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

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/*
* Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0
*/
/* Tegra high-level function multiplexing */
#ifndef _TEGRA_FUNCMUX_H_
#define _TEGRA_FUNCMUX_H_
/**
* Select a config for a particular peripheral.
*
* Each peripheral can operate through a number of configurations,
* which are sets of pins that it uses to bring out its signals.
* The basic config is 0, and higher numbers indicate different
* pinmux settings to bring the peripheral out on other pins,
*
* This function also disables tristate for the function's pins,
* so that they operate in normal mode.
*
* @param id Peripheral id
* @param config Configuration to use (FUNCMUX_...), 0 for default
* @return 0 if ok, -1 on error (e.g. incorrect id or config)
*/
int funcmux_select(enum periph_id id, int config);
#endif /* _TEGRA_FUNCMUX_H_ */