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 setenv_hex("fdtaddr", addr
);
50 * Get a value from the fdt and format it to be set in the environment
52 static int fdt_value_setenv(const void *nodep
, int len
, const char *var
)
54 if (is_printable_string(nodep
, len
))
55 setenv(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 getenv_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
]; /* storage for the property */
260 int len
; /* new length of the property */
261 int ret
; /* return value */
264 * Parameters: Node path, property, optional value.
267 return CMD_RET_USAGE
;
274 ret
= fdt_parse_prop(&argv
[4], argc
- 4, data
, &len
);
279 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
280 if (nodeoffset
< 0) {
282 * Not found or something else bad happened.
284 printf ("libfdt fdt_path_offset() returned %s\n",
285 fdt_strerror(nodeoffset
));
289 ret
= fdt_setprop(working_fdt
, nodeoffset
, prop
, data
, len
);
291 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret
));
295 /********************************************************************
296 * Get the value of a property in the working_fdt.
297 ********************************************************************/
298 } else if (argv
[1][0] == 'g') {
299 char *subcmd
; /* sub-command */
300 char *pathp
; /* path */
301 char *prop
; /* property */
302 char *var
; /* variable to store result */
303 int nodeoffset
; /* node offset from libfdt */
304 const void *nodep
; /* property node pointer */
305 int len
= 0; /* new length of the property */
308 * Parameters: Node path, property, optional value.
311 return CMD_RET_USAGE
;
315 if (argc
< 6 && subcmd
[0] != 's')
316 return CMD_RET_USAGE
;
322 nodeoffset
= fdt_path_offset(working_fdt
, pathp
);
323 if (nodeoffset
< 0) {
325 * Not found or something else bad happened.
327 printf("libfdt fdt_path_offset() returned %s\n",
328 fdt_strerror(nodeoffset
));
332 if (subcmd
[0] == 'n' || (subcmd
[0] == 's' && argc
== 5)) {
334 int startDepth
= fdt_node_depth(
335 working_fdt
, nodeoffset
);
336 int curDepth
= startDepth
;
338 int nextNodeOffset
= fdt_next_node(
339 working_fdt
, nodeoffset
, &curDepth
);
341 if (subcmd
[0] == 'n')
342 reqIndex
= simple_strtoul(argv
[5], NULL
, 16);
344 while (curDepth
> startDepth
) {
345 if (curDepth
== startDepth
+ 1)
347 if (subcmd
[0] == 'n' && curIndex
== reqIndex
) {
348 const char *nodeName
= fdt_get_name(
349 working_fdt
, nextNodeOffset
, NULL
);
351 setenv(var
, (char *)nodeName
);
354 nextNodeOffset
= fdt_next_node(
355 working_fdt
, nextNodeOffset
, &curDepth
);
356 if (nextNodeOffset
< 0)
359 if (subcmd
[0] == 's') {
360 /* get the num nodes at this level */
361 setenv_ulong(var
, curIndex
+ 1);
363 /* node index not found */
364 printf("libfdt node not found\n");
369 working_fdt
, nodeoffset
, prop
, &len
);
371 /* no property value */
374 } else if (len
> 0) {
375 if (subcmd
[0] == 'v') {
378 ret
= fdt_value_setenv(nodep
, len
, var
);
381 } else if (subcmd
[0] == 'a') {
385 sprintf(buf
, "0x%p", nodep
);
387 } else if (subcmd
[0] == 's') {
391 sprintf(buf
, "0x%08X", len
);
394 return CMD_RET_USAGE
;
397 printf("libfdt fdt_getprop(): %s\n",
404 * Print (recursive) / List (single level)
406 } else if ((argv
[1][0] == 'p') || (argv
[1][0] == 'l')) {
407 int depth
= MAX_LEVEL
; /* how deep to print */
408 char *pathp
; /* path */
409 char *prop
; /* property */
410 int ret
; /* return value */
411 static char root
[2] = "/";
414 * list is an alias for print, but limited to 1 level
416 if (argv
[1][0] == 'l') {
421 * Get the starting path. The root node is an oddball,
422 * the offset is zero and has no name.
433 ret
= fdt_print(pathp
, prop
, depth
);
438 * Remove a property/node
440 } else if (strncmp(argv
[1], "rm", 2) == 0) {
441 int nodeoffset
; /* node offset from libfdt */
445 * Get the path. The root node is an oddball, the offset
446 * is zero and has no name.
448 nodeoffset
= fdt_path_offset (working_fdt
, argv
[2]);
449 if (nodeoffset
< 0) {
451 * Not found or something else bad happened.
453 printf ("libfdt fdt_path_offset() returned %s\n",
454 fdt_strerror(nodeoffset
));
458 * Do the delete. A fourth parameter means delete a property,
459 * otherwise delete the node.
462 err
= fdt_delprop(working_fdt
, nodeoffset
, argv
[3]);
464 printf("libfdt fdt_delprop(): %s\n",
469 err
= fdt_del_node(working_fdt
, nodeoffset
);
471 printf("libfdt fdt_del_node(): %s\n",
478 * Display header info
480 } else if (argv
[1][0] == 'h') {
481 u32 version
= fdt_version(working_fdt
);
482 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt
));
483 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt
),
484 fdt_totalsize(working_fdt
));
485 printf("off_dt_struct:\t\t0x%x\n",
486 fdt_off_dt_struct(working_fdt
));
487 printf("off_dt_strings:\t\t0x%x\n",
488 fdt_off_dt_strings(working_fdt
));
489 printf("off_mem_rsvmap:\t\t0x%x\n",
490 fdt_off_mem_rsvmap(working_fdt
));
491 printf("version:\t\t%d\n", version
);
492 printf("last_comp_version:\t%d\n",
493 fdt_last_comp_version(working_fdt
));
495 printf("boot_cpuid_phys:\t0x%x\n",
496 fdt_boot_cpuid_phys(working_fdt
));
498 printf("size_dt_strings:\t0x%x\n",
499 fdt_size_dt_strings(working_fdt
));
501 printf("size_dt_struct:\t\t0x%x\n",
502 fdt_size_dt_struct(working_fdt
));
503 printf("number mem_rsv:\t\t0x%x\n",
504 fdt_num_mem_rsv(working_fdt
));
510 } else if (strncmp(argv
[1], "boo", 3) == 0) {
511 unsigned long tmp
= simple_strtoul(argv
[2], NULL
, 16);
512 fdt_set_boot_cpuid_phys(working_fdt
, tmp
);
517 } else if (strncmp(argv
[1], "me", 2) == 0) {
520 addr
= simple_strtoull(argv
[2], NULL
, 16);
521 size
= simple_strtoull(argv
[3], NULL
, 16);
522 err
= fdt_fixup_memory(working_fdt
, addr
, size
);
527 * mem reserve commands
529 } else if (strncmp(argv
[1], "rs", 2) == 0) {
530 if (argv
[2][0] == 'p') {
532 int total
= fdt_num_mem_rsv(working_fdt
);
534 printf("index\t\t start\t\t size\n");
535 printf("-------------------------------"
536 "-----------------\n");
537 for (j
= 0; j
< total
; j
++) {
538 err
= fdt_get_mem_rsv(working_fdt
, j
, &addr
, &size
);
540 printf("libfdt fdt_get_mem_rsv(): %s\n",
544 printf(" %x\t%08x%08x\t%08x%08x\n", j
,
546 (u32
)(addr
& 0xffffffff),
548 (u32
)(size
& 0xffffffff));
550 } else if (argv
[2][0] == 'a') {
553 addr
= simple_strtoull(argv
[3], NULL
, 16);
554 size
= simple_strtoull(argv
[4], NULL
, 16);
555 err
= fdt_add_mem_rsv(working_fdt
, addr
, size
);
558 printf("libfdt fdt_add_mem_rsv(): %s\n",
562 } else if (argv
[2][0] == 'd') {
563 unsigned long idx
= simple_strtoul(argv
[3], NULL
, 16);
564 int err
= fdt_del_mem_rsv(working_fdt
, idx
);
567 printf("libfdt fdt_del_mem_rsv(): %s\n",
572 /* Unrecognized command */
573 return CMD_RET_USAGE
;
576 #ifdef CONFIG_OF_BOARD_SETUP
577 /* Call the board-specific fixup routine */
578 else if (strncmp(argv
[1], "boa", 3) == 0) {
579 int err
= ft_board_setup(working_fdt
, gd
->bd
);
582 printf("Failed to update board information in FDT: %s\n",
584 return CMD_RET_FAILURE
;
588 /* Create a chosen node */
589 else if (strncmp(argv
[1], "cho", 3) == 0) {
590 unsigned long initrd_start
= 0, initrd_end
= 0;
592 if ((argc
!= 2) && (argc
!= 4))
593 return CMD_RET_USAGE
;
596 initrd_start
= simple_strtoul(argv
[2], NULL
, 16);
597 initrd_end
= simple_strtoul(argv
[3], NULL
, 16);
600 fdt_chosen(working_fdt
);
601 fdt_initrd(working_fdt
, initrd_start
, initrd_end
);
603 #if defined(CONFIG_FIT_SIGNATURE)
604 } else if (strncmp(argv
[1], "che", 3) == 0) {
608 struct fdt_header
*blob
;
611 return CMD_RET_FAILURE
;
614 addr
= simple_strtoul(argv
[2], NULL
, 16);
615 blob
= map_sysmem(addr
, 0);
617 blob
= (struct fdt_header
*)gd
->fdt_blob
;
619 if (!fdt_valid(&blob
))
623 cfg_noffset
= fit_conf_get_node(working_fdt
, NULL
);
625 printf("Could not find configuration node: %s\n",
626 fdt_strerror(cfg_noffset
));
627 return CMD_RET_FAILURE
;
630 ret
= fit_config_verify(working_fdt
, cfg_noffset
);
632 return CMD_RET_SUCCESS
;
634 return CMD_RET_FAILURE
;
638 #ifdef CONFIG_OF_LIBFDT_OVERLAY
639 /* apply an overlay */
640 else if (strncmp(argv
[1], "ap", 2) == 0) {
642 struct fdt_header
*blob
;
646 return CMD_RET_USAGE
;
649 return CMD_RET_FAILURE
;
651 addr
= simple_strtoul(argv
[2], NULL
, 16);
652 blob
= map_sysmem(addr
, 0);
653 if (!fdt_valid(&blob
))
654 return CMD_RET_FAILURE
;
656 ret
= fdt_overlay_apply(working_fdt
, blob
);
658 printf("fdt_overlay_apply(): %s\n", fdt_strerror(ret
));
659 return CMD_RET_FAILURE
;
664 else if (strncmp(argv
[1], "re", 2) == 0) {
667 extrasize
= simple_strtoul(argv
[2], NULL
, 16);
670 fdt_shrink_to_minimum(working_fdt
, extrasize
);
673 /* Unrecognized command */
674 return CMD_RET_USAGE
;
680 /****************************************************************************/
683 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
685 * @blobp: Pointer to FDT pointer
686 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
688 static int fdt_valid(struct fdt_header
**blobp
)
690 const void *blob
= *blobp
;
694 printf ("The address of the fdt is invalid (NULL).\n");
698 err
= fdt_check_header(blob
);
700 return 1; /* valid */
703 printf("libfdt fdt_check_header(): %s", fdt_strerror(err
));
705 * Be more informative on bad version.
707 if (err
== -FDT_ERR_BADVERSION
) {
708 if (fdt_version(blob
) <
709 FDT_FIRST_SUPPORTED_VERSION
) {
710 printf (" - too old, fdt %d < %d",
712 FDT_FIRST_SUPPORTED_VERSION
);
714 if (fdt_last_comp_version(blob
) >
715 FDT_LAST_SUPPORTED_VERSION
) {
716 printf (" - too new, fdt %d > %d",
718 FDT_LAST_SUPPORTED_VERSION
);
728 /****************************************************************************/
731 * Parse the user's input, partially heuristic. Valid formats:
732 * <0x00112233 4 05> - an array of cells. Numbers follow standard
734 * [00 11 22 .. nn] - byte stream
735 * "string" - If the the value doesn't start with "<" or "[", it is
736 * treated as a string. Note that the quotes are
737 * stripped by the parser before we get the string.
738 * newval: An array of strings containing the new property as specified
739 * on the command line
740 * count: The number of strings in the array
741 * data: A bytestream to be placed in the property
742 * len: The length of the resulting bytestream
744 static int fdt_parse_prop(char * const *newval
, int count
, char *data
, int *len
)
746 char *cp
; /* temporary char pointer */
747 char *newp
; /* temporary newval char pointer */
748 unsigned long tmp
; /* holds converted values */
754 /* An array of cells */
757 while ((*newp
!= '>') && (stridx
< count
)) {
759 * Keep searching until we find that last ">"
760 * That way users don't have to escape the spaces
763 newp
= newval
[++stridx
];
768 tmp
= simple_strtoul(cp
, &newp
, 0);
769 *(fdt32_t
*)data
= cpu_to_fdt32(tmp
);
773 /* If the ptr didn't advance, something went wrong */
774 if ((newp
- cp
) <= 0) {
775 printf("Sorry, I could not convert \"%s\"\n",
785 printf("Unexpected character '%c'\n", *newp
);
788 } else if (*newp
== '[') {
790 * Byte stream. Convert the values.
793 while ((stridx
< count
) && (*newp
!= ']')) {
797 newp
= newval
[++stridx
];
800 if (!isxdigit(*newp
))
802 tmp
= simple_strtoul(newp
, &newp
, 16);
803 *data
++ = tmp
& 0xFF;
807 printf("Unexpected character '%c'\n", *newp
);
812 * Assume it is one or more strings. Copy it into our
813 * data area for convenience (including the
814 * terminating '\0's).
816 while (stridx
< count
) {
817 size_t length
= strlen(newp
) + 1;
821 newp
= newval
[++stridx
];
827 /****************************************************************************/
830 * Heuristic to guess if this is a string or concatenated strings.
833 static int is_printable_string(const void *data
, int len
)
835 const char *s
= data
;
837 /* zero length is not */
841 /* must terminate with zero or '\n' */
842 if (s
[len
- 1] != '\0' && s
[len
- 1] != '\n')
845 /* printable or a null byte (concatenated strings) */
846 while (((*s
== '\0') || isprint(*s
) || isspace(*s
)) && (len
> 0)) {
848 * If we see a null, there are three possibilities:
849 * 1) If len == 1, it is the end of the string, printable
850 * 2) Next character also a null, not printable.
851 * 3) Next character not a null, continue to check.
863 /* Not the null termination, or not done yet: not printable */
864 if (*s
!= '\0' || (len
!= 0))
872 * Print the property in the best format, a heuristic guess. Print as
873 * a string, concatenated strings, a byte, word, double word, or (if all
874 * else fails) it is printed as a stream of bytes.
876 static void print_data(const void *data
, int len
)
880 /* no data, don't print */
885 * It is a string, but it may have multiple strings (embedded '\0's).
887 if (is_printable_string(data
, len
)) {
894 j
+= strlen(data
) + 1;
895 data
+= strlen(data
) + 1;
902 if (len
> CMD_FDT_MAX_DUMP
)
903 printf("* 0x%p [0x%08x]", data
, len
);
908 for (j
= 0, p
= data
; j
< len
/4; j
++)
909 printf("0x%08x%s", fdt32_to_cpu(p
[j
]),
910 j
< (len
/4 - 1) ? " " : "");
913 } else { /* anything else... hexdump */
914 if (len
> CMD_FDT_MAX_DUMP
)
915 printf("* 0x%p [0x%08x]", data
, len
);
920 for (j
= 0, s
= data
; j
< len
; j
++)
921 printf("%02x%s", s
[j
], j
< len
- 1 ? " " : "");
927 /****************************************************************************/
930 * Recursively print (a portion of) the working_fdt. The depth parameter
931 * determines how deeply nested the fdt is printed.
933 static int fdt_print(const char *pathp
, char *prop
, int depth
)
935 static char tabs
[MAX_LEVEL
+1] =
936 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
937 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
938 const void *nodep
; /* property node pointer */
939 int nodeoffset
; /* node offset from libfdt */
940 int nextoffset
; /* next node offset from libfdt */
941 uint32_t tag
; /* tag */
942 int len
; /* length of the property */
943 int level
= 0; /* keep track of nesting level */
944 const struct fdt_property
*fdt_prop
;
946 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
947 if (nodeoffset
< 0) {
949 * Not found or something else bad happened.
951 printf ("libfdt fdt_path_offset() returned %s\n",
952 fdt_strerror(nodeoffset
));
956 * The user passed in a property as well as node path.
957 * Print only the given property and then return.
960 nodep
= fdt_getprop (working_fdt
, nodeoffset
, prop
, &len
);
962 /* no property value */
963 printf("%s %s\n", pathp
, prop
);
965 } else if (len
> 0) {
966 printf("%s = ", prop
);
967 print_data (nodep
, len
);
971 printf ("libfdt fdt_getprop(): %s\n",
978 * The user passed in a node path and no property,
979 * print the node and all subnodes.
982 tag
= fdt_next_tag(working_fdt
, nodeoffset
, &nextoffset
);
985 pathp
= fdt_get_name(working_fdt
, nodeoffset
, NULL
);
986 if (level
<= depth
) {
988 pathp
= "/* NULL pointer error */";
990 pathp
= "/"; /* root is nameless */
992 &tabs
[MAX_LEVEL
- level
], pathp
);
995 if (level
>= MAX_LEVEL
) {
996 printf("Nested too deep, aborting.\n");
1003 printf("%s};\n", &tabs
[MAX_LEVEL
- level
]);
1005 level
= -1; /* exit the loop */
1009 fdt_prop
= fdt_offset_ptr(working_fdt
, nodeoffset
,
1011 pathp
= fdt_string(working_fdt
,
1012 fdt32_to_cpu(fdt_prop
->nameoff
));
1013 len
= fdt32_to_cpu(fdt_prop
->len
);
1014 nodep
= fdt_prop
->data
;
1016 printf ("libfdt fdt_getprop(): %s\n",
1019 } else if (len
== 0) {
1020 /* the property has no value */
1023 &tabs
[MAX_LEVEL
- level
],
1026 if (level
<= depth
) {
1028 &tabs
[MAX_LEVEL
- level
],
1030 print_data (nodep
, len
);
1036 printf("%s/* NOP */\n", &tabs
[MAX_LEVEL
- level
]);
1042 printf("Unknown tag 0x%08X\n", tag
);
1045 nodeoffset
= nextoffset
;
1050 /********************************************************************/
1051 #ifdef CONFIG_SYS_LONGHELP
1052 static char fdt_help_text
[] =
1053 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
1054 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1055 "fdt apply <addr> - Apply overlay to the DT\n"
1057 #ifdef CONFIG_OF_BOARD_SETUP
1058 "fdt boardsetup - Do board-specific set up\n"
1060 #ifdef CONFIG_OF_SYSTEM_SETUP
1061 "fdt systemsetup - Do system-specific set up\n"
1063 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1064 "fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1065 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1066 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1067 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
1068 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1069 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1070 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1071 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1072 "fdt mknode <path> <node> - Create a new node after <path>\n"
1073 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1074 "fdt header - Display header info\n"
1075 "fdt bootcpu <id> - Set boot cpuid\n"
1076 "fdt memory <addr> <size> - Add/Update memory node\n"
1077 "fdt rsvmem print - Show current mem reserves\n"
1078 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1079 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1080 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1081 " <start>/<end> - initrd start/end addr\n"
1082 #if defined(CONFIG_FIT_SIGNATURE)
1083 "fdt checksign [<addr>] - check FIT signature\n"
1084 " <start> - addr of key blob\n"
1085 " default gd->fdt_blob\n"
1087 "NOTE: Dereference aliases by omitting the leading '/', "
1088 "e.g. fdt print ethernet0.";
1092 fdt
, 255, 0, do_fdt
,
1093 "flattened device tree utility commands", fdt_help_text