[PATCHv3 1/2] ARM: imx: Add gpio-keys to mx51 babbage board

From: Dinh.Nguyen
Date: Tue Oct 19 2010 - 14:39:22 EST

From: Dinh Nguyen <Dinh.Nguyen@xxxxxxxxxxxxx>

Add functionality for the power button on MX51 Babbage board.

This patch is based on Sascha Hauer's imx/linux-2.6 for-rmk tree.

Signed-off-by: Dinh Nguyen <Dinh.Nguyen@xxxxxxxxxxxxx>
---
arch/arm/configs/mx51_defconfig | 1 +
arch/arm/mach-mx5/board-mx51_babbage.c | 35 +++++++++++++++++++++++++++
arch/arm/plat-mxc/include/mach/iomux-mx51.h | 2 +-
3 files changed, 37 insertions(+), 1 deletions(-)

diff --git a/arch/arm/configs/mx51_defconfig b/arch/arm/configs/mx51_defconfig
index 163cfee..5c7a872 100644
--- 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 23ee4a4..20e9d13 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>
@@ -37,6 +39,7 @@
#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
@@ -46,6 +49,34 @@
#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 struct gpio_keys_platform_data babbage_button_data = {
+ .buttons = babbage_buttons,
+ .nbuttons = ARRAY_SIZE(babbage_buttons),
+};
+
+static struct platform_device babbage_button_device = {
+ .name = "gpio-keys",
+ .id = -1,
+ .num_resources = 0,
+ .dev = {
+ .platform_data = &babbage_button_data,
+ }
+};
+
+static struct platform_device *platform_devices[] __initdata = {
+ &babbage_button_device,
+};
+
static struct pad_desc mx51babbage_pads[] = {
/* UART1 */
MX51_PAD_UART1_RXD__UART1_RXD,
@@ -112,6 +143,9 @@ static struct pad_desc mx51babbage_pads[] = {

/* FEC PHY reset line */
MX51_PAD_EIM_A20__GPIO_2_14,
+
+ /* Power Key */
+ MX51_PAD_EIM_A27__GPIO_2_21,
};

/* Serial ports */
@@ -285,6 +319,7 @@ static void __init mxc_board_init(void)
mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
ARRAY_SIZE(mx51babbage_pads));
mxc_init_imx_uart();
+ platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
babbage_fec_reset();
imx51_add_fec(NULL);

diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx51.h b/arch/arm/plat-mxc/include/mach/iomux-mx51.h
index e46b1c2..2699262 100644
--- a/arch/arm/plat-mxc/include/mach/iomux-mx51.h
+++ b/arch/arm/plat-mxc/include/mach/iomux-mx51.h
@@ -114,7 +114,7 @@ typedef enum iomux_config {
#define MX51_PAD_EIM_A24__GPIO_2_18 IOMUX_PAD(0x450, 0x0bc, 1, 0x0, 0, NO_PAD_CTRL)
#define MX51_PAD_EIM_A25__GPIO_2_19 IOMUX_PAD(0x454, 0x0c0, 1, 0x0, 0, NO_PAD_CTRL)
#define MX51_PAD_EIM_A26__GPIO_2_20 IOMUX_PAD(0x458, 0x0c4, 1, 0x0, 0, NO_PAD_CTRL)
-#define MX51_PAD_EIM_A27__GPIO_2_21 IOMUX_PAD(0x45c, 0x0c8, 1, 0x0, 0, NO_PAD_CTRL)
+#define MX51_PAD_EIM_A27__GPIO_2_21 IOMUX_PAD(0x45c, 0x0c8, 1, 0x0, 0, MX51_I2C_PAD_CTRL)
#define MX51_PAD_EIM_EB0__EIM_EB0 IOMUX_PAD(0x460, 0x0cc, 0, 0x0, 0, NO_PAD_CTRL)
#define MX51_PAD_EIM_EB1__EIM_EB1 IOMUX_PAD(0x464, 0x0d0, 0, 0x0, 0, NO_PAD_CTRL)
#define MX51_PAD_EIM_EB2__GPIO_2_22 IOMUX_PAD(0x468, 0x0d4, 1, 0x0, 0, NO_PAD_CTRL)
--
1.6.0.4


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