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ARM: EXYNOS4: Add keypad device helpers 

This patch adds the samsung_keypad_cfg_gpio() for EXYNOS4.
Now, this helpers are only for keypad operating in PORT-0.

Signed-off-by: Naveen Krishna Ch <ch.naveen@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Naveen Krishna Ch 2011-03-05 09:44:09 +09:00 committed by Kukjin Kim
parent 40360217fd
commit 8e97fb7945
3 changed files with 41 additions and 0 deletions
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5
arch/arm/mach-exynos4/Kconfig
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@ -65,6 +65,11 @@ config EXYNOS4_SETUP_I2C7
help
Common setup code for i2c bus 7.
config EXYNOS4_SETUP_KEYPAD
bool
help
Common setup code for keypad.
config EXYNOS4_SETUP_SDHCI
bool
select EXYNOS4_SETUP_SDHCI_GPIO

1
arch/arm/mach-exynos4/Makefile
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@ -50,6 +50,7 @@ obj-$(CONFIG_EXYNOS4_SETUP_I2C4) += setup-i2c4.o
obj-$(CONFIG_EXYNOS4_SETUP_I2C5) += setup-i2c5.o
obj-$(CONFIG_EXYNOS4_SETUP_I2C6) += setup-i2c6.o
obj-$(CONFIG_EXYNOS4_SETUP_I2C7) += setup-i2c7.o
obj-$(CONFIG_EXYNOS4_SETUP_KEYPAD) += setup-keypad.o
obj-$(CONFIG_EXYNOS4_SETUP_SDHCI) += setup-sdhci.o
obj-$(CONFIG_EXYNOS4_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o
obj-$(CONFIG_SATA_AHCI_PLATFORM) += dev-ahci.o

35
arch/arm/mach-exynos4/setup-keypad.c Normal file
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@ -0,0 +1,35 @@
/* linux/arch/arm/mach-exynos4/setup-keypad.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* GPIO configuration for Exynos4 KeyPad device
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/gpio.h>
#include <plat/gpio-cfg.h>
void samsung_keypad_cfg_gpio(unsigned int rows, unsigned int cols)
{
/* Keypads can be of various combinations, Just making sure */
if (rows > 8) {
/* Set all the necessary GPX2 pins: KP_ROW[0~7] */
s3c_gpio_cfgrange_nopull(EXYNOS4_GPX2(0), 8, S3C_GPIO_SFN(3));
/* Set all the necessary GPX3 pins: KP_ROW[8~] */
s3c_gpio_cfgrange_nopull(EXYNOS4_GPX3(0), (rows - 8),
S3C_GPIO_SFN(3));
} else {
/* Set all the necessary GPX2 pins: KP_ROW[x] */
s3c_gpio_cfgrange_nopull(EXYNOS4_GPX2(0), rows,
S3C_GPIO_SFN(3));
}
/* Set all the necessary GPX1 pins to special-function 3: KP_COL[x] */
s3c_gpio_cfgrange_nopull(EXYNOS4_GPX1(0), cols, S3C_GPIO_SFN(3));
}