arch/arm/mach-msm/include/mach/msm_gpiomux.h

   1 /* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License version 2 and
   5  * only version 2 as published by the Free Software Foundation.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  */
  12
  13 #ifndef _LINUX_MSM_GPIOMUX_H
  14 #define _LINUX_MSM_GPIOMUX_H
  15
  16 #ifdef CONFIG_MSM_GPIOMUX
  17
  18 /* Increment a gpio's reference count, possibly activating the line. */
  19 int __must_check msm_gpiomux_get(unsigned gpio);
  20
  21 /* Decrement a gpio's reference count, possibly suspending the line. */
  22 int msm_gpiomux_put(unsigned gpio);
  23
  24 #else
  25
  26 static inline int __must_check msm_gpiomux_get(unsigned gpio)
  27 {
  28         return -ENOSYS;
  29 }
  30
  31 static inline int msm_gpiomux_put(unsigned gpio)
  32 {
  33         return -ENOSYS;
  34 }
  35
  36 #endif
  37
  38 #endif /* _LINUX_MSM_GPIOMUX_H */