diff options
| author | Naveen Krishna Ch <ch.naveen@samsung.com> | 2011-03-05 03:44:09 +0300 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-03-15 14:37:02 +0300 |
| commit | 8e97fb7945717db1773f723b99ab04f6ed1fa875 (patch) | |
| tree | 697770b3f4c62dc444d969ec60aa60e1f99be958 | |
| parent | 40360217fdbbb9afbbe23639dbc964fb2735a83f (diff) | |
| download | linux-8e97fb7945717db1773f723b99ab04f6ed1fa875.tar.xz | |
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>
| -rw-r--r-- | arch/arm/mach-exynos4/Kconfig | 5 | ||||
| -rw-r--r-- | arch/arm/mach-exynos4/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/mach-exynos4/setup-keypad.c | 35 |
3 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos4/Kconfig b/arch/arm/mach-exynos4/Kconfig index 8b841e693902..8a007cc26ac5 100644 --- a/arch/arm/mach-exynos4/Kconfig +++ b/arch/arm/mach-exynos4/Kconfig @@ -65,6 +65,11 @@ config EXYNOS4_SETUP_I2C7 help Common setup code for i2c bus 7. +config EXYNOS4_SETUP_KEYPAD + bool + help + Common setup code for keypad. + config EXYNOS4_SETUP_SDHCI bool select EXYNOS4_SETUP_SDHCI_GPIO diff --git a/arch/arm/mach-exynos4/Makefile b/arch/arm/mach-exynos4/Makefile index 486d8b4b38d3..b8f0e7d82d7e 100644 --- a/arch/arm/mach-exynos4/Makefile +++ b/arch/arm/mach-exynos4/Makefile @@ -50,6 +50,7 @@ obj-$(CONFIG_EXYNOS4_SETUP_I2C4) += setup-i2c4.o obj-$(CONFIG_EXYNOS4_SETUP_I2C5) += setup-i2c5.o obj-$(CONFIG_EXYNOS4_SETUP_I2C6) += setup-i2c6.o obj-$(CONFIG_EXYNOS4_SETUP_I2C7) += setup-i2c7.o +obj-$(CONFIG_EXYNOS4_SETUP_KEYPAD) += setup-keypad.o obj-$(CONFIG_EXYNOS4_SETUP_SDHCI) += setup-sdhci.o obj-$(CONFIG_EXYNOS4_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o obj-$(CONFIG_SATA_AHCI_PLATFORM) += dev-ahci.o diff --git a/arch/arm/mach-exynos4/setup-keypad.c b/arch/arm/mach-exynos4/setup-keypad.c new file mode 100644 index 000000000000..1ee0ebff111f --- /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)); +} |