LXR uboot/arch/arm/mach-exynos/include/mach/pinmux.h

   1/*
   2 * Copyright (C) 2012 Samsung Electronics
   3 * Abhilash Kesavan <a.kesavan@samsung.com>
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8#ifndef __ASM_ARM_ARCH_PINMUX_H
   9#define __ASM_ARM_ARCH_PINMUX_H
  10
  11#include "periph.h"
  12
  13/*
  14 * Flags for setting specific configarations of peripherals.
  15 * List will grow with support for more devices getting added.
  16 */
  17enum {
  18        PINMUX_FLAG_NONE        = 0x00000000,
  19
  20        /* Flags for eMMC */
  21        PINMUX_FLAG_8BIT_MODE   = 1 << 0,       /* SDMMC 8-bit mode */
  22
  23        /* Flags for SROM controller */
  24        PINMUX_FLAG_BANK        = 3 << 0,       /* bank number (0-3) */
  25        PINMUX_FLAG_16BIT       = 1 << 2,       /* 16-bit width */
  26
  27        /* Flags for I2C */
  28        PINMUX_FLAG_HS_MODE     = 1 << 1,       /* I2C High Speed Mode */
  29};
  30
  31/**
  32 * Configures the pinmux for a particular peripheral.
  33 *
  34 * Each gpio can be configured in many different ways (4 bits on exynos)
  35 * such as "input", "output", "special function", "external interrupt"
  36 * etc. This function will configure the peripheral pinmux along with
  37 * pull-up/down and drive strength.
  38 *
  39 * @param peripheral    peripheral to be configured
  40 * @param flags         configure flags
  41 * @return 0 if ok, -1 on error (e.g. unsupported peripheral)
  42 */
  43int exynos_pinmux_config(int peripheral, int flags);
  44
  45/**
  46 * Decode the peripheral id using the interrpt numbers.
  47 *
  48 * @param blob  Device tree blob
  49 * @param node  FDT I2C node to find
  50 * @return peripheral id if ok, PERIPH_ID_NONE on error
  51 */
  52int pinmux_decode_periph_id(const void *blob, int node);
  53#endif
  54