53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright (C) 2012 Samsung Electronics
|
|
* Abhilash Kesavan <a.kesavan@samsung.com>
|
|
*/
|
|
|
|
#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 */
|
|
|
|
/* Flags for I2C */
|
|
PINMUX_FLAG_HS_MODE = 1 << 1, /* I2C High Speed Mode */
|
|
};
|
|
|
|
/**
|
|
* 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
|