u-boot/arch/arm/include/asm/arch-exynos/pinmux.h
Wolfgang Denk 1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00

50 lines
1.4 KiB
C

/*
* Copyright (C) 2012 Samsung Electronics
* Abhilash Kesavan <a.kesavan@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __ASM_ARM_ARCH_PINMUX_H
#define __ASM_ARM_ARCH_PINMUX_H
#include "periph.h"
/*
* Flags for setting specific configarations of peripherals.
* List will grow with support for more devices getting added.
*/
enum {
PINMUX_FLAG_NONE = 0x00000000,
/* Flags for eMMC */
PINMUX_FLAG_8BIT_MODE = 1 << 0, /* SDMMC 8-bit mode */
/* Flags for SROM controller */
PINMUX_FLAG_BANK = 3 << 0, /* bank number (0-3) */
PINMUX_FLAG_16BIT = 1 << 2, /* 16-bit width */
};
/**
* Configures the pinmux for a particular peripheral.
*
* Each gpio can be configured in many different ways (4 bits on exynos)
* such as "input", "output", "special function", "external interrupt"
* etc. This function will configure the peripheral pinmux along with
* pull-up/down and drive strength.
*
* @param peripheral peripheral to be configured
* @param flags configure flags
* @return 0 if ok, -1 on error (e.g. unsupported peripheral)
*/
int exynos_pinmux_config(int peripheral, int flags);
/**
* Decode the peripheral id using the interrpt numbers.
*
* @param blob Device tree blob
* @param node FDT I2C node to find
* @return peripheral id if ok, PERIPH_ID_NONE on error
*/
int pinmux_decode_periph_id(const void *blob, int node);
#endif