include/asm-arm/arch-omap/gpioexpander.h

   1 /*
   2  * linux/include/asm-arm/arch-omap/gpioexpander.h
   3  *
   4  *
   5  * Copyright (C) 2004 Texas Instruments, Inc.
   6  *
   7  * This package is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  12  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  13  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  14  */
  15
  16 #ifndef __ASM_ARCH_OMAP_GPIOEXPANDER_H
  17 #define __ASM_ARCH_OMAP_GPIOEXPANDER_H
  18
  19 /* Function Prototypes for GPIO Expander functions */
  20
  21 #ifdef CONFIG_GPIOEXPANDER_OMAP
  22 int read_gpio_expa(u8 *, int);
  23 int write_gpio_expa(u8 , int);
  24 #else
  25 static inline int read_gpio_expa(u8 *val, int addr)
  26 {
  27         return 0;
  28 }
  29 static inline int write_gpio_expa(u8 val, int addr)
  30 {
  31         return 0;
  32 }
  33 #endif
  34
  35 #endif /* __ASM_ARCH_OMAP_GPIOEXPANDER_H */