ARM: mx5: Add gpio-keys to mx51 babbage board

Add functionality for the power button on MX51 Babbage board.

Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

diff --git a/arch/arm/configs/mx51_defconfig b/arch/arm/configs/mx51_defconfig
index 163cfee..5c7a872 100644 (file)
--- a/arch/arm/configs/mx51_defconfig
+++ b/arch/arm/configs/mx51_defconfig
@@ -82,6 +82,7 @@ CONFIG_FEC=y
 CONFIG_INPUT_FF_MEMLESS=m
 # CONFIG_INPUT_MOUSEDEV_PSAUX is not set
 CONFIG_INPUT_EVDEV=y
+CONFIG_KEYBOARD_GPIO=y
 CONFIG_INPUT_EVBUG=m
 CONFIG_MOUSE_PS2=m
 CONFIG_MOUSE_PS2_ELANTECH=y

diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index cbf07ff..1ea54e9 100644 (file)
--- 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);

diff --git a/arch/arm/mach-mx5/devices-imx51.h b/arch/arm/mach-mx5/devices-imx51.h
index 5cc910e..8c50cb5 100644 (file)
--- a/arch/arm/mach-mx5/devices-imx51.h
+++ b/arch/arm/mach-mx5/devices-imx51.h
@@ -13,6 +13,8 @@ extern const struct imx_fec_data imx51_fec_data __initconst;
 #define imx51_add_fec(pdata)   \
        imx_add_fec(&imx51_fec_data, pdata)
 
+#define imx51_add_gpio_keys(pdata) imx_add_gpio_keys(pdata)
+
 extern const struct imx_imx_i2c_data imx51_imx_i2c_data[] __initconst;
 #define imx51_add_imx_i2c(id, pdata)   \
        imx_add_imx_i2c(&imx51_imx_i2c_data[id], pdata)