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 #define CMD_FDT_MAX_DUMP 64
26 * Global data (for the gd->bd)
28 DECLARE_GLOBAL_DATA_PTR;
30 static int fdt_valid(struct fdt_header **blobp);
31 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
32 static int fdt_print(const char *pathp, char *prop, int depth);
33 static int is_printable_string(const void *data, int len);
36 * The working_fdt points to our working flattened device tree.
38 struct fdt_header *working_fdt;
40 void set_working_fdt_addr(ulong addr)
44 buf = map_sysmem(addr, 0);
46 env_set_hex("fdtaddr", addr);
50 * Get a value from the fdt and format it to be set in the environment
52 static int fdt_value_env_set(const void *nodep, int len, const char *var)
54 if (is_printable_string(nodep, len))
55 env_set(var, (void *)nodep);
59 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
61 } else if (len%4 == 0 && len <= 20) {
62 /* Needed to print things like sha1 hashes. */
66 for (i = 0; i < len; i += sizeof(unsigned int))
67 sprintf(buf + (i * 2), "%08x",
68 *(unsigned int *)(nodep + i));
71 printf("error: unprintable value\n");
78 * Flattened Device Tree command, see the help for parameter definitions.
80 static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
86 * Set the address of the fdt
88 if (strncmp(argv[1], "ad", 2) == 0) {
91 struct fdt_header *blob;
93 * Set the address [and length] of the fdt.
97 /* Temporary #ifdef - some archs don't have fdt_blob yet */
98 #ifdef CONFIG_OF_CONTROL
99 if (argc && !strcmp(*argv, "-c")) {
107 blob = (struct fdt_header *)gd->fdt_blob;
110 if (!blob || !fdt_valid(&blob))
112 printf("The address of the fdt is %#08lx\n",
113 control ? (ulong)map_to_sysmem(blob) :
114 env_get_hex("fdtaddr", 0));
118 addr = simple_strtoul(argv[0], NULL, 16);
119 blob = map_sysmem(addr, 0);
120 if (!fdt_valid(&blob))
125 set_working_fdt_addr(addr);
131 * Optional new length
133 len = simple_strtoul(argv[1], NULL, 16);
134 if (len < fdt_totalsize(blob)) {
135 printf ("New length %d < existing length %d, "
137 len, fdt_totalsize(blob));
140 * Open in place with a new length.
142 err = fdt_open_into(blob, blob, len);
144 printf ("libfdt fdt_open_into(): %s\n",
150 return CMD_RET_SUCCESS;
155 "No FDT memory address configured. Please configure\n"
156 "the FDT address via \"fdt addr <address>\" command.\n"
158 return CMD_RET_FAILURE;
162 * Move the working_fdt
164 if (strncmp(argv[1], "mo", 2) == 0) {
165 struct fdt_header *newaddr;
170 return CMD_RET_USAGE;
173 * Set the address and length of the fdt.
175 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
176 if (!fdt_valid(&working_fdt))
179 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
182 * If the user specifies a length, use that. Otherwise use the
186 len = fdt_totalsize(working_fdt);
188 len = simple_strtoul(argv[4], NULL, 16);
189 if (len < fdt_totalsize(working_fdt)) {
190 printf ("New length 0x%X < existing length "
192 len, fdt_totalsize(working_fdt));
198 * Copy to the new location.
200 err = fdt_open_into(working_fdt, newaddr, len);
202 printf ("libfdt fdt_open_into(): %s\n",
206 working_fdt = newaddr;
207 #ifdef CONFIG_OF_SYSTEM_SETUP
208 /* Call the board-specific fixup routine */
209 } else if (strncmp(argv[1], "sys", 3) == 0) {
210 int err = ft_system_setup(working_fdt, gd->bd);
213 printf("Failed to add system information to FDT: %s\n",
215 return CMD_RET_FAILURE;
221 } else if (strncmp(argv[1], "mk", 2) == 0) {
222 char *pathp; /* path */
223 char *nodep; /* new node to add */
224 int nodeoffset; /* node offset from libfdt */
228 * Parameters: Node path, new node to be appended to the path.
231 return CMD_RET_USAGE;
236 nodeoffset = fdt_path_offset (working_fdt, pathp);
237 if (nodeoffset < 0) {
239 * Not found or something else bad happened.
241 printf ("libfdt fdt_path_offset() returned %s\n",
242 fdt_strerror(nodeoffset));
245 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
247 printf ("libfdt fdt_add_subnode(): %s\n",
253 * Set the value of a property in the working_fdt.
255 } else if (argv[1][0] == 's') {
256 char *pathp; /* path */
257 char *prop; /* property */
258 int nodeoffset; /* node offset from libfdt */
259 static char data[SCRATCHPAD] __aligned(4);/* property storage */
261 int len; /* new length of the property */
262 int ret; /* return value */
265 * Parameters: Node path, property, optional value.
268 return CMD_RET_USAGE;
273 nodeoffset = fdt_path_offset (working_fdt, pathp);
274 if (nodeoffset < 0) {
276 * Not found or something else bad happened.
278 printf ("libfdt fdt_path_offset() returned %s\n",
279 fdt_strerror(nodeoffset));
286 ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
287 if (len > SCRATCHPAD) {
288 printf("prop (%d) doesn't fit in scratchpad!\n",
293 memcpy(data, ptmp, len);
295 ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
300 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
302 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
306 /********************************************************************
307 * Get the value of a property in the working_fdt.
308 ********************************************************************/
309 } else if (argv[1][0] == 'g') {
310 char *subcmd; /* sub-command */
311 char *pathp; /* path */
312 char *prop; /* property */
313 char *var; /* variable to store result */
314 int nodeoffset; /* node offset from libfdt */
315 const void *nodep; /* property node pointer */
316 int len = 0; /* new length of the property */
319 * Parameters: Node path, property, optional value.
322 return CMD_RET_USAGE;
326 if (argc < 6 && subcmd[0] != 's')
327 return CMD_RET_USAGE;
333 nodeoffset = fdt_path_offset(working_fdt, pathp);
334 if (nodeoffset < 0) {
336 * Not found or something else bad happened.
338 printf("libfdt fdt_path_offset() returned %s\n",
339 fdt_strerror(nodeoffset));
343 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
345 int startDepth = fdt_node_depth(
346 working_fdt, nodeoffset);
347 int curDepth = startDepth;
349 int nextNodeOffset = fdt_next_node(
350 working_fdt, nodeoffset, &curDepth);
352 if (subcmd[0] == 'n')
353 reqIndex = simple_strtoul(argv[5], NULL, 16);
355 while (curDepth > startDepth) {
356 if (curDepth == startDepth + 1)
358 if (subcmd[0] == 'n' && curIndex == reqIndex) {
359 const char *node_name;
361 node_name = fdt_get_name(working_fdt,
364 env_set(var, node_name);
367 nextNodeOffset = fdt_next_node(
368 working_fdt, nextNodeOffset, &curDepth);
369 if (nextNodeOffset < 0)
372 if (subcmd[0] == 's') {
373 /* get the num nodes at this level */
374 env_set_ulong(var, curIndex + 1);
376 /* node index not found */
377 printf("libfdt node not found\n");
382 working_fdt, nodeoffset, prop, &len);
384 /* no property value */
387 } else if (nodep && len > 0) {
388 if (subcmd[0] == 'v') {
391 ret = fdt_value_env_set(nodep, len,
395 } else if (subcmd[0] == 'a') {
399 sprintf(buf, "0x%p", nodep);
401 } else if (subcmd[0] == 's') {
405 sprintf(buf, "0x%08X", len);
408 return CMD_RET_USAGE;
411 printf("libfdt fdt_getprop(): %s\n",
418 * Print (recursive) / List (single level)
420 } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
421 int depth = MAX_LEVEL; /* how deep to print */
422 char *pathp; /* path */
423 char *prop; /* property */
424 int ret; /* return value */
425 static char root[2] = "/";
428 * list is an alias for print, but limited to 1 level
430 if (argv[1][0] == 'l') {
435 * Get the starting path. The root node is an oddball,
436 * the offset is zero and has no name.
447 ret = fdt_print(pathp, prop, depth);
452 * Remove a property/node
454 } else if (strncmp(argv[1], "rm", 2) == 0) {
455 int nodeoffset; /* node offset from libfdt */
459 * Get the path. The root node is an oddball, the offset
460 * is zero and has no name.
462 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
463 if (nodeoffset < 0) {
465 * Not found or something else bad happened.
467 printf ("libfdt fdt_path_offset() returned %s\n",
468 fdt_strerror(nodeoffset));
472 * Do the delete. A fourth parameter means delete a property,
473 * otherwise delete the node.
476 err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
478 printf("libfdt fdt_delprop(): %s\n",
483 err = fdt_del_node(working_fdt, nodeoffset);
485 printf("libfdt fdt_del_node(): %s\n",
492 * Display header info
494 } else if (argv[1][0] == 'h') {
495 u32 version = fdt_version(working_fdt);
496 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
497 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
498 fdt_totalsize(working_fdt));
499 printf("off_dt_struct:\t\t0x%x\n",
500 fdt_off_dt_struct(working_fdt));
501 printf("off_dt_strings:\t\t0x%x\n",
502 fdt_off_dt_strings(working_fdt));
503 printf("off_mem_rsvmap:\t\t0x%x\n",
504 fdt_off_mem_rsvmap(working_fdt));
505 printf("version:\t\t%d\n", version);
506 printf("last_comp_version:\t%d\n",
507 fdt_last_comp_version(working_fdt));
509 printf("boot_cpuid_phys:\t0x%x\n",
510 fdt_boot_cpuid_phys(working_fdt));
512 printf("size_dt_strings:\t0x%x\n",
513 fdt_size_dt_strings(working_fdt));
515 printf("size_dt_struct:\t\t0x%x\n",
516 fdt_size_dt_struct(working_fdt));
517 printf("number mem_rsv:\t\t0x%x\n",
518 fdt_num_mem_rsv(working_fdt));
524 } else if (strncmp(argv[1], "boo", 3) == 0) {
525 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
526 fdt_set_boot_cpuid_phys(working_fdt, tmp);
531 } else if (strncmp(argv[1], "me", 2) == 0) {
534 addr = simple_strtoull(argv[2], NULL, 16);
535 size = simple_strtoull(argv[3], NULL, 16);
536 err = fdt_fixup_memory(working_fdt, addr, size);
541 * mem reserve commands
543 } else if (strncmp(argv[1], "rs", 2) == 0) {
544 if (argv[2][0] == 'p') {
546 int total = fdt_num_mem_rsv(working_fdt);
548 printf("index\t\t start\t\t size\n");
549 printf("-------------------------------"
550 "-----------------\n");
551 for (j = 0; j < total; j++) {
552 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
554 printf("libfdt fdt_get_mem_rsv(): %s\n",
558 printf(" %x\t%08x%08x\t%08x%08x\n", j,
560 (u32)(addr & 0xffffffff),
562 (u32)(size & 0xffffffff));
564 } else if (argv[2][0] == 'a') {
567 addr = simple_strtoull(argv[3], NULL, 16);
568 size = simple_strtoull(argv[4], NULL, 16);
569 err = fdt_add_mem_rsv(working_fdt, addr, size);
572 printf("libfdt fdt_add_mem_rsv(): %s\n",
576 } else if (argv[2][0] == 'd') {
577 unsigned long idx = simple_strtoul(argv[3], NULL, 16);
578 int err = fdt_del_mem_rsv(working_fdt, idx);
581 printf("libfdt fdt_del_mem_rsv(): %s\n",
586 /* Unrecognized command */
587 return CMD_RET_USAGE;
590 #ifdef CONFIG_OF_BOARD_SETUP
591 /* Call the board-specific fixup routine */
592 else if (strncmp(argv[1], "boa", 3) == 0) {
593 int err = ft_board_setup(working_fdt, gd->bd);
596 printf("Failed to update board information in FDT: %s\n",
598 return CMD_RET_FAILURE;
602 /* Create a chosen node */
603 else if (strncmp(argv[1], "cho", 3) == 0) {
604 unsigned long initrd_start = 0, initrd_end = 0;
606 if ((argc != 2) && (argc != 4))
607 return CMD_RET_USAGE;
610 initrd_start = simple_strtoul(argv[2], NULL, 16);
611 initrd_end = simple_strtoul(argv[3], NULL, 16);
614 fdt_chosen(working_fdt);
615 fdt_initrd(working_fdt, initrd_start, initrd_end);
617 #if defined(CONFIG_FIT_SIGNATURE)
618 } else if (strncmp(argv[1], "che", 3) == 0) {
622 struct fdt_header *blob;
625 return CMD_RET_FAILURE;
628 addr = simple_strtoul(argv[2], NULL, 16);
629 blob = map_sysmem(addr, 0);
631 blob = (struct fdt_header *)gd->fdt_blob;
633 if (!fdt_valid(&blob))
637 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
639 printf("Could not find configuration node: %s\n",
640 fdt_strerror(cfg_noffset));
641 return CMD_RET_FAILURE;
644 ret = fit_config_verify(working_fdt, cfg_noffset);
646 return CMD_RET_SUCCESS;
648 return CMD_RET_FAILURE;
652 #ifdef CONFIG_OF_LIBFDT_OVERLAY
653 /* apply an overlay */
654 else if (strncmp(argv[1], "ap", 2) == 0) {
656 struct fdt_header *blob;
660 return CMD_RET_USAGE;
663 return CMD_RET_FAILURE;
665 addr = simple_strtoul(argv[2], NULL, 16);
666 blob = map_sysmem(addr, 0);
667 if (!fdt_valid(&blob))
668 return CMD_RET_FAILURE;
670 /* apply method prints messages on error */
671 ret = fdt_overlay_apply_verbose(working_fdt, blob);
673 return CMD_RET_FAILURE;
677 else if (strncmp(argv[1], "re", 2) == 0) {
680 extrasize = simple_strtoul(argv[2], NULL, 16);
683 fdt_shrink_to_minimum(working_fdt, extrasize);
686 /* Unrecognized command */
687 return CMD_RET_USAGE;
693 /****************************************************************************/
696 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
698 * @blobp: Pointer to FDT pointer
699 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
701 static int fdt_valid(struct fdt_header **blobp)
703 const void *blob = *blobp;
707 printf ("The address of the fdt is invalid (NULL).\n");
711 err = fdt_check_header(blob);
713 return 1; /* valid */
716 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
718 * Be more informative on bad version.
720 if (err == -FDT_ERR_BADVERSION) {
721 if (fdt_version(blob) <
722 FDT_FIRST_SUPPORTED_VERSION) {
723 printf (" - too old, fdt %d < %d",
725 FDT_FIRST_SUPPORTED_VERSION);
727 if (fdt_last_comp_version(blob) >
728 FDT_LAST_SUPPORTED_VERSION) {
729 printf (" - too new, fdt %d > %d",
731 FDT_LAST_SUPPORTED_VERSION);
741 /****************************************************************************/
744 * Parse the user's input, partially heuristic. Valid formats:
745 * <0x00112233 4 05> - an array of cells. Numbers follow standard
747 * [00 11 22 .. nn] - byte stream
748 * "string" - If the the value doesn't start with "<" or "[", it is
749 * treated as a string. Note that the quotes are
750 * stripped by the parser before we get the string.
751 * newval: An array of strings containing the new property as specified
752 * on the command line
753 * count: The number of strings in the array
754 * data: A bytestream to be placed in the property
755 * len: The length of the resulting bytestream
757 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
759 char *cp; /* temporary char pointer */
760 char *newp; /* temporary newval char pointer */
761 unsigned long tmp; /* holds converted values */
767 /* An array of cells */
770 while ((*newp != '>') && (stridx < count)) {
772 * Keep searching until we find that last ">"
773 * That way users don't have to escape the spaces
776 newp = newval[++stridx];
781 tmp = simple_strtoul(cp, &newp, 0);
783 *(fdt32_t *)data = cpu_to_fdt32(tmp);
790 /* If the ptr didn't advance, something went wrong */
791 if ((newp - cp) <= 0) {
792 printf("Sorry, I could not convert \"%s\"\n",
802 printf("Unexpected character '%c'\n", *newp);
805 } else if (*newp == '[') {
807 * Byte stream. Convert the values.
810 while ((stridx < count) && (*newp != ']')) {
814 newp = newval[++stridx];
817 if (!isxdigit(*newp))
819 tmp = simple_strtoul(newp, &newp, 16);
820 *data++ = tmp & 0xFF;
824 printf("Unexpected character '%c'\n", *newp);
829 * Assume it is one or more strings. Copy it into our
830 * data area for convenience (including the
831 * terminating '\0's).
833 while (stridx < count) {
834 size_t length = strlen(newp) + 1;
838 newp = newval[++stridx];
844 /****************************************************************************/
847 * Heuristic to guess if this is a string or concatenated strings.
850 static int is_printable_string(const void *data, int len)
852 const char *s = data;
854 /* zero length is not */
858 /* must terminate with zero or '\n' */
859 if (s[len - 1] != '\0' && s[len - 1] != '\n')
862 /* printable or a null byte (concatenated strings) */
863 while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
865 * If we see a null, there are three possibilities:
866 * 1) If len == 1, it is the end of the string, printable
867 * 2) Next character also a null, not printable.
868 * 3) Next character not a null, continue to check.
880 /* Not the null termination, or not done yet: not printable */
881 if (*s != '\0' || (len != 0))
889 * Print the property in the best format, a heuristic guess. Print as
890 * a string, concatenated strings, a byte, word, double word, or (if all
891 * else fails) it is printed as a stream of bytes.
893 static void print_data(const void *data, int len)
897 /* no data, don't print */
902 * It is a string, but it may have multiple strings (embedded '\0's).
904 if (is_printable_string(data, len)) {
911 j += strlen(data) + 1;
912 data += strlen(data) + 1;
919 if (len > CMD_FDT_MAX_DUMP)
920 printf("* 0x%p [0x%08x]", data, len);
925 for (j = 0, p = data; j < len/4; j++)
926 printf("0x%08x%s", fdt32_to_cpu(p[j]),
927 j < (len/4 - 1) ? " " : "");
930 } else { /* anything else... hexdump */
931 if (len > CMD_FDT_MAX_DUMP)
932 printf("* 0x%p [0x%08x]", data, len);
937 for (j = 0, s = data; j < len; j++)
938 printf("%02x%s", s[j], j < len - 1 ? " " : "");
944 /****************************************************************************/
947 * Recursively print (a portion of) the working_fdt. The depth parameter
948 * determines how deeply nested the fdt is printed.
950 static int fdt_print(const char *pathp, char *prop, int depth)
952 static char tabs[MAX_LEVEL+1] =
953 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
954 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
955 const void *nodep; /* property node pointer */
956 int nodeoffset; /* node offset from libfdt */
957 int nextoffset; /* next node offset from libfdt */
958 uint32_t tag; /* tag */
959 int len; /* length of the property */
960 int level = 0; /* keep track of nesting level */
961 const struct fdt_property *fdt_prop;
963 nodeoffset = fdt_path_offset (working_fdt, pathp);
964 if (nodeoffset < 0) {
966 * Not found or something else bad happened.
968 printf ("libfdt fdt_path_offset() returned %s\n",
969 fdt_strerror(nodeoffset));
973 * The user passed in a property as well as node path.
974 * Print only the given property and then return.
977 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
979 /* no property value */
980 printf("%s %s\n", pathp, prop);
982 } else if (nodep && len > 0) {
983 printf("%s = ", prop);
984 print_data (nodep, len);
988 printf ("libfdt fdt_getprop(): %s\n",
995 * The user passed in a node path and no property,
996 * print the node and all subnodes.
999 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1001 case FDT_BEGIN_NODE:
1002 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1003 if (level <= depth) {
1005 pathp = "/* NULL pointer error */";
1007 pathp = "/"; /* root is nameless */
1009 &tabs[MAX_LEVEL - level], pathp);
1012 if (level >= MAX_LEVEL) {
1013 printf("Nested too deep, aborting.\n");
1020 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1022 level = -1; /* exit the loop */
1026 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1028 pathp = fdt_string(working_fdt,
1029 fdt32_to_cpu(fdt_prop->nameoff));
1030 len = fdt32_to_cpu(fdt_prop->len);
1031 nodep = fdt_prop->data;
1033 printf ("libfdt fdt_getprop(): %s\n",
1036 } else if (len == 0) {
1037 /* the property has no value */
1040 &tabs[MAX_LEVEL - level],
1043 if (level <= depth) {
1045 &tabs[MAX_LEVEL - level],
1047 print_data (nodep, len);
1053 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1059 printf("Unknown tag 0x%08X\n", tag);
1062 nodeoffset = nextoffset;
1067 /********************************************************************/
1068 #ifdef CONFIG_SYS_LONGHELP
1069 static char fdt_help_text[] =
1070 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
1071 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1072 "fdt apply <addr> - Apply overlay to the DT\n"
1074 #ifdef CONFIG_OF_BOARD_SETUP
1075 "fdt boardsetup - Do board-specific set up\n"
1077 #ifdef CONFIG_OF_SYSTEM_SETUP
1078 "fdt systemsetup - Do system-specific set up\n"
1080 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1081 "fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1082 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1083 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1084 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
1085 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1086 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1087 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1088 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1089 "fdt mknode <path> <node> - Create a new node after <path>\n"
1090 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1091 "fdt header - Display header info\n"
1092 "fdt bootcpu <id> - Set boot cpuid\n"
1093 "fdt memory <addr> <size> - Add/Update memory node\n"
1094 "fdt rsvmem print - Show current mem reserves\n"
1095 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1096 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1097 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1098 " <start>/<end> - initrd start/end addr\n"
1099 #if defined(CONFIG_FIT_SIGNATURE)
1100 "fdt checksign [<addr>] - check FIT signature\n"
1101 " <start> - addr of key blob\n"
1102 " default gd->fdt_blob\n"
1104 "NOTE: Dereference aliases by omitting the leading '/', "
1105 "e.g. fdt print ethernet0.";
1109 fdt, 255, 0, do_fdt,
1110 "flattened device tree utility commands", fdt_help_text