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// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: © 2014 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
/* of_dump.c - dump devicetrees to the console */
#include <common.h>
#include <libfile.h>
#include <fdt.h>
#include <of.h>
#include <command.h>
#include <fs.h>
#include <malloc.h>
#include <complete.h>
#include <linux/ctype.h>
#include <asm/byteorder.h>
#include <errno.h>
#include <getopt.h>
#include <linux/err.h>
static void of_print_nodenames(struct device_node *node)
{
struct device_node *n;
printf("%s\n", node->full_name);
list_for_each_entry(n, &node->children, parent_list)
of_print_nodenames(n);
}
static int do_of_dump(int argc, char *argv[])
{
int opt;
int ret = 0;
int fix = 0;
struct device_node *root = NULL, *node, *of_free = NULL;
char *dtbfile = NULL;
size_t size;
const char *nodename;
int names_only = 0;
while ((opt = getopt(argc, argv, "Ff:n")) > 0) {
switch (opt) {
case 'f':
dtbfile = optarg;
break;
case 'F':
fix = 1;
break;
case 'n':
names_only = 1;
break;
default:
return COMMAND_ERROR_USAGE;
}
}
if (optind == argc)
nodename = "/";
else
nodename = argv[optind];
if (dtbfile) {
void *fdt;
fdt = read_file(dtbfile, &size);
if (!fdt) {
printf("unable to read %s: %s\n", dtbfile, strerror(errno));
return -errno;
}
root = of_unflatten_dtb(fdt);
free(fdt);
if (IS_ERR(root)) {
ret = PTR_ERR(root);
goto out;
}
of_free = root;
} else {
root = of_get_root_node();
if (fix) {
/* create a copy of internal devicetree */
void *fdt;
fdt = of_flatten_dtb(root);
root = of_unflatten_dtb(fdt);
free(fdt);
if (IS_ERR(root)) {
ret = PTR_ERR(root);
goto out;
}
of_free = root;
}
}
if (fix) {
ret = of_fix_tree(root);
if (ret)
goto out;
}
node = of_find_node_by_path_or_alias(root, nodename);
if (!node) {
printf("Cannot find nodepath %s\n", nodename);
ret = -ENOENT;
goto out;
}
if (names_only)
of_print_nodenames(node);
else
of_print_nodes(node, 0);
out:
if (of_free)
of_delete_node(of_free);
return ret;
}
BAREBOX_CMD_HELP_START(of_dump)
BAREBOX_CMD_HELP_TEXT("Options:")
BAREBOX_CMD_HELP_OPT ("-f dtb", "work on dtb instead of internal devicetree")
BAREBOX_CMD_HELP_OPT ("-F", "return fixed devicetree")
BAREBOX_CMD_HELP_OPT ("-n", "Print node names only, no properties")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(of_dump)
.cmd = do_of_dump,
BAREBOX_CMD_DESC("dump devicetree nodes")
BAREBOX_CMD_OPTS("[-fFn] [NODE]")
BAREBOX_CMD_GROUP(CMD_GRP_MISC)
BAREBOX_CMD_COMPLETE(devicetree_file_complete)
BAREBOX_CMD_HELP(cmd_of_dump_help)
BAREBOX_CMD_END
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