37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
/* 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_cfgall_range(EXYNOS4_GPX2(0), 8, S3C_GPIO_SFN(3),
|
|
S3C_GPIO_PULL_UP);
|
|
|
|
/* Set all the necessary GPX3 pins: KP_ROW[8~] */
|
|
s3c_gpio_cfgall_range(EXYNOS4_GPX3(0), (rows - 8),
|
|
S3C_GPIO_SFN(3), S3C_GPIO_PULL_UP);
|
|
} else {
|
|
/* Set all the necessary GPX2 pins: KP_ROW[x] */
|
|
s3c_gpio_cfgall_range(EXYNOS4_GPX2(0), rows, S3C_GPIO_SFN(3),
|
|
S3C_GPIO_PULL_UP);
|
|
}
|
|
|
|
/* 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));
|
|
}
|