/* 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_cfgrange_nopull(EXYNOS4_GPX2(0), 8, S3C_GPIO_SFN(3)); /* Set all the necessary GPX3 pins: KP_ROW[8~] */ s3c_gpio_cfgrange_nopull(EXYNOS4_GPX3(0), (rows - 8), S3C_GPIO_SFN(3)); } else { /* Set all the necessary GPX2 pins: KP_ROW[x] */ s3c_gpio_cfgrange_nopull(EXYNOS4_GPX2(0), rows, S3C_GPIO_SFN(3)); } /* 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)); }