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authorNaveen Krishna Ch <ch.naveen@samsung.com>2011-03-05 09:44:09 +0900
committerKukjin Kim <kgene.kim@samsung.com>2011-03-15 20:37:02 +0900
commit8e97fb7945717db1773f723b99ab04f6ed1fa875 (patch)
tree697770b3f4c62dc444d969ec60aa60e1f99be958 /arch/arm
parent40360217fdbbb9afbbe23639dbc964fb2735a83f (diff)
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')
-rw-r--r--arch/arm/mach-exynos4/Kconfig5
-rw-r--r--arch/arm/mach-exynos4/Makefile1
-rw-r--r--arch/arm/mach-exynos4/setup-keypad.c35
3 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos4/Kconfig b/arch/arm/mach-exynos4/Kconfig
index 8b841e69390..8a007cc26ac 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 486d8b4b38d..b8f0e7d82d7 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 00000000000..1ee0ebff111
--- /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));
+}