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", *(uint32_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 (argv
[1][0] == 'a') {
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
;
213 } else if (strncmp(argv
[1], "mk", 2) == 0) {
214 char *pathp
; /* path */
215 char *nodep
; /* new node to add */
216 int nodeoffset
; /* node offset from libfdt */
220 * Parameters: Node path, new node to be appended to the path.
223 return CMD_RET_USAGE
;
228 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
229 if (nodeoffset
< 0) {
231 * Not found or something else bad happened.
233 printf ("libfdt fdt_path_offset() returned %s\n",
234 fdt_strerror(nodeoffset
));
237 err
= fdt_add_subnode(working_fdt
, nodeoffset
, nodep
);
239 printf ("libfdt fdt_add_subnode(): %s\n",
245 * Set the value of a property in the working_fdt.
247 } else if (argv
[1][0] == 's') {
248 char *pathp
; /* path */
249 char *prop
; /* property */
250 int nodeoffset
; /* node offset from libfdt */
251 static char data
[SCRATCHPAD
]; /* storage for the property */
252 int len
; /* new length of the property */
253 int ret
; /* return value */
256 * Parameters: Node path, property, optional value.
259 return CMD_RET_USAGE
;
266 ret
= fdt_parse_prop(&argv
[4], argc
- 4, data
, &len
);
271 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
272 if (nodeoffset
< 0) {
274 * Not found or something else bad happened.
276 printf ("libfdt fdt_path_offset() returned %s\n",
277 fdt_strerror(nodeoffset
));
281 ret
= fdt_setprop(working_fdt
, nodeoffset
, prop
, data
, len
);
283 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret
));
287 /********************************************************************
288 * Get the value of a property in the working_fdt.
289 ********************************************************************/
290 } else if (argv
[1][0] == 'g') {
291 char *subcmd
; /* sub-command */
292 char *pathp
; /* path */
293 char *prop
; /* property */
294 char *var
; /* variable to store result */
295 int nodeoffset
; /* node offset from libfdt */
296 const void *nodep
; /* property node pointer */
297 int len
= 0; /* new length of the property */
300 * Parameters: Node path, property, optional value.
303 return CMD_RET_USAGE
;
307 if (argc
< 6 && subcmd
[0] != 's')
308 return CMD_RET_USAGE
;
314 nodeoffset
= fdt_path_offset(working_fdt
, pathp
);
315 if (nodeoffset
< 0) {
317 * Not found or something else bad happened.
319 printf("libfdt fdt_path_offset() returned %s\n",
320 fdt_strerror(nodeoffset
));
324 if (subcmd
[0] == 'n' || (subcmd
[0] == 's' && argc
== 5)) {
326 int startDepth
= fdt_node_depth(
327 working_fdt
, nodeoffset
);
328 int curDepth
= startDepth
;
330 int nextNodeOffset
= fdt_next_node(
331 working_fdt
, nodeoffset
, &curDepth
);
333 if (subcmd
[0] == 'n')
334 reqIndex
= simple_strtoul(argv
[5], NULL
, 16);
336 while (curDepth
> startDepth
) {
337 if (curDepth
== startDepth
+ 1)
339 if (subcmd
[0] == 'n' && curIndex
== reqIndex
) {
340 const char *nodeName
= fdt_get_name(
341 working_fdt
, nextNodeOffset
, NULL
);
343 setenv(var
, (char *)nodeName
);
346 nextNodeOffset
= fdt_next_node(
347 working_fdt
, nextNodeOffset
, &curDepth
);
348 if (nextNodeOffset
< 0)
351 if (subcmd
[0] == 's') {
352 /* get the num nodes at this level */
353 setenv_ulong(var
, curIndex
+ 1);
355 /* node index not found */
356 printf("libfdt node not found\n");
361 working_fdt
, nodeoffset
, prop
, &len
);
363 /* no property value */
366 } else if (len
> 0) {
367 if (subcmd
[0] == 'v') {
370 ret
= fdt_value_setenv(nodep
, len
, var
);
373 } else if (subcmd
[0] == 'a') {
377 sprintf(buf
, "0x%p", nodep
);
379 } else if (subcmd
[0] == 's') {
383 sprintf(buf
, "0x%08X", len
);
386 return CMD_RET_USAGE
;
389 printf("libfdt fdt_getprop(): %s\n",
396 * Print (recursive) / List (single level)
398 } else if ((argv
[1][0] == 'p') || (argv
[1][0] == 'l')) {
399 int depth
= MAX_LEVEL
; /* how deep to print */
400 char *pathp
; /* path */
401 char *prop
; /* property */
402 int ret
; /* return value */
403 static char root
[2] = "/";
406 * list is an alias for print, but limited to 1 level
408 if (argv
[1][0] == 'l') {
413 * Get the starting path. The root node is an oddball,
414 * the offset is zero and has no name.
425 ret
= fdt_print(pathp
, prop
, depth
);
430 * Remove a property/node
432 } else if (strncmp(argv
[1], "rm", 2) == 0) {
433 int nodeoffset
; /* node offset from libfdt */
437 * Get the path. The root node is an oddball, the offset
438 * is zero and has no name.
440 nodeoffset
= fdt_path_offset (working_fdt
, argv
[2]);
441 if (nodeoffset
< 0) {
443 * Not found or something else bad happened.
445 printf ("libfdt fdt_path_offset() returned %s\n",
446 fdt_strerror(nodeoffset
));
450 * Do the delete. A fourth parameter means delete a property,
451 * otherwise delete the node.
454 err
= fdt_delprop(working_fdt
, nodeoffset
, argv
[3]);
456 printf("libfdt fdt_delprop(): %s\n",
461 err
= fdt_del_node(working_fdt
, nodeoffset
);
463 printf("libfdt fdt_del_node(): %s\n",
470 * Display header info
472 } else if (argv
[1][0] == 'h') {
473 u32 version
= fdt_version(working_fdt
);
474 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt
));
475 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt
),
476 fdt_totalsize(working_fdt
));
477 printf("off_dt_struct:\t\t0x%x\n",
478 fdt_off_dt_struct(working_fdt
));
479 printf("off_dt_strings:\t\t0x%x\n",
480 fdt_off_dt_strings(working_fdt
));
481 printf("off_mem_rsvmap:\t\t0x%x\n",
482 fdt_off_mem_rsvmap(working_fdt
));
483 printf("version:\t\t%d\n", version
);
484 printf("last_comp_version:\t%d\n",
485 fdt_last_comp_version(working_fdt
));
487 printf("boot_cpuid_phys:\t0x%x\n",
488 fdt_boot_cpuid_phys(working_fdt
));
490 printf("size_dt_strings:\t0x%x\n",
491 fdt_size_dt_strings(working_fdt
));
493 printf("size_dt_struct:\t\t0x%x\n",
494 fdt_size_dt_struct(working_fdt
));
495 printf("number mem_rsv:\t\t0x%x\n",
496 fdt_num_mem_rsv(working_fdt
));
502 } else if (strncmp(argv
[1], "boo", 3) == 0) {
503 unsigned long tmp
= simple_strtoul(argv
[2], NULL
, 16);
504 fdt_set_boot_cpuid_phys(working_fdt
, tmp
);
509 } else if (strncmp(argv
[1], "me", 2) == 0) {
512 addr
= simple_strtoull(argv
[2], NULL
, 16);
513 size
= simple_strtoull(argv
[3], NULL
, 16);
514 err
= fdt_fixup_memory(working_fdt
, addr
, size
);
519 * mem reserve commands
521 } else if (strncmp(argv
[1], "rs", 2) == 0) {
522 if (argv
[2][0] == 'p') {
524 int total
= fdt_num_mem_rsv(working_fdt
);
526 printf("index\t\t start\t\t size\n");
527 printf("-------------------------------"
528 "-----------------\n");
529 for (j
= 0; j
< total
; j
++) {
530 err
= fdt_get_mem_rsv(working_fdt
, j
, &addr
, &size
);
532 printf("libfdt fdt_get_mem_rsv(): %s\n",
536 printf(" %x\t%08x%08x\t%08x%08x\n", j
,
538 (u32
)(addr
& 0xffffffff),
540 (u32
)(size
& 0xffffffff));
542 } else if (argv
[2][0] == 'a') {
545 addr
= simple_strtoull(argv
[3], NULL
, 16);
546 size
= simple_strtoull(argv
[4], NULL
, 16);
547 err
= fdt_add_mem_rsv(working_fdt
, addr
, size
);
550 printf("libfdt fdt_add_mem_rsv(): %s\n",
554 } else if (argv
[2][0] == 'd') {
555 unsigned long idx
= simple_strtoul(argv
[3], NULL
, 16);
556 int err
= fdt_del_mem_rsv(working_fdt
, idx
);
559 printf("libfdt fdt_del_mem_rsv(): %s\n",
564 /* Unrecognized command */
565 return CMD_RET_USAGE
;
568 #ifdef CONFIG_OF_BOARD_SETUP
569 /* Call the board-specific fixup routine */
570 else if (strncmp(argv
[1], "boa", 3) == 0) {
571 int err
= ft_board_setup(working_fdt
, gd
->bd
);
574 printf("Failed to update board information in FDT: %s\n",
576 return CMD_RET_FAILURE
;
580 #ifdef CONFIG_OF_SYSTEM_SETUP
581 /* Call the board-specific fixup routine */
582 else if (strncmp(argv
[1], "sys", 3) == 0) {
583 int err
= ft_system_setup(working_fdt
, gd
->bd
);
586 printf("Failed to add system information to FDT: %s\n",
588 return CMD_RET_FAILURE
;
592 /* Create a chosen node */
593 else if (strncmp(argv
[1], "cho", 3) == 0) {
594 unsigned long initrd_start
= 0, initrd_end
= 0;
596 if ((argc
!= 2) && (argc
!= 4))
597 return CMD_RET_USAGE
;
600 initrd_start
= simple_strtoul(argv
[2], NULL
, 16);
601 initrd_end
= simple_strtoul(argv
[3], NULL
, 16);
604 fdt_chosen(working_fdt
);
605 fdt_initrd(working_fdt
, initrd_start
, initrd_end
);
607 #if defined(CONFIG_FIT_SIGNATURE)
608 } else if (strncmp(argv
[1], "che", 3) == 0) {
612 struct fdt_header
*blob
;
615 return CMD_RET_FAILURE
;
618 addr
= simple_strtoul(argv
[2], NULL
, 16);
619 blob
= map_sysmem(addr
, 0);
621 blob
= (struct fdt_header
*)gd
->fdt_blob
;
623 if (!fdt_valid(&blob
))
627 cfg_noffset
= fit_conf_get_node(working_fdt
, NULL
);
629 printf("Could not find configuration node: %s\n",
630 fdt_strerror(cfg_noffset
));
631 return CMD_RET_FAILURE
;
634 ret
= fit_config_verify(working_fdt
, cfg_noffset
);
636 return CMD_RET_SUCCESS
;
638 return CMD_RET_FAILURE
;
643 else if (strncmp(argv
[1], "re", 2) == 0) {
644 fdt_shrink_to_minimum(working_fdt
);
647 /* Unrecognized command */
648 return CMD_RET_USAGE
;
654 /****************************************************************************/
657 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
659 * @blobp: Pointer to FDT pointer
660 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
662 static int fdt_valid(struct fdt_header
**blobp
)
664 const void *blob
= *blobp
;
668 printf ("The address of the fdt is invalid (NULL).\n");
672 err
= fdt_check_header(blob
);
674 return 1; /* valid */
677 printf("libfdt fdt_check_header(): %s", fdt_strerror(err
));
679 * Be more informative on bad version.
681 if (err
== -FDT_ERR_BADVERSION
) {
682 if (fdt_version(blob
) <
683 FDT_FIRST_SUPPORTED_VERSION
) {
684 printf (" - too old, fdt %d < %d",
686 FDT_FIRST_SUPPORTED_VERSION
);
688 if (fdt_last_comp_version(blob
) >
689 FDT_LAST_SUPPORTED_VERSION
) {
690 printf (" - too new, fdt %d > %d",
692 FDT_LAST_SUPPORTED_VERSION
);
702 /****************************************************************************/
705 * Parse the user's input, partially heuristic. Valid formats:
706 * <0x00112233 4 05> - an array of cells. Numbers follow standard
708 * [00 11 22 .. nn] - byte stream
709 * "string" - If the the value doesn't start with "<" or "[", it is
710 * treated as a string. Note that the quotes are
711 * stripped by the parser before we get the string.
712 * newval: An array of strings containing the new property as specified
713 * on the command line
714 * count: The number of strings in the array
715 * data: A bytestream to be placed in the property
716 * len: The length of the resulting bytestream
718 static int fdt_parse_prop(char * const *newval
, int count
, char *data
, int *len
)
720 char *cp
; /* temporary char pointer */
721 char *newp
; /* temporary newval char pointer */
722 unsigned long tmp
; /* holds converted values */
728 /* An array of cells */
731 while ((*newp
!= '>') && (stridx
< count
)) {
733 * Keep searching until we find that last ">"
734 * That way users don't have to escape the spaces
737 newp
= newval
[++stridx
];
742 tmp
= simple_strtoul(cp
, &newp
, 0);
743 *(__be32
*)data
= __cpu_to_be32(tmp
);
747 /* If the ptr didn't advance, something went wrong */
748 if ((newp
- cp
) <= 0) {
749 printf("Sorry, I could not convert \"%s\"\n",
759 printf("Unexpected character '%c'\n", *newp
);
762 } else if (*newp
== '[') {
764 * Byte stream. Convert the values.
767 while ((stridx
< count
) && (*newp
!= ']')) {
771 newp
= newval
[++stridx
];
774 if (!isxdigit(*newp
))
776 tmp
= simple_strtoul(newp
, &newp
, 16);
777 *data
++ = tmp
& 0xFF;
781 printf("Unexpected character '%c'\n", *newp
);
786 * Assume it is one or more strings. Copy it into our
787 * data area for convenience (including the
788 * terminating '\0's).
790 while (stridx
< count
) {
791 size_t length
= strlen(newp
) + 1;
795 newp
= newval
[++stridx
];
801 /****************************************************************************/
804 * Heuristic to guess if this is a string or concatenated strings.
807 static int is_printable_string(const void *data
, int len
)
809 const char *s
= data
;
811 /* zero length is not */
815 /* must terminate with zero or '\n' */
816 if (s
[len
- 1] != '\0' && s
[len
- 1] != '\n')
819 /* printable or a null byte (concatenated strings) */
820 while (((*s
== '\0') || isprint(*s
) || isspace(*s
)) && (len
> 0)) {
822 * If we see a null, there are three possibilities:
823 * 1) If len == 1, it is the end of the string, printable
824 * 2) Next character also a null, not printable.
825 * 3) Next character not a null, continue to check.
837 /* Not the null termination, or not done yet: not printable */
838 if (*s
!= '\0' || (len
!= 0))
846 * Print the property in the best format, a heuristic guess. Print as
847 * a string, concatenated strings, a byte, word, double word, or (if all
848 * else fails) it is printed as a stream of bytes.
850 static void print_data(const void *data
, int len
)
854 /* no data, don't print */
859 * It is a string, but it may have multiple strings (embedded '\0's).
861 if (is_printable_string(data
, len
)) {
868 j
+= strlen(data
) + 1;
869 data
+= strlen(data
) + 1;
876 if (len
> CONFIG_CMD_FDT_MAX_DUMP
)
877 printf("* 0x%p [0x%08x]", data
, len
);
882 for (j
= 0, p
= data
; j
< len
/4; j
++)
883 printf("0x%08x%s", fdt32_to_cpu(p
[j
]),
884 j
< (len
/4 - 1) ? " " : "");
887 } else { /* anything else... hexdump */
888 if (len
> CONFIG_CMD_FDT_MAX_DUMP
)
889 printf("* 0x%p [0x%08x]", data
, len
);
894 for (j
= 0, s
= data
; j
< len
; j
++)
895 printf("%02x%s", s
[j
], j
< len
- 1 ? " " : "");
901 /****************************************************************************/
904 * Recursively print (a portion of) the working_fdt. The depth parameter
905 * determines how deeply nested the fdt is printed.
907 static int fdt_print(const char *pathp
, char *prop
, int depth
)
909 static char tabs
[MAX_LEVEL
+1] =
910 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
911 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
912 const void *nodep
; /* property node pointer */
913 int nodeoffset
; /* node offset from libfdt */
914 int nextoffset
; /* next node offset from libfdt */
915 uint32_t tag
; /* tag */
916 int len
; /* length of the property */
917 int level
= 0; /* keep track of nesting level */
918 const struct fdt_property
*fdt_prop
;
920 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
921 if (nodeoffset
< 0) {
923 * Not found or something else bad happened.
925 printf ("libfdt fdt_path_offset() returned %s\n",
926 fdt_strerror(nodeoffset
));
930 * The user passed in a property as well as node path.
931 * Print only the given property and then return.
934 nodep
= fdt_getprop (working_fdt
, nodeoffset
, prop
, &len
);
936 /* no property value */
937 printf("%s %s\n", pathp
, prop
);
939 } else if (len
> 0) {
940 printf("%s = ", prop
);
941 print_data (nodep
, len
);
945 printf ("libfdt fdt_getprop(): %s\n",
952 * The user passed in a node path and no property,
953 * print the node and all subnodes.
956 tag
= fdt_next_tag(working_fdt
, nodeoffset
, &nextoffset
);
959 pathp
= fdt_get_name(working_fdt
, nodeoffset
, NULL
);
960 if (level
<= depth
) {
962 pathp
= "/* NULL pointer error */";
964 pathp
= "/"; /* root is nameless */
966 &tabs
[MAX_LEVEL
- level
], pathp
);
969 if (level
>= MAX_LEVEL
) {
970 printf("Nested too deep, aborting.\n");
977 printf("%s};\n", &tabs
[MAX_LEVEL
- level
]);
979 level
= -1; /* exit the loop */
983 fdt_prop
= fdt_offset_ptr(working_fdt
, nodeoffset
,
985 pathp
= fdt_string(working_fdt
,
986 fdt32_to_cpu(fdt_prop
->nameoff
));
987 len
= fdt32_to_cpu(fdt_prop
->len
);
988 nodep
= fdt_prop
->data
;
990 printf ("libfdt fdt_getprop(): %s\n",
993 } else if (len
== 0) {
994 /* the property has no value */
997 &tabs
[MAX_LEVEL
- level
],
1000 if (level
<= depth
) {
1002 &tabs
[MAX_LEVEL
- level
],
1004 print_data (nodep
, len
);
1010 printf("%s/* NOP */\n", &tabs
[MAX_LEVEL
- level
]);
1016 printf("Unknown tag 0x%08X\n", tag
);
1019 nodeoffset
= nextoffset
;
1024 /********************************************************************/
1025 #ifdef CONFIG_SYS_LONGHELP
1026 static char fdt_help_text
[] =
1027 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
1028 #ifdef CONFIG_OF_BOARD_SETUP
1029 "fdt boardsetup - Do board-specific set up\n"
1031 #ifdef CONFIG_OF_SYSTEM_SETUP
1032 "fdt systemsetup - Do system-specific set up\n"
1034 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1035 "fdt resize - Resize fdt to size + padding to 4k addr\n"
1036 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1037 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1038 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
1039 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1040 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1041 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1042 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1043 "fdt mknode <path> <node> - Create a new node after <path>\n"
1044 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1045 "fdt header - Display header info\n"
1046 "fdt bootcpu <id> - Set boot cpuid\n"
1047 "fdt memory <addr> <size> - Add/Update memory node\n"
1048 "fdt rsvmem print - Show current mem reserves\n"
1049 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1050 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1051 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1052 " <start>/<end> - initrd start/end addr\n"
1053 #if defined(CONFIG_FIT_SIGNATURE)
1054 "fdt checksign [<addr>] - check FIT signature\n"
1055 " <start> - addr of key blob\n"
1056 " default gd->fdt_blob\n"
1058 "NOTE: Dereference aliases by omiting the leading '/', "
1059 "e.g. fdt print ethernet0.";
1063 fdt
, 255, 0, do_fdt
,
1064 "flattened device tree utility commands", fdt_help_text