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author | Sascha Hauer <s.hauer@pengutronix.de> | 2014-05-19 13:58:35 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-05-22 08:09:09 +0200 |
commit | 9cd128d6bea2152ee2152543f688fff3be13db52 (patch) | |
tree | cdd45dbabb7c73874974edb1753896880671dd0f /commands/of_dump.c | |
parent | e275b2653f87dc6969b3c0baf6f0e7460c62a8db (diff) | |
download | barebox-9cd128d6bea2152ee2152543f688fff3be13db52.tar.gz barebox-9cd128d6bea2152ee2152543f688fff3be13db52.tar.xz |
commands: add of_dump command
The oftree command is overloaded. This adds a dedicated command
which only dumps devicetrees to the console so that the corresponding
functionality in the oftree command can be removed in the next step.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'commands/of_dump.c')
-rw-r--r-- | commands/of_dump.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/commands/of_dump.c b/commands/of_dump.c new file mode 100644 index 0000000000..62140a8111 --- /dev/null +++ b/commands/of_dump.c @@ -0,0 +1,108 @@ +/* + * of_dump.c - dump devicetrees to the console + * + * Copyright (c) 2014 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <common.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 int do_of_dump(int argc, char *argv[]) +{ + int opt; + int ret; + struct device_node *root = NULL, *node, *of_free = NULL; + char *dtbfile = NULL; + size_t size; + const char *nodename; + + while ((opt = getopt(argc, argv, "f:")) > 0) { + switch (opt) { + case 'f': + dtbfile = optarg; + 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(NULL, fdt); + + free(fdt); + + if (IS_ERR(root)) { + ret = PTR_ERR(root); + goto out; + } + + of_free = root; + } else { + root = of_get_root_node(); + } + + node = of_find_node_by_path_or_alias(root, nodename); + if (!node) { + printf("Cannot find nodepath %s\n", nodename); + ret = -ENOENT; + goto out; + } + + of_print_nodes(node, 0); + +out: + if (of_free) + of_delete_node(of_free); + + return 0; +} + +BAREBOX_CMD_HELP_START(of_dump) +BAREBOX_CMD_HELP_TEXT("Options:") +BAREBOX_CMD_HELP_OPT ("-f dtb", "work on dtb instead of internal devicetree\n") +BAREBOX_CMD_HELP_END + +BAREBOX_CMD_START(of_dump) + .cmd = do_of_dump, + BAREBOX_CMD_DESC("dump devicetree nodes") + BAREBOX_CMD_OPTS("[-f]") + BAREBOX_CMD_GROUP(CMD_GRP_MISC) + BAREBOX_CMD_COMPLETE(devicetree_file_complete) + BAREBOX_CMD_HELP(cmd_of_dump_help) +BAREBOX_CMD_END |