release/src-rt-6.x/linux/linux-2.6/include/asm-arm/arch-s3c2410/gpio.h

   1 /*
   2  * linux/include/asm-arm/arch-s3c2410/gpio.h
   3  *
   4  * S3C2410 GPIO wrappers for arch-neutral GPIO calls
   5  *
   6  * Written by Philipp Zabel <philipp.zabel@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  *
  22  */
  23
  24 #ifndef __ASM_ARCH_S3C2410_GPIO_H
  25 #define __ASM_ARCH_S3C2410_GPIO_H
  26
  27 #include <asm/irq.h>
  28 #include <asm/hardware.h>
  29 #include <asm/arch/regs-gpio.h>
  30
  31 static inline int gpio_request(unsigned gpio, const char *label)
  32 {
  33         return 0;
  34 }
  35
  36 static inline void gpio_free(unsigned gpio)
  37 {
  38         return;
  39 }
  40
  41 static inline int gpio_direction_input(unsigned gpio)
  42 {
  43         s3c2410_gpio_cfgpin(gpio, S3C2410_GPIO_INPUT);
  44         return 0;
  45 }
  46
  47 static inline int gpio_direction_output(unsigned gpio, int value)
  48 {
  49         s3c2410_gpio_cfgpin(gpio, S3C2410_GPIO_OUTPUT);
  50         /* REVISIT can we write the value first, to avoid glitching? */
  51         s3c2410_gpio_setpin(gpio, value);
  52         return 0;
  53 }
  54
  55 #define gpio_get_value(gpio)            s3c2410_gpio_getpin(gpio)
  56 #define gpio_set_value(gpio,value)      s3c2410_gpio_setpin(gpio, value)
  57
  58 #include <asm-generic/gpio.h>                   /* cansleep wrappers */
  59
  60 #ifdef CONFIG_CPU_S3C2400
  61 #define gpio_to_irq(gpio)               s3c2400_gpio_getirq(gpio)
  62 #else
  63 #define gpio_to_irq(gpio)               s3c2410_gpio_getirq(gpio)
  64 #endif
  65
  66 /* FIXME implement irq_to_gpio() */
  67
  68 #endif