ENGR00170880 Add gpio key support

Adding gpio keys to support Android buttons. Button
functionality are back, menu, home, vol up, vol down

Signed-off-by: Alejandro Sierra <b18039@freescale.com>

diff --git a/arch/arm/mach-mx6/board-mx6q_sabreauto.c b/arch/arm/mach-mx6/board-mx6q_sabreauto.c
index b7b8a031f61ebcb9097621fe4e8ebfe49f04816e..f5b2f6bca7790a0bc54e235b7e7cebbb6808c19e 100644 (file)
--- a/arch/arm/mach-mx6/board-mx6q_sabreauto.c
+++ b/arch/arm/mach-mx6/board-mx6q_sabreauto.c
@@ -119,6 +119,12 @@
 
 #define MX6Q_SABREAUTO_PMIC_INT                IMX_GPIO_NR(5, 16)
 
+#define ARD_ANDROID_HOME               IMX_GPIO_NR(1, 11)
+#define ARD_ANDROID_BACK                IMX_GPIO_NR(1, 12)
+#define ARD_ANDROID_MENU                IMX_GPIO_NR(2, 12)
+#define ARD_ANDROID_VOLUP               IMX_GPIO_NR(2, 15)
+#define ARD_ANDROID_VOLDOWN             IMX_GPIO_NR(5, 14)
+
 void __init early_console_setup(unsigned long base, struct clk *clk);
 static struct clk *sata_clk;
 static int esai_record;
@@ -170,6 +176,13 @@ static iomux_v3_cfg_t mx6q_sabreauto_pads[] = {
        MX6Q_PAD_GPIO_3__I2C3_SCL,
        MX6Q_PAD_GPIO_3__I2C3_SCL,
 
+       /* Android GPIO keys */
+       MX6Q_PAD_SD2_CMD__GPIO_1_11, /* home */
+       MX6Q_PAD_SD2_DAT3__GPIO_1_12, /* back */
+       MX6Q_PAD_SD4_DAT4__GPIO_2_12, /* prog */
+       MX6Q_PAD_SD4_DAT7__GPIO_2_15, /* vol up */
+       MX6Q_PAD_DISP0_DAT20__GPIO_5_14, /* vol down */
+
        /* SD1 */
        MX6Q_PAD_SD1_CLK__USDHC1_CLK,
        MX6Q_PAD_SD1_CMD__USDHC1_CMD,
@@ -247,7 +260,6 @@ static iomux_v3_cfg_t mx6q_sabreauto_pads[] = {
        MX6Q_PAD_DISP0_DAT17__IPU1_DISP0_DAT_17,
        MX6Q_PAD_DISP0_DAT18__IPU1_DISP0_DAT_18,
        MX6Q_PAD_DISP0_DAT19__IPU1_DISP0_DAT_19,
-       MX6Q_PAD_DISP0_DAT20__IPU1_DISP0_DAT_20,
        MX6Q_PAD_DISP0_DAT21__IPU1_DISP0_DAT_21,
        MX6Q_PAD_DISP0_DAT23__IPU1_DISP0_DAT_23,
        /*PMIC INT*/
@@ -357,6 +369,49 @@ enum sd_pad_mode {
        SD_PAD_MODE_HIGH_SPEED,
 };
 
+#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
+#define GPIO_BUTTON(gpio_num, ev_code, act_low, descr, wake)   \
+{                                                              \
+       .gpio           = gpio_num,                             \
+       .type           = EV_KEY,                               \
+       .code           = ev_code,                              \
+       .active_low     = act_low,                              \
+       .desc           = "btn " descr,                         \
+       .wakeup         = wake,                                 \
+}
+
+static struct gpio_keys_button ard_buttons[] = {
+       GPIO_BUTTON(ARD_ANDROID_HOME, KEY_HOME, 1, "home", 0),
+       GPIO_BUTTON(ARD_ANDROID_BACK, KEY_BACK, 1, "back", 0),
+       GPIO_BUTTON(ARD_ANDROID_MENU, KEY_MENU, 1, "menu", 0),
+       GPIO_BUTTON(ARD_ANDROID_VOLUP, KEY_VOLUMEUP, 1, "volume-up", 0),
+       GPIO_BUTTON(ARD_ANDROID_VOLDOWN, KEY_VOLUMEDOWN, 1, "volume-down", 0),
+};
+
+static struct gpio_keys_platform_data ard_android_button_data = {
+       .buttons        = ard_buttons,
+       .nbuttons       = ARRAY_SIZE(ard_buttons),
+};
+
+static struct platform_device ard_android_button_device = {
+       .name           = "gpio-keys",
+       .id             = -1,
+       .num_resources  = 0,
+       .dev            = {
+       .platform_data = &ard_android_button_data,
+       }
+};
+
+static void __init imx6q_add_android_device_buttons(void)
+{
+       platform_device_register(&ard_android_button_device);
+}
+#else
+static void __init imx6q_add_android_device_buttons(void) {}
+#endif
+
+
+
 static int plt_sd3_pad_change(int clock)
 {
        static enum sd_pad_mode pad_mode = SD_PAD_MODE_LOW_SPEED;
@@ -1337,6 +1392,7 @@ static void __init mx6_board_init(void)
        imx6q_add_ldb(&ldb_data);
        imx6q_add_v4l2_output(0);
        imx6q_add_v4l2_capture(0);
+       imx6q_add_android_device_buttons();
 
        imx6q_add_imx_snvs_rtc();