| /* 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)); |
| } |
