projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 8e97fb79 NKC |
1 | /* linux/arch/arm/mach-exynos4/setup-keypad.c |
| 2 | * | |
| 3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. | |
| 4 | * http://www.samsung.com | |
| 5 | * | |
| 6 | * GPIO configuration for Exynos4 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 | ||
| 16 | void samsung_keypad_cfg_gpio(unsigned int rows, unsigned int cols) | |
| 17 | { | |
| 18 | /* Keypads can be of various combinations, Just making sure */ | |
| 19 | ||
| 20 | if (rows > 8) { | |
| 21 | /* Set all the necessary GPX2 pins: KP_ROW[0~7] */ | |
| d03c3593 TA |
22 | s3c_gpio_cfgall_range(EXYNOS4_GPX2(0), 8, S3C_GPIO_SFN(3), |
| 23 | S3C_GPIO_PULL_UP); | |
| 8e97fb79 NKC |
24 | |
| 25 | /* Set all the necessary GPX3 pins: KP_ROW[8~] */ | |
| d03c3593 TA |
26 | s3c_gpio_cfgall_range(EXYNOS4_GPX3(0), (rows - 8), |
| 27 | S3C_GPIO_SFN(3), S3C_GPIO_PULL_UP); | |
| 8e97fb79 NKC |
28 | } else { |
| 29 | /* Set all the necessary GPX2 pins: KP_ROW[x] */ | |
| d03c3593 TA |
30 | s3c_gpio_cfgall_range(EXYNOS4_GPX2(0), rows, S3C_GPIO_SFN(3), |
| 31 | S3C_GPIO_PULL_UP); | |
| 8e97fb79 NKC |
32 | } |
| 33 | ||
| 34 | /* Set all the necessary GPX1 pins to special-function 3: KP_COL[x] */ | |
| 35 | s3c_gpio_cfgrange_nopull(EXYNOS4_GPX1(0), cols, S3C_GPIO_SFN(3)); | |
| 36 | } |