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