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author | Naveen Krishna Ch <ch.naveen@samsung.com> | 2011-03-05 09:44:09 +0900 |
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committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-03-15 20:37:02 +0900 |
commit | 8e97fb7945717db1773f723b99ab04f6ed1fa875 (patch) | |
tree | 697770b3f4c62dc444d969ec60aa60e1f99be958 /arch/arm/mach-exynos4/setup-keypad.c | |
parent | 40360217fdbbb9afbbe23639dbc964fb2735a83f (diff) | |
download | kernel_samsung_tuna-8e97fb7945717db1773f723b99ab04f6ed1fa875.zip kernel_samsung_tuna-8e97fb7945717db1773f723b99ab04f6ed1fa875.tar.gz kernel_samsung_tuna-8e97fb7945717db1773f723b99ab04f6ed1fa875.tar.bz2 |
ARM: EXYNOS4: Add keypad device helpers
This patch adds the samsung_keypad_cfg_gpio() for EXYNOS4.
Now, this helpers are only for keypad operating in PORT-0.
Signed-off-by: Naveen Krishna Ch <ch.naveen@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/mach-exynos4/setup-keypad.c')
-rw-r--r-- | arch/arm/mach-exynos4/setup-keypad.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos4/setup-keypad.c b/arch/arm/mach-exynos4/setup-keypad.c new file mode 100644 index 0000000..1ee0ebf --- /dev/null +++ b/arch/arm/mach-exynos4/setup-keypad.c @@ -0,0 +1,35 @@ +/* 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)); +} |