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setup-keypad.c
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1 /* linux/arch/arm/mach-s3c64xx/setup-keypad.c
2  *
3  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4  * http://www.samsung.com/
5  *
6  * GPIO configuration for S3C64XX KeyPad device
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11 */
12 
13 #include <linux/gpio.h>
14 #include <plat/gpio-cfg.h>
15 #include <plat/keypad.h>
16 
17 void samsung_keypad_cfg_gpio(unsigned int rows, unsigned int cols)
18 {
19  /* Set all the necessary GPK pins to special-function 3: KP_ROW[x] */
20  s3c_gpio_cfgrange_nopull(S3C64XX_GPK(8), rows, S3C_GPIO_SFN(3));
21 
22  /* Set all the necessary GPL pins to special-function 3: KP_COL[x] */
23  s3c_gpio_cfgrange_nopull(S3C64XX_GPL(0), cols, S3C_GPIO_SFN(3));
24 }