| Naveen Krishna Ch | 8e97fb7 | 2011-03-05 09:44:09 +0900 | [diff] [blame] | 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] */ |
| 22 | s3c_gpio_cfgrange_nopull(EXYNOS4_GPX2(0), 8, S3C_GPIO_SFN(3)); |
| 23 | |
| 24 | /* Set all the necessary GPX3 pins: KP_ROW[8~] */ |
| 25 | s3c_gpio_cfgrange_nopull(EXYNOS4_GPX3(0), (rows - 8), |
| 26 | S3C_GPIO_SFN(3)); |
| 27 | } else { |
| 28 | /* Set all the necessary GPX2 pins: KP_ROW[x] */ |
| 29 | s3c_gpio_cfgrange_nopull(EXYNOS4_GPX2(0), rows, |
| 30 | S3C_GPIO_SFN(3)); |
| 31 | } |
| 32 | |
| 33 | /* Set all the necessary GPX1 pins to special-function 3: KP_COL[x] */ |
| 34 | s3c_gpio_cfgrange_nopull(EXYNOS4_GPX1(0), cols, S3C_GPIO_SFN(3)); |
| 35 | } |
