1 // SPDX-License-Identifier: GPL-2.0+
4 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Based on code written by:
6 * Pantelis Antoniou <pantelis.antoniou@gmail.com> and
7 * Matthew McClintock <msm@freescale.com>
14 #include <linux/ctype.h>
15 #include <linux/types.h>
16 #include <asm/global_data.h>
17 #include <linux/libfdt.h>
18 #include <fdt_support.h>
22 #define MAX_LEVEL 32 /* how deeply nested we will go */
23 #define SCRATCHPAD 1024 /* bytes of scratchpad memory */
26 * Global data (for the gd->bd)
28 DECLARE_GLOBAL_DATA_PTR;
30 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
31 static int fdt_print(const char *pathp, char *prop, int depth);
32 static int is_printable_string(const void *data, int len);
35 * The working_fdt points to our working flattened device tree.
37 struct fdt_header *working_fdt;
39 void set_working_fdt_addr(ulong addr)
43 buf = map_sysmem(addr, 0);
45 env_set_hex("fdtaddr", addr);
49 * Get a value from the fdt and format it to be set in the environment
51 static int fdt_value_env_set(const void *nodep, int len,
52 const char *var, int index)
54 if (is_printable_string(nodep, len)) {
55 const char *nodec = (const char *)nodep;
59 * Iterate over all members in stringlist and find the one at
60 * offset $index. If no such index exists, indicate failure.
62 for (i = 0; i < len; i += strlen(nodec) + 1) {
66 env_set(var, nodec + i);
71 } else if (len == 4) {
74 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
76 } else if (len%4 == 0 && len <= 20) {
77 /* Needed to print things like sha1 hashes. */
81 for (i = 0; i < len; i += sizeof(unsigned int))
82 sprintf(buf + (i * 2), "%08x",
83 *(unsigned int *)(nodep + i));
86 printf("error: unprintable value\n");
92 static const char * const fdt_member_table[] = {
105 static int fdt_get_header_value(int argc, char *const argv[])
107 fdt32_t *fdtp = (fdt32_t *)working_fdt;
111 if (argv[2][0] != 'g')
112 return CMD_RET_FAILURE;
114 for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
115 if (strcmp(fdt_member_table[i], argv[4]))
118 val = fdt32_to_cpu(fdtp[i]);
119 env_set_hex(argv[3], val);
120 return CMD_RET_SUCCESS;
123 return CMD_RET_FAILURE;
127 * Flattened Device Tree command, see the help for parameter definitions.
129 static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
132 return CMD_RET_USAGE;
134 /* fdt addr: Set the address of the fdt */
135 if (strncmp(argv[1], "ad", 2) == 0) {
139 struct fdt_header *blob;
141 /* Set the address [and length] of the fdt */
144 while (argc > 0 && **argv == '-') {
156 return CMD_RET_USAGE;
164 blob = (struct fdt_header *)gd->fdt_blob;
167 if (!blob || !fdt_valid(&blob))
169 printf("%s fdt: %08lx\n",
170 control ? "Control" : "Working",
171 control ? (ulong)map_to_sysmem(blob) :
172 env_get_hex("fdtaddr", 0));
176 addr = hextoul(argv[0], NULL);
177 blob = map_sysmem(addr, 0);
178 if ((quiet && fdt_check_header(blob)) ||
179 (!quiet && !fdt_valid(&blob)))
184 set_working_fdt_addr(addr);
190 /* Optional new length */
191 len = hextoul(argv[1], NULL);
192 if (len < fdt_totalsize(blob)) {
194 printf("New length %d < existing length %d, ignoring\n",
195 len, fdt_totalsize(blob));
197 /* Open in place with a new length */
198 err = fdt_open_into(blob, blob, len);
199 if (!quiet && err != 0) {
200 printf("libfdt fdt_open_into(): %s\n",
206 return CMD_RET_SUCCESS;
210 puts("No FDT memory address configured. Please configure\n"
211 "the FDT address via \"fdt addr <address>\" command.\n"
213 return CMD_RET_FAILURE;
217 * Move the working_fdt
219 if (strncmp(argv[1], "mo", 2) == 0) {
220 struct fdt_header *newaddr;
225 return CMD_RET_USAGE;
228 * Set the address and length of the fdt.
230 working_fdt = (struct fdt_header *)hextoul(argv[2], NULL);
231 if (!fdt_valid(&working_fdt))
234 newaddr = (struct fdt_header *)hextoul(argv[3], NULL);
237 * If the user specifies a length, use that. Otherwise use the
241 len = fdt_totalsize(working_fdt);
243 len = hextoul(argv[4], NULL);
244 if (len < fdt_totalsize(working_fdt)) {
245 printf ("New length 0x%X < existing length "
247 len, fdt_totalsize(working_fdt));
253 * Copy to the new location.
255 err = fdt_open_into(working_fdt, newaddr, len);
257 printf ("libfdt fdt_open_into(): %s\n",
261 set_working_fdt_addr((ulong)newaddr);
262 #ifdef CONFIG_OF_SYSTEM_SETUP
263 /* Call the board-specific fixup routine */
264 } else if (strncmp(argv[1], "sys", 3) == 0) {
265 int err = ft_system_setup(working_fdt, gd->bd);
268 printf("Failed to add system information to FDT: %s\n",
270 return CMD_RET_FAILURE;
276 } else if (strncmp(argv[1], "mk", 2) == 0) {
277 char *pathp; /* path */
278 char *nodep; /* new node to add */
279 int nodeoffset; /* node offset from libfdt */
283 * Parameters: Node path, new node to be appended to the path.
286 return CMD_RET_USAGE;
291 nodeoffset = fdt_path_offset (working_fdt, pathp);
292 if (nodeoffset < 0) {
294 * Not found or something else bad happened.
296 printf ("libfdt fdt_path_offset() returned %s\n",
297 fdt_strerror(nodeoffset));
300 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
302 printf ("libfdt fdt_add_subnode(): %s\n",
308 * Set the value of a property in the working_fdt.
310 } else if (strncmp(argv[1], "se", 2) == 0) {
311 char *pathp; /* path */
312 char *prop; /* property */
313 int nodeoffset; /* node offset from libfdt */
314 static char data[SCRATCHPAD] __aligned(4);/* property storage */
316 int len; /* new length of the property */
317 int ret; /* return value */
320 * Parameters: Node path, property, optional value.
323 return CMD_RET_USAGE;
328 nodeoffset = fdt_path_offset (working_fdt, pathp);
329 if (nodeoffset < 0) {
331 * Not found or something else bad happened.
333 printf ("libfdt fdt_path_offset() returned %s\n",
334 fdt_strerror(nodeoffset));
341 ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
342 if (len > SCRATCHPAD) {
343 printf("prop (%d) doesn't fit in scratchpad!\n",
348 memcpy(data, ptmp, len);
350 ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
355 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
357 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
361 /********************************************************************
362 * Get the value of a property in the working_fdt.
363 ********************************************************************/
364 } else if (argv[1][0] == 'g') {
365 char *subcmd; /* sub-command */
366 char *pathp; /* path */
367 char *prop; /* property */
368 char *var; /* variable to store result */
369 int nodeoffset; /* node offset from libfdt */
370 const void *nodep; /* property node pointer */
371 int len = 0; /* new length of the property */
374 * Parameters: Node path, property, optional value.
377 return CMD_RET_USAGE;
381 if (argc < 6 && subcmd[0] != 's')
382 return CMD_RET_USAGE;
388 nodeoffset = fdt_path_offset(working_fdt, pathp);
389 if (nodeoffset < 0) {
391 * Not found or something else bad happened.
393 printf("libfdt fdt_path_offset() returned %s\n",
394 fdt_strerror(nodeoffset));
398 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
400 int startDepth = fdt_node_depth(
401 working_fdt, nodeoffset);
402 int curDepth = startDepth;
404 int nextNodeOffset = fdt_next_node(
405 working_fdt, nodeoffset, &curDepth);
407 if (subcmd[0] == 'n')
408 req_index = hextoul(argv[5], NULL);
410 while (curDepth > startDepth) {
411 if (curDepth == startDepth + 1)
413 if (subcmd[0] == 'n' &&
414 cur_index == req_index) {
415 const char *node_name;
417 node_name = fdt_get_name(working_fdt,
420 env_set(var, node_name);
423 nextNodeOffset = fdt_next_node(
424 working_fdt, nextNodeOffset, &curDepth);
425 if (nextNodeOffset < 0)
428 if (subcmd[0] == 's') {
429 /* get the num nodes at this level */
430 env_set_ulong(var, cur_index + 1);
432 /* node index not found */
433 printf("libfdt node not found\n");
438 working_fdt, nodeoffset, prop, &len);
440 /* no property value */
443 } else if (nodep && len > 0) {
444 if (subcmd[0] == 'v') {
449 index = simple_strtoul(argv[6], NULL, 10);
451 ret = fdt_value_env_set(nodep, len,
455 } else if (subcmd[0] == 'a') {
459 sprintf(buf, "0x%p", nodep);
461 } else if (subcmd[0] == 's') {
465 sprintf(buf, "0x%08X", len);
468 return CMD_RET_USAGE;
471 printf("libfdt fdt_getprop(): %s\n",
478 * Print (recursive) / List (single level)
480 } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
481 int depth = MAX_LEVEL; /* how deep to print */
482 char *pathp; /* path */
483 char *prop; /* property */
484 int ret; /* return value */
485 static char root[2] = "/";
488 * list is an alias for print, but limited to 1 level
490 if (argv[1][0] == 'l') {
495 * Get the starting path. The root node is an oddball,
496 * the offset is zero and has no name.
507 ret = fdt_print(pathp, prop, depth);
512 * Remove a property/node
514 } else if (strncmp(argv[1], "rm", 2) == 0) {
515 int nodeoffset; /* node offset from libfdt */
519 * Get the path. The root node is an oddball, the offset
520 * is zero and has no name.
522 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
523 if (nodeoffset < 0) {
525 * Not found or something else bad happened.
527 printf ("libfdt fdt_path_offset() returned %s\n",
528 fdt_strerror(nodeoffset));
532 * Do the delete. A fourth parameter means delete a property,
533 * otherwise delete the node.
536 err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
538 printf("libfdt fdt_delprop(): %s\n",
543 err = fdt_del_node(working_fdt, nodeoffset);
545 printf("libfdt fdt_del_node(): %s\n",
552 * Display header info
554 } else if (argv[1][0] == 'h') {
556 return fdt_get_header_value(argc, argv);
558 u32 version = fdt_version(working_fdt);
559 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
560 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
561 fdt_totalsize(working_fdt));
562 printf("off_dt_struct:\t\t0x%x\n",
563 fdt_off_dt_struct(working_fdt));
564 printf("off_dt_strings:\t\t0x%x\n",
565 fdt_off_dt_strings(working_fdt));
566 printf("off_mem_rsvmap:\t\t0x%x\n",
567 fdt_off_mem_rsvmap(working_fdt));
568 printf("version:\t\t%d\n", version);
569 printf("last_comp_version:\t%d\n",
570 fdt_last_comp_version(working_fdt));
572 printf("boot_cpuid_phys:\t0x%x\n",
573 fdt_boot_cpuid_phys(working_fdt));
575 printf("size_dt_strings:\t0x%x\n",
576 fdt_size_dt_strings(working_fdt));
578 printf("size_dt_struct:\t\t0x%x\n",
579 fdt_size_dt_struct(working_fdt));
580 printf("number mem_rsv:\t\t0x%x\n",
581 fdt_num_mem_rsv(working_fdt));
587 } else if (strncmp(argv[1], "boo", 3) == 0) {
588 unsigned long tmp = hextoul(argv[2], NULL);
589 fdt_set_boot_cpuid_phys(working_fdt, tmp);
594 } else if (strncmp(argv[1], "me", 2) == 0) {
597 addr = simple_strtoull(argv[2], NULL, 16);
598 size = simple_strtoull(argv[3], NULL, 16);
599 err = fdt_fixup_memory(working_fdt, addr, size);
604 * mem reserve commands
606 } else if (strncmp(argv[1], "rs", 2) == 0) {
607 if (argv[2][0] == 'p') {
609 int total = fdt_num_mem_rsv(working_fdt);
611 printf("index\t\t start\t\t size\n");
612 printf("-------------------------------"
613 "-----------------\n");
614 for (j = 0; j < total; j++) {
615 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
617 printf("libfdt fdt_get_mem_rsv(): %s\n",
621 printf(" %x\t%08x%08x\t%08x%08x\n", j,
623 (u32)(addr & 0xffffffff),
625 (u32)(size & 0xffffffff));
627 } else if (argv[2][0] == 'a') {
630 addr = simple_strtoull(argv[3], NULL, 16);
631 size = simple_strtoull(argv[4], NULL, 16);
632 err = fdt_add_mem_rsv(working_fdt, addr, size);
635 printf("libfdt fdt_add_mem_rsv(): %s\n",
639 } else if (argv[2][0] == 'd') {
640 unsigned long idx = hextoul(argv[3], NULL);
641 int err = fdt_del_mem_rsv(working_fdt, idx);
644 printf("libfdt fdt_del_mem_rsv(): %s\n",
649 /* Unrecognized command */
650 return CMD_RET_USAGE;
653 #ifdef CONFIG_OF_BOARD_SETUP
654 /* Call the board-specific fixup routine */
655 else if (strncmp(argv[1], "boa", 3) == 0) {
656 int err = ft_board_setup(working_fdt, gd->bd);
659 printf("Failed to update board information in FDT: %s\n",
661 return CMD_RET_FAILURE;
663 #ifdef CONFIG_ARCH_KEYSTONE
664 ft_board_setup_ex(working_fdt, gd->bd);
668 /* Create a chosen node */
669 else if (strncmp(argv[1], "cho", 3) == 0) {
670 unsigned long initrd_start = 0, initrd_end = 0;
672 if ((argc != 2) && (argc != 4))
673 return CMD_RET_USAGE;
676 initrd_start = hextoul(argv[2], NULL);
677 initrd_end = initrd_start + hextoul(argv[3], NULL) - 1;
680 fdt_chosen(working_fdt);
681 fdt_initrd(working_fdt, initrd_start, initrd_end);
683 #if defined(CONFIG_FIT_SIGNATURE)
684 } else if (strncmp(argv[1], "che", 3) == 0) {
688 struct fdt_header *blob;
691 return CMD_RET_FAILURE;
694 addr = hextoul(argv[2], NULL);
695 blob = map_sysmem(addr, 0);
697 blob = (struct fdt_header *)gd->fdt_blob;
699 if (!fdt_valid(&blob))
703 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
705 printf("Could not find configuration node: %s\n",
706 fdt_strerror(cfg_noffset));
707 return CMD_RET_FAILURE;
710 ret = fit_config_verify(working_fdt, cfg_noffset);
712 return CMD_RET_SUCCESS;
714 return CMD_RET_FAILURE;
718 #ifdef CONFIG_OF_LIBFDT_OVERLAY
719 /* apply an overlay */
720 else if (strncmp(argv[1], "ap", 2) == 0) {
722 struct fdt_header *blob;
726 return CMD_RET_USAGE;
729 return CMD_RET_FAILURE;
731 addr = hextoul(argv[2], NULL);
732 blob = map_sysmem(addr, 0);
733 if (!fdt_valid(&blob))
734 return CMD_RET_FAILURE;
736 /* apply method prints messages on error */
737 ret = fdt_overlay_apply_verbose(working_fdt, blob);
739 return CMD_RET_FAILURE;
743 else if (strncmp(argv[1], "re", 2) == 0) {
746 extrasize = hextoul(argv[2], NULL);
749 fdt_shrink_to_minimum(working_fdt, extrasize);
752 /* Unrecognized command */
753 return CMD_RET_USAGE;
759 /****************************************************************************/
762 * Parse the user's input, partially heuristic. Valid formats:
763 * <0x00112233 4 05> - an array of cells. Numbers follow standard
765 * [00 11 22 .. nn] - byte stream
766 * "string" - If the the value doesn't start with "<" or "[", it is
767 * treated as a string. Note that the quotes are
768 * stripped by the parser before we get the string.
769 * newval: An array of strings containing the new property as specified
770 * on the command line
771 * count: The number of strings in the array
772 * data: A bytestream to be placed in the property
773 * len: The length of the resulting bytestream
775 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
777 char *cp; /* temporary char pointer */
778 char *newp; /* temporary newval char pointer */
779 unsigned long tmp; /* holds converted values */
785 /* An array of cells */
788 while ((*newp != '>') && (stridx < count)) {
790 * Keep searching until we find that last ">"
791 * That way users don't have to escape the spaces
794 newp = newval[++stridx];
799 tmp = simple_strtoul(cp, &newp, 0);
801 *(fdt32_t *)data = cpu_to_fdt32(tmp);
808 /* If the ptr didn't advance, something went wrong */
809 if ((newp - cp) <= 0) {
810 printf("Sorry, I could not convert \"%s\"\n",
820 printf("Unexpected character '%c'\n", *newp);
823 } else if (*newp == '[') {
825 * Byte stream. Convert the values.
828 while ((stridx < count) && (*newp != ']')) {
832 newp = newval[++stridx];
835 if (!isxdigit(*newp))
837 tmp = hextoul(newp, &newp);
838 *data++ = tmp & 0xFF;
842 printf("Unexpected character '%c'\n", *newp);
847 * Assume it is one or more strings. Copy it into our
848 * data area for convenience (including the
849 * terminating '\0's).
851 while (stridx < count) {
852 size_t length = strlen(newp) + 1;
856 newp = newval[++stridx];
862 /****************************************************************************/
865 * Heuristic to guess if this is a string or concatenated strings.
868 static int is_printable_string(const void *data, int len)
870 const char *s = data;
872 /* zero length is not */
876 /* must terminate with zero or '\n' */
877 if (s[len - 1] != '\0' && s[len - 1] != '\n')
880 /* printable or a null byte (concatenated strings) */
881 while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
883 * If we see a null, there are three possibilities:
884 * 1) If len == 1, it is the end of the string, printable
885 * 2) Next character also a null, not printable.
886 * 3) Next character not a null, continue to check.
898 /* Not the null termination, or not done yet: not printable */
899 if (*s != '\0' || (len != 0))
907 * Print the property in the best format, a heuristic guess. Print as
908 * a string, concatenated strings, a byte, word, double word, or (if all
909 * else fails) it is printed as a stream of bytes.
911 static void print_data(const void *data, int len)
914 const char *env_max_dump;
915 ulong max_dump = ULONG_MAX;
917 /* no data, don't print */
921 env_max_dump = env_get("fdt_max_dump");
923 max_dump = hextoul(env_max_dump, NULL);
926 * It is a string, but it may have multiple strings (embedded '\0's).
928 if (is_printable_string(data, len)) {
935 j += strlen(data) + 1;
936 data += strlen(data) + 1;
944 printf("* 0x%p [0x%08x]", data, len);
949 for (j = 0, p = data; j < len/4; j++)
950 printf("0x%08x%s", fdt32_to_cpu(p[j]),
951 j < (len/4 - 1) ? " " : "");
954 } else { /* anything else... hexdump */
956 printf("* 0x%p [0x%08x]", data, len);
961 for (j = 0, s = data; j < len; j++)
962 printf("%02x%s", s[j], j < len - 1 ? " " : "");
968 /****************************************************************************/
971 * Recursively print (a portion of) the working_fdt. The depth parameter
972 * determines how deeply nested the fdt is printed.
974 static int fdt_print(const char *pathp, char *prop, int depth)
976 static char tabs[MAX_LEVEL+1] =
977 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
978 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
979 const void *nodep; /* property node pointer */
980 int nodeoffset; /* node offset from libfdt */
981 int nextoffset; /* next node offset from libfdt */
982 uint32_t tag; /* tag */
983 int len; /* length of the property */
984 int level = 0; /* keep track of nesting level */
985 const struct fdt_property *fdt_prop;
987 nodeoffset = fdt_path_offset (working_fdt, pathp);
988 if (nodeoffset < 0) {
990 * Not found or something else bad happened.
992 printf ("libfdt fdt_path_offset() returned %s\n",
993 fdt_strerror(nodeoffset));
997 * The user passed in a property as well as node path.
998 * Print only the given property and then return.
1001 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
1003 /* no property value */
1004 printf("%s %s\n", pathp, prop);
1006 } else if (nodep && len > 0) {
1007 printf("%s = ", prop);
1008 print_data (nodep, len);
1012 printf ("libfdt fdt_getprop(): %s\n",
1019 * The user passed in a node path and no property,
1020 * print the node and all subnodes.
1023 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1025 case FDT_BEGIN_NODE:
1026 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1027 if (level <= depth) {
1029 pathp = "/* NULL pointer error */";
1031 pathp = "/"; /* root is nameless */
1033 &tabs[MAX_LEVEL - level], pathp);
1036 if (level >= MAX_LEVEL) {
1037 printf("Nested too deep, aborting.\n");
1044 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1046 level = -1; /* exit the loop */
1050 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1052 pathp = fdt_string(working_fdt,
1053 fdt32_to_cpu(fdt_prop->nameoff));
1054 len = fdt32_to_cpu(fdt_prop->len);
1055 nodep = fdt_prop->data;
1057 printf ("libfdt fdt_getprop(): %s\n",
1060 } else if (len == 0) {
1061 /* the property has no value */
1064 &tabs[MAX_LEVEL - level],
1067 if (level <= depth) {
1069 &tabs[MAX_LEVEL - level],
1071 print_data (nodep, len);
1077 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1083 printf("Unknown tag 0x%08X\n", tag);
1086 nodeoffset = nextoffset;
1091 /********************************************************************/
1092 #ifdef CONFIG_SYS_LONGHELP
1093 static char fdt_help_text[] =
1094 "addr [-c] [-q] <addr> [<size>] - Set the [control] fdt location to <addr>\n"
1095 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1096 "fdt apply <addr> - Apply overlay to the DT\n"
1098 #ifdef CONFIG_OF_BOARD_SETUP
1099 "fdt boardsetup - Do board-specific set up\n"
1101 #ifdef CONFIG_OF_SYSTEM_SETUP
1102 "fdt systemsetup - Do system-specific set up\n"
1104 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1105 "fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1106 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1107 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1108 "fdt get value <var> <path> <prop> [<index>] - Get <property> and store in <var>\n"
1109 " In case of stringlist property, use optional <index>\n"
1110 " to select string within the stringlist. Default is 0.\n"
1111 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1112 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1113 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1114 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1115 "fdt mknode <path> <node> - Create a new node after <path>\n"
1116 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1117 "fdt header [get <var> <member>] - Display header info\n"
1118 " get - get header member <member> and store it in <var>\n"
1119 "fdt bootcpu <id> - Set boot cpuid\n"
1120 "fdt memory <addr> <size> - Add/Update memory node\n"
1121 "fdt rsvmem print - Show current mem reserves\n"
1122 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1123 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1124 "fdt chosen [<start> <size>] - Add/update the /chosen branch in the tree\n"
1125 " <start>/<size> - initrd start addr/size\n"
1126 #if defined(CONFIG_FIT_SIGNATURE)
1127 "fdt checksign [<addr>] - check FIT signature\n"
1128 " <start> - addr of key blob\n"
1129 " default gd->fdt_blob\n"
1131 "NOTE: Dereference aliases by omitting the leading '/', "
1132 "e.g. fdt print ethernet0.";
1136 fdt, 255, 0, do_fdt,
1137 "flattened device tree utility commands", fdt_help_text