LXR uboot/common/common

   1/*
   2 * Copyright (C) 2016 Google, Inc
   3 * Written by Simon Glass <sjg@chromium.org>
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8#include <common.h>
   9#include <errno.h>
  10#include <image.h>
  11#include <libfdt.h>
  12#include <spl.h>
  13
  14ulong fdt_getprop_u32(const void *fdt, int node, const char *prop)
  15{
  16        const u32 *cell;
  17        int len;
  18
  19        cell = fdt_getprop(fdt, node, prop, &len);
  20        if (!cell || len != sizeof(*cell))
  21                return FDT_ERROR;
  22
  23        return fdt32_to_cpu(*cell);
  24}
  25
  26/*
  27 * Iterate over all /configurations subnodes and call a platform specific
  28 * function to find the matching configuration.
  29 * Returns the node offset or a negative error number.
  30 */
  31int fit_find_config_node(const void *fdt)
  32{
  33        const char *name;
  34        int conf, node, len;
  35
  36        conf = fdt_path_offset(fdt, FIT_CONFS_PATH);
  37        if (conf < 0) {
  38                debug("%s: Cannot find /configurations node: %d\n", __func__,
  39                      conf);
  40                return -EINVAL;
  41        }
  42        for (node = fdt_first_subnode(fdt, conf);
  43             node >= 0;
  44             node = fdt_next_subnode(fdt, node)) {
  45                name = fdt_getprop(fdt, node, "description", &len);
  46                if (!name) {
  47#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
  48                        printf("%s: Missing FDT description in DTB\n",
  49                               __func__);
  50#endif
  51                        return -EINVAL;
  52                }
  53                if (board_fit_config_name_match(name))
  54                        continue;
  55
  56                debug("Selecting config '%s'", name);
  57
  58                return node;
  59        }
  60
  61        return -ENOENT;
  62}
  63