LXR uboot/arch/arm/mach-uniphier/mmc-first-dev.c

   1/*
   2 * Copyright (C) 2016 Socionext Inc.
   3 *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8#include <common.h>
   9#include <mmc.h>
  10#include <linux/errno.h>
  11
  12static int find_first_mmc_device(void)
  13{
  14        struct mmc *mmc;
  15        int i;
  16
  17        for (i = 0; (mmc = find_mmc_device(i)); i++) {
  18                if (!mmc_init(mmc) && IS_MMC(mmc))
  19                        return i;
  20        }
  21
  22        return -ENODEV;
  23}
  24
  25int mmc_get_env_dev(void)
  26{
  27        return find_first_mmc_device();
  28}
  29
  30static int do_mmcsetn(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  31{
  32        int dev;
  33
  34        dev = find_first_mmc_device();
  35        if (dev < 0)
  36                return CMD_RET_FAILURE;
  37
  38        env_set_ulong("mmc_first_dev", dev);
  39        return CMD_RET_SUCCESS;
  40}
  41
  42U_BOOT_CMD(
  43           mmcsetn,     1,      1,      do_mmcsetn,
  44        "Set the first MMC (not SD) dev number to \"mmc_first_dev\" environment",
  45        ""
  46);
  47