arch/arm/include/asm/arch-tegra/funcmux.h

   1 /*
   2  * Copyright (c) 2010-2012, NVIDIA CORPORATION.  All rights reserved.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 /* Tegra high-level function multiplexing */
   8
   9 #ifndef _TEGRA_FUNCMUX_H_
  10 #define _TEGRA_FUNCMUX_H_
  11
  12 /**
  13  * Select a config for a particular peripheral.
  14  *
  15  * Each peripheral can operate through a number of configurations,
  16  * which are sets of pins that it uses to bring out its signals.
  17  * The basic config is 0, and higher numbers indicate different
  18  * pinmux settings to bring the peripheral out on other pins,
  19  *
  20  * This function also disables tristate for the function's pins,
  21  * so that they operate in normal mode.
  22  *
  23  * @param id            Peripheral id
  24  * @param config        Configuration to use (FUNCMUX_...), 0 for default
  25  * @return 0 if ok, -1 on error (e.g. incorrect id or config)
  26  */
  27 int funcmux_select(enum periph_id id, int config);
  28
  29 #endif  /* _TEGRA_FUNCMUX_H_ */