1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
/* linux/arch/arm/mach-exynos/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 defined(CONFIG_MACH_M0_GRANDECTC) || defined(CONFIG_MACH_IRON)
s3c_gpio_cfgpin(EXYNOS4_GPX2(2), S3C_GPIO_SFN(3));
s3c_gpio_setpull(EXYNOS4_GPX2(2), S3C_GPIO_PULL_UP);
s3c_gpio_cfgpin(EXYNOS4_GPX2(4), S3C_GPIO_SFN(3));
s3c_gpio_setpull(EXYNOS4_GPX2(4), S3C_GPIO_PULL_UP);
s3c_gpio_cfgpin(EXYNOS4_GPX3(0), S3C_GPIO_SFN(3));
s3c_gpio_setpull(EXYNOS4_GPX3(0), S3C_GPIO_PULL_UP);
s3c_gpio_cfgall_range(EXYNOS4_GPX3(3), 2, S3C_GPIO_SFN(3), S3C_GPIO_PULL_UP);
s3c_gpio_cfgall_range(EXYNOS4_GPL2(3), 5, S3C_GPIO_SFN(3), S3C_GPIO_PULL_NONE);
#else
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));
#endif
}
|
