diff options
Diffstat (limited to 'arch/arm/mach-s3c64xx/setup-keypad.c')
| -rw-r--r-- | arch/arm/mach-s3c64xx/setup-keypad.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c64xx/setup-keypad.c b/arch/arm/mach-s3c64xx/setup-keypad.c new file mode 100644 index 0000000..abc34e4 --- /dev/null +++ b/arch/arm/mach-s3c64xx/setup-keypad.c @@ -0,0 +1,34 @@ +/* linux/arch/arm/mach-s3c64xx/setup-keypad.c + * + * Copyright (c) 2010 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * GPIO configuration for S3C64XX 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) +{ + unsigned int gpio; + unsigned int end; + + /* Set all the necessary GPK pins to special-function 3: KP_ROW[x] */ + end = S3C64XX_GPK(8 + rows); + for (gpio = S3C64XX_GPK(8); gpio < end; gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + + /* Set all the necessary GPL pins to special-function 3: KP_COL[x] */ + end = S3C64XX_GPL(0 + cols); + for (gpio = S3C64XX_GPL(0); gpio < end; gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } +} |