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// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: © 2019 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
/* of_diff.c - compare device tree files */
#include <common.h>
#include <fs.h>
#include <libfile.h>
#include <of.h>
#include <command.h>
#include <malloc.h>
#include <complete.h>
#include <errno.h>
#include <linux/err.h>
static struct device_node *get_tree(const char *filename, struct device_node *root)
{
struct device_node *node;
if (!strcmp(filename, "-")) {
node = of_dup(root) ?: ERR_PTR(-ENOENT);
if (IS_ERR(node))
printf("Cannot duplicate live tree: %pe\n", node);
} else if (!strcmp(filename, "+")) {
return NULL;
} else {
node = of_read_file(filename);
}
return node;
}
static struct device_node *get_tree_fixed(const struct device_node *root)
{
struct device_node *node;
node = of_dup(root);
if (!IS_ERR(node))
of_fix_tree(node);
return node;
}
static int do_of_diff(int argc, char *argv[])
{
int ret = COMMAND_ERROR;
struct device_node *a, *b, *root;
if (argc != 3)
return COMMAND_ERROR_USAGE;
root = of_get_root_node();
a = get_tree(argv[1], root);
b = get_tree(argv[2], root);
if (!a && !b)
return COMMAND_ERROR_USAGE;
if (!a)
a = get_tree_fixed(b);
if (!b)
b = get_tree_fixed(a);
if (!IS_ERR(a) && !IS_ERR(b))
ret = of_diff(a, b, 0) ? COMMAND_ERROR : COMMAND_SUCCESS;
if (!IS_ERR(a) && a != root)
of_delete_node(a);
if (!IS_ERR(b) && b != root)
of_delete_node(b);
return ret;
}
BAREBOX_CMD_HELP_START(of_diff)
BAREBOX_CMD_HELP_TEXT("This command prints a diff between two given device trees.")
BAREBOX_CMD_HELP_TEXT("The device trees are given as dtb files or:")
BAREBOX_CMD_HELP_TEXT("'-' to compare against the barebox live tree, or")
BAREBOX_CMD_HELP_TEXT("'+' to compare against the other device tree after fixups")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(of_diff)
.cmd = do_of_diff,
BAREBOX_CMD_DESC("diff device trees")
BAREBOX_CMD_OPTS("<a> <b>")
BAREBOX_CMD_GROUP(CMD_GRP_MISC)
BAREBOX_CMD_HELP(cmd_of_diff_help)
BAREBOX_CMD_END
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