release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-s5pv210/setup-keypad.c

   1 /*
   2  * linux/arch/arm/mach-s5pv210/setup-keypad.c
   3  *
   4  * Copyright (C) 2010 Samsung Electronics Co.Ltd
   5  * Author: Joonyoung Shim <jy0922.shim@samsung.com>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  */
  13
  14 #include <linux/gpio.h>
  15 #include <plat/gpio-cfg.h>
  16
  17 void samsung_keypad_cfg_gpio(unsigned int rows, unsigned int cols)
  18 {
  19         unsigned int gpio, end;
  20
  21         /* Set all the necessary GPH3 pins to special-function 3: KP_ROW[x] */
  22         end = S5PV210_GPH3(rows);
  23         for (gpio = S5PV210_GPH3(0); gpio < end; gpio++) {
  24                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
  25                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  26         }
  27
  28         /* Set all the necessary GPH2 pins to special-function 3: KP_COL[x] */
  29         end = S5PV210_GPH2(cols);
  30         for (gpio = S5PV210_GPH2(0); gpio < end; gpio++) {
  31                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
  32                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  33         }
  34 }