[PATCHv4 1/2] ARM: imx: Add gpio-keys to mx51 babbage board

From: Dinh.Nguyen
Date: Thu Oct 21 2010 - 14:53:44 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 | 22 +++++++++++++++++
arch/arm/mach-mx5/devices-imx51.h | 2 +
arch/arm/plat-mxc/devices/Kconfig | 5 ++++
arch/arm/plat-mxc/devices/Makefile | 1 +
arch/arm/plat-mxc/devices/platform-buttons.c | 29 +++++++++++++++++++++++
arch/arm/plat-mxc/include/mach/devices-common.h | 4 +++
arch/arm/plat-mxc/include/mach/iomux-mx51.h | 2 +-
8 files changed, 65 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/plat-mxc/devices/platform-buttons.c

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..f6ce0d6 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 +49,21 @@
#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 struct gpio_keys_platform_data imx_button_data = {
+ .buttons = babbage_buttons,
+ .nbuttons = ARRAY_SIZE(babbage_buttons),
+};
+
static struct pad_desc mx51babbage_pads[] = {
/* UART1 */
MX51_PAD_UART1_RXD__UART1_RXD,
@@ -112,6 +130,9 @@ 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 */
@@ -287,6 +308,7 @@ static void __init mxc_board_init(void)
mxc_init_imx_uart();
babbage_fec_reset();
imx51_add_fec(NULL);
+ imx51_add_buttons(&imx_button_data);

imx51_add_imx_i2c(0, &babbage_i2c_data);
imx51_add_imx_i2c(1, &babbage_i2c_data);
diff --git a/arch/arm/mach-mx5/devices-imx51.h b/arch/arm/mach-mx5/devices-imx51.h
index 5cc910e..a114d65 100644
--- a/arch/arm/mach-mx5/devices-imx51.h
+++ b/arch/arm/mach-mx5/devices-imx51.h
@@ -9,6 +9,8 @@
#include <mach/mx51.h>
#include <mach/devices-common.h>

+#define imx51_add_buttons(pdata) imx_add_buttons(pdata)
+
extern const struct imx_fec_data imx51_fec_data __initconst;
#define imx51_add_fec(pdata) \
imx_add_fec(&imx51_fec_data, pdata)
diff --git a/arch/arm/plat-mxc/devices/Kconfig b/arch/arm/plat-mxc/devices/Kconfig
index 4047994..dbd688b 100644
--- a/arch/arm/plat-mxc/devices/Kconfig
+++ b/arch/arm/plat-mxc/devices/Kconfig
@@ -23,3 +23,8 @@ config IMX_HAVE_PLATFORM_MXC_NAND

config IMX_HAVE_PLATFORM_SPI_IMX
bool
+
+config IMX_HAVE_PLATFORM_GPIO_BUTTONS
+ bool
+ default y if ARCH_MX51
+
diff --git a/arch/arm/plat-mxc/devices/Makefile b/arch/arm/plat-mxc/devices/Makefile
index 0a3c1f0..41008be 100644
--- a/arch/arm/plat-mxc/devices/Makefile
+++ b/arch/arm/plat-mxc/devices/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_SSI) += platform-imx-ssi.o
obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_UART) += platform-imx-uart.o
obj-$(CONFIG_IMX_HAVE_PLATFORM_MXC_NAND) += platform-mxc_nand.o
obj-$(CONFIG_IMX_HAVE_PLATFORM_SPI_IMX) += platform-spi_imx.o
+obj-$(CONFIG_IMX_HAVE_PLATFORM_GPIO_BUTTONS) += platform-buttons.o
\ No newline at end of file
diff --git a/arch/arm/plat-mxc/devices/platform-buttons.c b/arch/arm/plat-mxc/devices/platform-buttons.c
new file mode 100644
index 0000000..23ceed8
--- /dev/null
+++ b/arch/arm/plat-mxc/devices/platform-buttons.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+#include <asm/sizes.h>
+#include <mach/hardware.h>
+#include <mach/devices-common.h>
+
+struct platform_device *__init imx_add_buttons(
+ const struct gpio_keys_platform_data *pdata)
+{
+
+ return imx_add_platform_device("gpio-keys", -1, NULL,
+ NULL, pdata, sizeof(*pdata));
+
+}
diff --git a/arch/arm/plat-mxc/include/mach/devices-common.h b/arch/arm/plat-mxc/include/mach/devices-common.h
index 86d7575..0b37d6d 100644
--- a/arch/arm/plat-mxc/include/mach/devices-common.h
+++ b/arch/arm/plat-mxc/include/mach/devices-common.h
@@ -14,6 +14,10 @@ struct platform_device *imx_add_platform_device(const char *name, int id,
const struct resource *res, unsigned int num_resources,
const void *data, size_t size_data);

+#include <linux/gpio_keys.h>
+struct platform_device *__init imx_add_buttons(
+ const struct gpio_keys_platform_data *pdata);
+
#include <linux/fec.h>
struct imx_fec_data {
resource_size_t iobase;
diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx51.h b/arch/arm/plat-mxc/include/mach/iomux-mx51.h
index e46b1c2..7ae27e8 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_GPIO_PAD_CTRL | PAD_CTL_PUS_100K_UP)
#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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