2c_data);
         imx51_add_imx_i2c(1, &babbage_i2c_data);
         mxc_register_device(&mxc_hsi2c_device, &babbage_hsi2c_data);