31fd4cceb6
Devicetrees tend to become very long and it is hard to find the interesting nodes in a full tree output. This patch adds the -n option to the of_node command. With this option only the names of the nodes are printed, but not the properties. The resulting output is much shorter and the node one is interested in can be copy/pasted to a second call to of_node. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
154 lines
3 KiB
C
154 lines
3 KiB
C
/*
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* of_dump.c - dump devicetrees to the console
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*
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* Copyright (c) 2014 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include <libfile.h>
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#include <fdt.h>
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#include <of.h>
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#include <command.h>
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#include <fs.h>
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#include <malloc.h>
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#include <complete.h>
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#include <linux/ctype.h>
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#include <asm/byteorder.h>
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#include <errno.h>
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#include <getopt.h>
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#include <linux/err.h>
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static void of_print_nodenames(struct device_node *node)
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{
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struct device_node *n;
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printf("%s\n", node->full_name);
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list_for_each_entry(n, &node->children, parent_list)
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of_print_nodenames(n);
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}
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static int do_of_dump(int argc, char *argv[])
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{
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int opt;
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int ret = 0;
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int fix = 0;
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struct device_node *root = NULL, *node, *of_free = NULL;
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char *dtbfile = NULL;
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size_t size;
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const char *nodename;
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int names_only = 0;
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while ((opt = getopt(argc, argv, "Ff:n")) > 0) {
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switch (opt) {
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case 'f':
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dtbfile = optarg;
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break;
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case 'F':
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fix = 1;
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break;
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case 'n':
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names_only = 1;
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break;
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default:
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return COMMAND_ERROR_USAGE;
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}
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}
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if (optind == argc)
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nodename = "/";
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else
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nodename = argv[optind];
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if (dtbfile) {
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void *fdt;
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fdt = read_file(dtbfile, &size);
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if (!fdt) {
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printf("unable to read %s: %s\n", dtbfile, strerror(errno));
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return -errno;
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}
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root = of_unflatten_dtb(fdt);
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free(fdt);
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if (IS_ERR(root)) {
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ret = PTR_ERR(root);
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goto out;
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}
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of_free = root;
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} else {
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root = of_get_root_node();
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if (fix) {
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/* create a copy of internal devicetree */
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void *fdt;
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fdt = of_flatten_dtb(root);
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root = of_unflatten_dtb(fdt);
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free(fdt);
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if (IS_ERR(root)) {
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ret = PTR_ERR(root);
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goto out;
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}
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of_free = root;
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}
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}
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if (fix) {
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ret = of_fix_tree(root);
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if (ret)
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goto out;
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}
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node = of_find_node_by_path_or_alias(root, nodename);
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if (!node) {
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printf("Cannot find nodepath %s\n", nodename);
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ret = -ENOENT;
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goto out;
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}
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if (names_only)
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of_print_nodenames(node);
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else
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of_print_nodes(node, 0);
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out:
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if (of_free)
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of_delete_node(of_free);
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return ret;
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}
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BAREBOX_CMD_HELP_START(of_dump)
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BAREBOX_CMD_HELP_TEXT("Options:")
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BAREBOX_CMD_HELP_OPT ("-f dtb", "work on dtb instead of internal devicetree\n")
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BAREBOX_CMD_HELP_OPT ("-F", "return fixed devicetree\n")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(of_dump)
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.cmd = do_of_dump,
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BAREBOX_CMD_DESC("dump devicetree nodes")
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BAREBOX_CMD_OPTS("[-fF] [NODE]")
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BAREBOX_CMD_GROUP(CMD_GRP_MISC)
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BAREBOX_CMD_COMPLETE(devicetree_file_complete)
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BAREBOX_CMD_HELP(cmd_of_dump_help)
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BAREBOX_CMD_END
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