release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-s3c2410/include/mach/gpio-track.h

   1 /* arch/arm/mach-s3c24100/include/mach/gpio-core.h
   2  *
   3  * Copyright 2008 Openmoko, Inc.
   4  * Copyright 2008 Simtec Electronics
   5  *      Ben Dooks <ben@simtec.co.uk>
   6  *      http://armlinux.simtec.co.uk/
   7  *
   8  * S3C2410 - GPIO core support
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13 */
  14
  15 #ifndef __ASM_ARCH_GPIO_CORE_H
  16 #define __ASM_ARCH_GPIO_CORE_H __FILE__
  17
  18 #include <mach/regs-gpio.h>
  19
  20 extern struct s3c_gpio_chip s3c24xx_gpios[];
  21
  22 static inline struct s3c_gpio_chip *s3c_gpiolib_getchip(unsigned int pin)
  23 {
  24         struct s3c_gpio_chip *chip;
  25
  26         if (pin > S3C_GPIO_END)
  27                 return NULL;
  28
  29         chip = &s3c24xx_gpios[pin/32];
  30         return ((pin - chip->chip.base) < chip->chip.ngpio) ? chip : NULL;
  31 }
  32
  33 #endif /* __ASM_ARCH_GPIO_CORE_H */