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// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: © 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
/*
* oftree.c - device tree command support
*
* based on U-Boot code by:
*
* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
* Pantelis Antoniou <pantelis.antoniou@gmail.com> and
* Matthew McClintock <msm@freescale.com>
*/
#include <common.h>
#include <environment.h>
#include <fdt.h>
#include <libfile.h>
#include <of.h>
#include <command.h>
#include <fs.h>
#include <malloc.h>
#include <linux/ctype.h>
#include <linux/err.h>
#include <asm/byteorder.h>
#include <errno.h>
#include <getopt.h>
#include <init.h>
#include <fcntl.h>
#include <complete.h>
static int do_oftree(int argc, char *argv[])
{
struct fdt_header *fdt = NULL;
int opt;
int probe = 0;
char *load = NULL;
char *save = NULL;
int ret;
struct device_node *root;
while ((opt = getopt(argc, argv, "pfl:s:")) > 0) {
switch (opt) {
case 'l':
load = optarg;
break;
case 'p':
if (IS_ENABLED(CONFIG_OFDEVICE)) {
probe = 1;
} else {
printf("oftree device probe support disabled\n");
return COMMAND_ERROR_USAGE;
}
break;
case 's':
save = optarg;
break;
}
}
if (!probe && !load && !save)
return COMMAND_ERROR_USAGE;
if (save) {
fdt = of_get_fixed_tree(NULL);
if (!fdt) {
printf("no devicetree available\n");
ret = -EINVAL;
goto out;
}
ret = write_file(save, fdt, fdt32_to_cpu(fdt->totalsize));
goto out;
}
if (load) {
root = of_read_file(load);
if (IS_ERR(root))
return PTR_ERR(root);
ret = of_set_root_node(root);
if (ret) {
printf("setting root node failed: %s\n", strerror(-ret));
of_delete_node(root);
goto out;
}
}
if (probe) {
ret = of_probe();
if (ret)
goto out;
}
ret = 0;
out:
return ret;
}
BAREBOX_CMD_HELP_START(oftree)
BAREBOX_CMD_HELP_TEXT("Options:")
BAREBOX_CMD_HELP_OPT ("-l <DTB>", "Load <DTB> to internal devicetree")
BAREBOX_CMD_HELP_OPT ("-s <DTB>", "save internal devicetree to <DTB>")
BAREBOX_CMD_HELP_OPT ("-p", "probe devices from stored device tree")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(oftree)
.cmd = do_oftree,
BAREBOX_CMD_DESC("handle device trees")
BAREBOX_CMD_OPTS("[-lsp]")
BAREBOX_CMD_GROUP(CMD_GRP_MISC)
BAREBOX_CMD_HELP(cmd_oftree_help)
BAREBOX_CMD_END
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