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d03c35939d
The keypad controller requires a external pull-up for all the keypad row lines. Fix the incorrect pad configuration for keypad controller row lines by enabling the pad pull-up for the all row lines of the keypad controller. Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
/* linux/arch/arm/mach-exynos4/setup-keypad.c
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* GPIO configuration for Exynos4 KeyPad device
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/gpio.h>
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#include <plat/gpio-cfg.h>
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void samsung_keypad_cfg_gpio(unsigned int rows, unsigned int cols)
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{
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/* Keypads can be of various combinations, Just making sure */
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if (rows > 8) {
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/* Set all the necessary GPX2 pins: KP_ROW[0~7] */
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s3c_gpio_cfgall_range(EXYNOS4_GPX2(0), 8, S3C_GPIO_SFN(3),
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S3C_GPIO_PULL_UP);
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/* Set all the necessary GPX3 pins: KP_ROW[8~] */
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s3c_gpio_cfgall_range(EXYNOS4_GPX3(0), (rows - 8),
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S3C_GPIO_SFN(3), S3C_GPIO_PULL_UP);
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} else {
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/* Set all the necessary GPX2 pins: KP_ROW[x] */
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s3c_gpio_cfgall_range(EXYNOS4_GPX2(0), rows, S3C_GPIO_SFN(3),
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S3C_GPIO_PULL_UP);
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}
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/* Set all the necessary GPX1 pins to special-function 3: KP_COL[x] */
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s3c_gpio_cfgrange_nopull(EXYNOS4_GPX1(0), cols, S3C_GPIO_SFN(3));
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}
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