From 8e97fb7945717db1773f723b99ab04f6ed1fa875 Mon Sep 17 00:00:00 2001 From: Naveen Krishna Ch Date: Sat, 5 Mar 2011 09:44:09 +0900 Subject: 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 Signed-off-by: Kukjin Kim --- arch/arm/mach-exynos4/setup-keypad.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 arch/arm/mach-exynos4/setup-keypad.c (limited to 'arch/arm/mach-exynos4/setup-keypad.c') 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 +#include + +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)); +} -- cgit v1.1