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