diff options
Diffstat (limited to 'arch/arm/mach-exynos/setup-keypad.c')
| -rw-r--r-- | arch/arm/mach-exynos/setup-keypad.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/setup-keypad.c b/arch/arm/mach-exynos/setup-keypad.c new file mode 100644 index 000000000000..7862bfb5933d --- /dev/null +++ b/arch/arm/mach-exynos/setup-keypad.c @@ -0,0 +1,36 @@ +/* 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)); +} |