3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
4 * Based on code written by:
5 * Pantelis Antoniou <pantelis.antoniou@gmail.com> and
6 * Matthew McClintock <msm@freescale.com>
8 * SPDX-License-Identifier: GPL-2.0+
13 #include <linux/ctype.h>
14 #include <linux/types.h>
15 #include <asm/global_data.h>
17 #include <fdt_support.h>
21 #define MAX_LEVEL 32 /* how deeply nested we will go */
22 #define SCRATCHPAD 1024 /* bytes of scratchpad memory */
23 #ifndef CONFIG_CMD_FDT_MAX_DUMP
24 #define CONFIG_CMD_FDT_MAX_DUMP 64
28 * Global data (for the gd->bd)
30 DECLARE_GLOBAL_DATA_PTR;
32 static int fdt_valid(struct fdt_header **blobp);
33 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
34 static int fdt_print(const char *pathp, char *prop, int depth);
35 static int is_printable_string(const void *data, int len);
38 * The working_fdt points to our working flattened device tree.
40 struct fdt_header *working_fdt;
42 void set_working_fdt_addr(ulong addr)
46 buf = map_sysmem(addr, 0);
48 setenv_hex("fdtaddr", addr);
52 * Get a value from the fdt and format it to be set in the environment
54 static int fdt_value_setenv(const void *nodep, int len, const char *var)
56 if (is_printable_string(nodep, len))
57 setenv(var, (void *)nodep);
61 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
63 } else if (len%4 == 0 && len <= 20) {
64 /* Needed to print things like sha1 hashes. */
68 for (i = 0; i < len; i += sizeof(unsigned int))
69 sprintf(buf + (i * 2), "%08x",
70 *(unsigned int *)(nodep + i));
73 printf("error: unprintable value\n");
80 * Flattened Device Tree command, see the help for parameter definitions.
82 static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
88 * Set the address of the fdt
90 if (strncmp(argv[1], "ad", 2) == 0) {
93 struct fdt_header *blob;
95 * Set the address [and length] of the fdt.
99 /* Temporary #ifdef - some archs don't have fdt_blob yet */
100 #ifdef CONFIG_OF_CONTROL
101 if (argc && !strcmp(*argv, "-c")) {
109 blob = (struct fdt_header *)gd->fdt_blob;
112 if (!blob || !fdt_valid(&blob))
114 printf("The address of the fdt is %#08lx\n",
115 control ? (ulong)map_to_sysmem(blob) :
116 getenv_hex("fdtaddr", 0));
120 addr = simple_strtoul(argv[0], NULL, 16);
121 blob = map_sysmem(addr, 0);
122 if (!fdt_valid(&blob))
127 set_working_fdt_addr(addr);
133 * Optional new length
135 len = simple_strtoul(argv[1], NULL, 16);
136 if (len < fdt_totalsize(blob)) {
137 printf ("New length %d < existing length %d, "
139 len, fdt_totalsize(blob));
142 * Open in place with a new length.
144 err = fdt_open_into(blob, blob, len);
146 printf ("libfdt fdt_open_into(): %s\n",
152 return CMD_RET_SUCCESS;
157 "No FDT memory address configured. Please configure\n"
158 "the FDT address via \"fdt addr <address>\" command.\n"
160 return CMD_RET_FAILURE;
164 * Move the working_fdt
166 if (strncmp(argv[1], "mo", 2) == 0) {
167 struct fdt_header *newaddr;
172 return CMD_RET_USAGE;
175 * Set the address and length of the fdt.
177 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
178 if (!fdt_valid(&working_fdt))
181 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
184 * If the user specifies a length, use that. Otherwise use the
188 len = fdt_totalsize(working_fdt);
190 len = simple_strtoul(argv[4], NULL, 16);
191 if (len < fdt_totalsize(working_fdt)) {
192 printf ("New length 0x%X < existing length "
194 len, fdt_totalsize(working_fdt));
200 * Copy to the new location.
202 err = fdt_open_into(working_fdt, newaddr, len);
204 printf ("libfdt fdt_open_into(): %s\n",
208 working_fdt = newaddr;
209 #ifdef CONFIG_OF_SYSTEM_SETUP
210 /* Call the board-specific fixup routine */
211 } else if (strncmp(argv[1], "sys", 3) == 0) {
212 int err = ft_system_setup(working_fdt, gd->bd);
215 printf("Failed to add system information to FDT: %s\n",
217 return CMD_RET_FAILURE;
223 } else if (strncmp(argv[1], "mk", 2) == 0) {
224 char *pathp; /* path */
225 char *nodep; /* new node to add */
226 int nodeoffset; /* node offset from libfdt */
230 * Parameters: Node path, new node to be appended to the path.
233 return CMD_RET_USAGE;
238 nodeoffset = fdt_path_offset (working_fdt, pathp);
239 if (nodeoffset < 0) {
241 * Not found or something else bad happened.
243 printf ("libfdt fdt_path_offset() returned %s\n",
244 fdt_strerror(nodeoffset));
247 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
249 printf ("libfdt fdt_add_subnode(): %s\n",
255 * Set the value of a property in the working_fdt.
257 } else if (argv[1][0] == 's') {
258 char *pathp; /* path */
259 char *prop; /* property */
260 int nodeoffset; /* node offset from libfdt */
261 static char data[SCRATCHPAD]; /* storage for the property */
262 int len; /* new length of the property */
263 int ret; /* return value */
266 * Parameters: Node path, property, optional value.
269 return CMD_RET_USAGE;
276 ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
281 nodeoffset = fdt_path_offset (working_fdt, pathp);
282 if (nodeoffset < 0) {
284 * Not found or something else bad happened.
286 printf ("libfdt fdt_path_offset() returned %s\n",
287 fdt_strerror(nodeoffset));
291 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
293 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
297 /********************************************************************
298 * Get the value of a property in the working_fdt.
299 ********************************************************************/
300 } else if (argv[1][0] == 'g') {
301 char *subcmd; /* sub-command */
302 char *pathp; /* path */
303 char *prop; /* property */
304 char *var; /* variable to store result */
305 int nodeoffset; /* node offset from libfdt */
306 const void *nodep; /* property node pointer */
307 int len = 0; /* new length of the property */
310 * Parameters: Node path, property, optional value.
313 return CMD_RET_USAGE;
317 if (argc < 6 && subcmd[0] != 's')
318 return CMD_RET_USAGE;
324 nodeoffset = fdt_path_offset(working_fdt, pathp);
325 if (nodeoffset < 0) {
327 * Not found or something else bad happened.
329 printf("libfdt fdt_path_offset() returned %s\n",
330 fdt_strerror(nodeoffset));
334 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
336 int startDepth = fdt_node_depth(
337 working_fdt, nodeoffset);
338 int curDepth = startDepth;
340 int nextNodeOffset = fdt_next_node(
341 working_fdt, nodeoffset, &curDepth);
343 if (subcmd[0] == 'n')
344 reqIndex = simple_strtoul(argv[5], NULL, 16);
346 while (curDepth > startDepth) {
347 if (curDepth == startDepth + 1)
349 if (subcmd[0] == 'n' && curIndex == reqIndex) {
350 const char *nodeName = fdt_get_name(
351 working_fdt, nextNodeOffset, NULL);
353 setenv(var, (char *)nodeName);
356 nextNodeOffset = fdt_next_node(
357 working_fdt, nextNodeOffset, &curDepth);
358 if (nextNodeOffset < 0)
361 if (subcmd[0] == 's') {
362 /* get the num nodes at this level */
363 setenv_ulong(var, curIndex + 1);
365 /* node index not found */
366 printf("libfdt node not found\n");
371 working_fdt, nodeoffset, prop, &len);
373 /* no property value */
376 } else if (len > 0) {
377 if (subcmd[0] == 'v') {
380 ret = fdt_value_setenv(nodep, len, var);
383 } else if (subcmd[0] == 'a') {
387 sprintf(buf, "0x%p", nodep);
389 } else if (subcmd[0] == 's') {
393 sprintf(buf, "0x%08X", len);
396 return CMD_RET_USAGE;
399 printf("libfdt fdt_getprop(): %s\n",
406 * Print (recursive) / List (single level)
408 } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
409 int depth = MAX_LEVEL; /* how deep to print */
410 char *pathp; /* path */
411 char *prop; /* property */
412 int ret; /* return value */
413 static char root[2] = "/";
416 * list is an alias for print, but limited to 1 level
418 if (argv[1][0] == 'l') {
423 * Get the starting path. The root node is an oddball,
424 * the offset is zero and has no name.
435 ret = fdt_print(pathp, prop, depth);
440 * Remove a property/node
442 } else if (strncmp(argv[1], "rm", 2) == 0) {
443 int nodeoffset; /* node offset from libfdt */
447 * Get the path. The root node is an oddball, the offset
448 * is zero and has no name.
450 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
451 if (nodeoffset < 0) {
453 * Not found or something else bad happened.
455 printf ("libfdt fdt_path_offset() returned %s\n",
456 fdt_strerror(nodeoffset));
460 * Do the delete. A fourth parameter means delete a property,
461 * otherwise delete the node.
464 err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
466 printf("libfdt fdt_delprop(): %s\n",
471 err = fdt_del_node(working_fdt, nodeoffset);
473 printf("libfdt fdt_del_node(): %s\n",
480 * Display header info
482 } else if (argv[1][0] == 'h') {
483 u32 version = fdt_version(working_fdt);
484 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
485 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
486 fdt_totalsize(working_fdt));
487 printf("off_dt_struct:\t\t0x%x\n",
488 fdt_off_dt_struct(working_fdt));
489 printf("off_dt_strings:\t\t0x%x\n",
490 fdt_off_dt_strings(working_fdt));
491 printf("off_mem_rsvmap:\t\t0x%x\n",
492 fdt_off_mem_rsvmap(working_fdt));
493 printf("version:\t\t%d\n", version);
494 printf("last_comp_version:\t%d\n",
495 fdt_last_comp_version(working_fdt));
497 printf("boot_cpuid_phys:\t0x%x\n",
498 fdt_boot_cpuid_phys(working_fdt));
500 printf("size_dt_strings:\t0x%x\n",
501 fdt_size_dt_strings(working_fdt));
503 printf("size_dt_struct:\t\t0x%x\n",
504 fdt_size_dt_struct(working_fdt));
505 printf("number mem_rsv:\t\t0x%x\n",
506 fdt_num_mem_rsv(working_fdt));
512 } else if (strncmp(argv[1], "boo", 3) == 0) {
513 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
514 fdt_set_boot_cpuid_phys(working_fdt, tmp);
519 } else if (strncmp(argv[1], "me", 2) == 0) {
522 addr = simple_strtoull(argv[2], NULL, 16);
523 size = simple_strtoull(argv[3], NULL, 16);
524 err = fdt_fixup_memory(working_fdt, addr, size);
529 * mem reserve commands
531 } else if (strncmp(argv[1], "rs", 2) == 0) {
532 if (argv[2][0] == 'p') {
534 int total = fdt_num_mem_rsv(working_fdt);
536 printf("index\t\t start\t\t size\n");
537 printf("-------------------------------"
538 "-----------------\n");
539 for (j = 0; j < total; j++) {
540 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
542 printf("libfdt fdt_get_mem_rsv(): %s\n",
546 printf(" %x\t%08x%08x\t%08x%08x\n", j,
548 (u32)(addr & 0xffffffff),
550 (u32)(size & 0xffffffff));
552 } else if (argv[2][0] == 'a') {
555 addr = simple_strtoull(argv[3], NULL, 16);
556 size = simple_strtoull(argv[4], NULL, 16);
557 err = fdt_add_mem_rsv(working_fdt, addr, size);
560 printf("libfdt fdt_add_mem_rsv(): %s\n",
564 } else if (argv[2][0] == 'd') {
565 unsigned long idx = simple_strtoul(argv[3], NULL, 16);
566 int err = fdt_del_mem_rsv(working_fdt, idx);
569 printf("libfdt fdt_del_mem_rsv(): %s\n",
574 /* Unrecognized command */
575 return CMD_RET_USAGE;
578 #ifdef CONFIG_OF_BOARD_SETUP
579 /* Call the board-specific fixup routine */
580 else if (strncmp(argv[1], "boa", 3) == 0) {
581 int err = ft_board_setup(working_fdt, gd->bd);
584 printf("Failed to update board information in FDT: %s\n",
586 return CMD_RET_FAILURE;
590 /* Create a chosen node */
591 else if (strncmp(argv[1], "cho", 3) == 0) {
592 unsigned long initrd_start = 0, initrd_end = 0;
594 if ((argc != 2) && (argc != 4))
595 return CMD_RET_USAGE;
598 initrd_start = simple_strtoul(argv[2], NULL, 16);
599 initrd_end = simple_strtoul(argv[3], NULL, 16);
602 fdt_chosen(working_fdt);
603 fdt_initrd(working_fdt, initrd_start, initrd_end);
605 #if defined(CONFIG_FIT_SIGNATURE)
606 } else if (strncmp(argv[1], "che", 3) == 0) {
610 struct fdt_header *blob;
613 return CMD_RET_FAILURE;
616 addr = simple_strtoul(argv[2], NULL, 16);
617 blob = map_sysmem(addr, 0);
619 blob = (struct fdt_header *)gd->fdt_blob;
621 if (!fdt_valid(&blob))
625 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
627 printf("Could not find configuration node: %s\n",
628 fdt_strerror(cfg_noffset));
629 return CMD_RET_FAILURE;
632 ret = fit_config_verify(working_fdt, cfg_noffset);
634 return CMD_RET_SUCCESS;
636 return CMD_RET_FAILURE;
640 #ifdef CONFIG_OF_LIBFDT_OVERLAY
641 /* apply an overlay */
642 else if (strncmp(argv[1], "ap", 2) == 0) {
644 struct fdt_header *blob;
648 return CMD_RET_USAGE;
651 return CMD_RET_FAILURE;
653 addr = simple_strtoul(argv[2], NULL, 16);
654 blob = map_sysmem(addr, 0);
655 if (!fdt_valid(&blob))
656 return CMD_RET_FAILURE;
658 ret = fdt_overlay_apply(working_fdt, blob);
660 printf("fdt_overlay_apply(): %s\n", fdt_strerror(ret));
661 return CMD_RET_FAILURE;
666 else if (strncmp(argv[1], "re", 2) == 0) {
669 extrasize = simple_strtoul(argv[2], NULL, 16);
672 fdt_shrink_to_minimum(working_fdt, extrasize);
675 /* Unrecognized command */
676 return CMD_RET_USAGE;
682 /****************************************************************************/
685 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
687 * @blobp: Pointer to FDT pointer
688 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
690 static int fdt_valid(struct fdt_header **blobp)
692 const void *blob = *blobp;
696 printf ("The address of the fdt is invalid (NULL).\n");
700 err = fdt_check_header(blob);
702 return 1; /* valid */
705 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
707 * Be more informative on bad version.
709 if (err == -FDT_ERR_BADVERSION) {
710 if (fdt_version(blob) <
711 FDT_FIRST_SUPPORTED_VERSION) {
712 printf (" - too old, fdt %d < %d",
714 FDT_FIRST_SUPPORTED_VERSION);
716 if (fdt_last_comp_version(blob) >
717 FDT_LAST_SUPPORTED_VERSION) {
718 printf (" - too new, fdt %d > %d",
720 FDT_LAST_SUPPORTED_VERSION);
730 /****************************************************************************/
733 * Parse the user's input, partially heuristic. Valid formats:
734 * <0x00112233 4 05> - an array of cells. Numbers follow standard
736 * [00 11 22 .. nn] - byte stream
737 * "string" - If the the value doesn't start with "<" or "[", it is
738 * treated as a string. Note that the quotes are
739 * stripped by the parser before we get the string.
740 * newval: An array of strings containing the new property as specified
741 * on the command line
742 * count: The number of strings in the array
743 * data: A bytestream to be placed in the property
744 * len: The length of the resulting bytestream
746 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
748 char *cp; /* temporary char pointer */
749 char *newp; /* temporary newval char pointer */
750 unsigned long tmp; /* holds converted values */
756 /* An array of cells */
759 while ((*newp != '>') && (stridx < count)) {
761 * Keep searching until we find that last ">"
762 * That way users don't have to escape the spaces
765 newp = newval[++stridx];
770 tmp = simple_strtoul(cp, &newp, 0);
771 *(fdt32_t *)data = cpu_to_fdt32(tmp);
775 /* If the ptr didn't advance, something went wrong */
776 if ((newp - cp) <= 0) {
777 printf("Sorry, I could not convert \"%s\"\n",
787 printf("Unexpected character '%c'\n", *newp);
790 } else if (*newp == '[') {
792 * Byte stream. Convert the values.
795 while ((stridx < count) && (*newp != ']')) {
799 newp = newval[++stridx];
802 if (!isxdigit(*newp))
804 tmp = simple_strtoul(newp, &newp, 16);
805 *data++ = tmp & 0xFF;
809 printf("Unexpected character '%c'\n", *newp);
814 * Assume it is one or more strings. Copy it into our
815 * data area for convenience (including the
816 * terminating '\0's).
818 while (stridx < count) {
819 size_t length = strlen(newp) + 1;
823 newp = newval[++stridx];
829 /****************************************************************************/
832 * Heuristic to guess if this is a string or concatenated strings.
835 static int is_printable_string(const void *data, int len)
837 const char *s = data;
839 /* zero length is not */
843 /* must terminate with zero or '\n' */
844 if (s[len - 1] != '\0' && s[len - 1] != '\n')
847 /* printable or a null byte (concatenated strings) */
848 while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
850 * If we see a null, there are three possibilities:
851 * 1) If len == 1, it is the end of the string, printable
852 * 2) Next character also a null, not printable.
853 * 3) Next character not a null, continue to check.
865 /* Not the null termination, or not done yet: not printable */
866 if (*s != '\0' || (len != 0))
874 * Print the property in the best format, a heuristic guess. Print as
875 * a string, concatenated strings, a byte, word, double word, or (if all
876 * else fails) it is printed as a stream of bytes.
878 static void print_data(const void *data, int len)
882 /* no data, don't print */
887 * It is a string, but it may have multiple strings (embedded '\0's).
889 if (is_printable_string(data, len)) {
896 j += strlen(data) + 1;
897 data += strlen(data) + 1;
904 if (len > CONFIG_CMD_FDT_MAX_DUMP)
905 printf("* 0x%p [0x%08x]", data, len);
910 for (j = 0, p = data; j < len/4; j++)
911 printf("0x%08x%s", fdt32_to_cpu(p[j]),
912 j < (len/4 - 1) ? " " : "");
915 } else { /* anything else... hexdump */
916 if (len > CONFIG_CMD_FDT_MAX_DUMP)
917 printf("* 0x%p [0x%08x]", data, len);
922 for (j = 0, s = data; j < len; j++)
923 printf("%02x%s", s[j], j < len - 1 ? " " : "");
929 /****************************************************************************/
932 * Recursively print (a portion of) the working_fdt. The depth parameter
933 * determines how deeply nested the fdt is printed.
935 static int fdt_print(const char *pathp, char *prop, int depth)
937 static char tabs[MAX_LEVEL+1] =
938 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
939 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
940 const void *nodep; /* property node pointer */
941 int nodeoffset; /* node offset from libfdt */
942 int nextoffset; /* next node offset from libfdt */
943 uint32_t tag; /* tag */
944 int len; /* length of the property */
945 int level = 0; /* keep track of nesting level */
946 const struct fdt_property *fdt_prop;
948 nodeoffset = fdt_path_offset (working_fdt, pathp);
949 if (nodeoffset < 0) {
951 * Not found or something else bad happened.
953 printf ("libfdt fdt_path_offset() returned %s\n",
954 fdt_strerror(nodeoffset));
958 * The user passed in a property as well as node path.
959 * Print only the given property and then return.
962 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
964 /* no property value */
965 printf("%s %s\n", pathp, prop);
967 } else if (len > 0) {
968 printf("%s = ", prop);
969 print_data (nodep, len);
973 printf ("libfdt fdt_getprop(): %s\n",
980 * The user passed in a node path and no property,
981 * print the node and all subnodes.
984 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
987 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
988 if (level <= depth) {
990 pathp = "/* NULL pointer error */";
992 pathp = "/"; /* root is nameless */
994 &tabs[MAX_LEVEL - level], pathp);
997 if (level >= MAX_LEVEL) {
998 printf("Nested too deep, aborting.\n");
1005 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1007 level = -1; /* exit the loop */
1011 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1013 pathp = fdt_string(working_fdt,
1014 fdt32_to_cpu(fdt_prop->nameoff));
1015 len = fdt32_to_cpu(fdt_prop->len);
1016 nodep = fdt_prop->data;
1018 printf ("libfdt fdt_getprop(): %s\n",
1021 } else if (len == 0) {
1022 /* the property has no value */
1025 &tabs[MAX_LEVEL - level],
1028 if (level <= depth) {
1030 &tabs[MAX_LEVEL - level],
1032 print_data (nodep, len);
1038 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1044 printf("Unknown tag 0x%08X\n", tag);
1047 nodeoffset = nextoffset;
1052 /********************************************************************/
1053 #ifdef CONFIG_SYS_LONGHELP
1054 static char fdt_help_text[] =
1055 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
1056 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1057 "fdt apply <addr> - Apply overlay to the DT\n"
1059 #ifdef CONFIG_OF_BOARD_SETUP
1060 "fdt boardsetup - Do board-specific set up\n"
1062 #ifdef CONFIG_OF_SYSTEM_SETUP
1063 "fdt systemsetup - Do system-specific set up\n"
1065 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1066 "fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1067 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1068 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1069 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
1070 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1071 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1072 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1073 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1074 "fdt mknode <path> <node> - Create a new node after <path>\n"
1075 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1076 "fdt header - Display header info\n"
1077 "fdt bootcpu <id> - Set boot cpuid\n"
1078 "fdt memory <addr> <size> - Add/Update memory node\n"
1079 "fdt rsvmem print - Show current mem reserves\n"
1080 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1081 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1082 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1083 " <start>/<end> - initrd start/end addr\n"
1084 #if defined(CONFIG_FIT_SIGNATURE)
1085 "fdt checksign [<addr>] - check FIT signature\n"
1086 " <start> - addr of key blob\n"
1087 " default gd->fdt_blob\n"
1089 "NOTE: Dereference aliases by omitting the leading '/', "
1090 "e.g. fdt print ethernet0.";
1094 fdt, 255, 0, do_fdt,
1095 "flattened device tree utility commands", fdt_help_text