common_fit.c
1.77 KB
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/*
* Copyright (C) 2016 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <errno.h>
#include <image.h>
#include <linux/libfdt.h>
#include <spl.h>
ulong fdt_getprop_u32(const void *fdt, int node, const char *prop)
{
const u32 *cell;
int len;
cell = fdt_getprop(fdt, node, prop, &len);
if (!cell || len != sizeof(*cell))
return FDT_ERROR;
return fdt32_to_cpu(*cell);
}
/*
* Iterate over all /configurations subnodes and call a platform specific
* function to find the matching configuration.
* Returns the node offset or a negative error number.
*/
int fit_find_config_node(const void *fdt)
{
const char *name;
int conf, node, len;
const char *dflt_conf_name;
const char *dflt_conf_desc = NULL;
int dflt_conf_node = -ENOENT;
conf = fdt_path_offset(fdt, FIT_CONFS_PATH);
if (conf < 0) {
debug("%s: Cannot find /configurations node: %d\n", __func__,
conf);
return -EINVAL;
}
dflt_conf_name = fdt_getprop(fdt, conf, "default", &len);
for (node = fdt_first_subnode(fdt, conf);
node >= 0;
node = fdt_next_subnode(fdt, node)) {
name = fdt_getprop(fdt, node, "description", &len);
if (!name) {
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
printf("%s: Missing FDT description in DTB\n",
__func__);
#endif
return -EINVAL;
}
if (dflt_conf_name) {
const char *node_name = fdt_get_name(fdt, node, NULL);
if (strcmp(dflt_conf_name, node_name) == 0) {
dflt_conf_node = node;
dflt_conf_desc = name;
}
}
if (board_fit_config_name_match(name))
continue;
debug("Selecting config '%s'", name);
return node;
}
if (dflt_conf_node != -ENOENT) {
debug("Selecting default config '%s'", dflt_conf_desc);
return dflt_conf_node;
}
return -ENOENT;
}