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Commit 8e97fb79 authored by Naveen Krishna Ch's avatar Naveen Krishna Ch Committed by Kukjin Kim
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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: default avatarNaveen Krishna Ch <ch.naveen@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent 40360217

arch/arm/mach-exynos4/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -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

arch/arm/mach-exynos4/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/arm/mach-exynos4/setup-keypad.c

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/* 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));

}