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/*
* Copyright (C) 2012 Samsung Electronics
* Abhilash Kesavan <a.kesavan@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#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
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