1 #ifndef _LIBFDT_H |
|
2 #define _LIBFDT_H |
|
3 /* |
|
4 * libfdt - Flat Device Tree manipulation |
|
5 * Copyright (C) 2006 David Gibson, IBM Corporation. |
|
6 * |
|
7 * libfdt is dual licensed: you can use it either under the terms of |
|
8 * the GPL, or the BSD license, at your option. |
|
9 * |
|
10 * a) This library is free software; you can redistribute it and/or |
|
11 * modify it under the terms of the GNU General Public License as |
|
12 * published by the Free Software Foundation; either version 2 of the |
|
13 * License, or (at your option) any later version. |
|
14 * |
|
15 * This library is distributed in the hope that it will be useful, |
|
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
18 * GNU General Public License for more details. |
|
19 * |
|
20 * You should have received a copy of the GNU General Public |
|
21 * License along with this library; if not, write to the Free |
|
22 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, |
|
23 * MA 02110-1301 USA |
|
24 * |
|
25 * Alternatively, |
|
26 * |
|
27 * b) Redistribution and use in source and binary forms, with or |
|
28 * without modification, are permitted provided that the following |
|
29 * conditions are met: |
|
30 * |
|
31 * 1. Redistributions of source code must retain the above |
|
32 * copyright notice, this list of conditions and the following |
|
33 * disclaimer. |
|
34 * 2. Redistributions in binary form must reproduce the above |
|
35 * copyright notice, this list of conditions and the following |
|
36 * disclaimer in the documentation and/or other materials |
|
37 * provided with the distribution. |
|
38 * |
|
39 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
|
40 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
|
41 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
|
42 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
|
43 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
|
44 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
|
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
|
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
|
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
|
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
|
49 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
|
50 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
|
51 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
52 */ |
|
53 |
|
54 #ifdef __cplusplus |
|
55 extern "C" { |
|
56 #endif |
|
57 |
|
58 #include "libfdt_env.h" |
|
59 #include "fdt.h" |
|
60 |
|
61 #define FDT_FIRST_SUPPORTED_VERSION 0x10 |
|
62 #define FDT_LAST_SUPPORTED_VERSION 0x11 |
|
63 |
|
64 /* Error codes: informative error codes */ |
|
65 #define FDT_ERR_NOTFOUND 1 |
|
66 /* FDT_ERR_NOTFOUND: The requested node or property does not exist */ |
|
67 #define FDT_ERR_EXISTS 2 |
|
68 /* FDT_ERR_EXISTS: Attemped to create a node or property which |
|
69 * already exists */ |
|
70 #define FDT_ERR_NOSPACE 3 |
|
71 /* FDT_ERR_NOSPACE: Operation needed to expand the device |
|
72 * tree, but its buffer did not have sufficient space to |
|
73 * contain the expanded tree. Use fdt_open_into() to move the |
|
74 * device tree to a buffer with more space. */ |
|
75 |
|
76 /* Error codes: codes for bad parameters */ |
|
77 #define FDT_ERR_BADOFFSET 4 |
|
78 /* FDT_ERR_BADOFFSET: Function was passed a structure block |
|
79 * offset which is out-of-bounds, or which points to an |
|
80 * unsuitable part of the structure for the operation. */ |
|
81 #define FDT_ERR_BADPATH 5 |
|
82 /* FDT_ERR_BADPATH: Function was passed a badly formatted path |
|
83 * (e.g. missing a leading / for a function which requires an |
|
84 * absolute path) */ |
|
85 #define FDT_ERR_BADPHANDLE 6 |
|
86 /* FDT_ERR_BADPHANDLE: Function was passed an invalid phandle |
|
87 * value. phandle values of 0 and -1 are not permitted. */ |
|
88 #define FDT_ERR_BADSTATE 7 |
|
89 /* FDT_ERR_BADSTATE: Function was passed an incomplete device |
|
90 * tree created by the sequential-write functions, which is |
|
91 * not sufficiently complete for the requested operation. */ |
|
92 |
|
93 /* Error codes: codes for bad device tree blobs */ |
|
94 #define FDT_ERR_TRUNCATED 8 |
|
95 /* FDT_ERR_TRUNCATED: Structure block of the given device tree |
|
96 * ends without an FDT_END tag. */ |
|
97 #define FDT_ERR_BADMAGIC 9 |
|
98 /* FDT_ERR_BADMAGIC: Given "device tree" appears not to be a |
|
99 * device tree at all - it is missing the flattened device |
|
100 * tree magic number. */ |
|
101 #define FDT_ERR_BADVERSION 10 |
|
102 /* FDT_ERR_BADVERSION: Given device tree has a version which |
|
103 * can't be handled by the requested operation. For |
|
104 * read-write functions, this may mean that fdt_open_into() is |
|
105 * required to convert the tree to the expected version. */ |
|
106 #define FDT_ERR_BADSTRUCTURE 11 |
|
107 /* FDT_ERR_BADSTRUCTURE: Given device tree has a corrupt |
|
108 * structure block or other serious error (e.g. misnested |
|
109 * nodes, or subnodes preceding properties). */ |
|
110 #define FDT_ERR_BADLAYOUT 12 |
|
111 /* FDT_ERR_BADLAYOUT: For read-write functions, the given |
|
112 * device tree has it's sub-blocks in an order that the |
|
113 * function can't handle (memory reserve map, then structure, |
|
114 * then strings). Use fdt_open_into() to reorganize the tree |
|
115 * into a form suitable for the read-write operations. */ |
|
116 |
|
117 /* "Can't happen" error indicating a bug in libfdt */ |
|
118 #define FDT_ERR_INTERNAL 13 |
|
119 /* FDT_ERR_INTERNAL: libfdt has failed an internal assertion. |
|
120 * Should never be returned, if it is, it indicates a bug in |
|
121 * libfdt itself. */ |
|
122 |
|
123 #define FDT_ERR_MAX 13 |
|
124 |
|
125 /**********************************************************************/ |
|
126 /* Low-level functions (you probably don't need these) */ |
|
127 /**********************************************************************/ |
|
128 |
|
129 const void *fdt_offset_ptr(const void *fdt, int offset, int checklen); |
|
130 static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen) |
|
131 { |
|
132 return (void *)fdt_offset_ptr(fdt, offset, checklen); |
|
133 } |
|
134 |
|
135 uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset); |
|
136 |
|
137 /**********************************************************************/ |
|
138 /* General functions */ |
|
139 /**********************************************************************/ |
|
140 |
|
141 #define fdt_get_header(fdt, field) \ |
|
142 (fdt32_to_cpu(((const struct fdt_header *)(fdt))->field)) |
|
143 #define fdt_magic(fdt) (fdt_get_header(fdt, magic)) |
|
144 #define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize)) |
|
145 #define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct)) |
|
146 #define fdt_off_dt_strings(fdt) (fdt_get_header(fdt, off_dt_strings)) |
|
147 #define fdt_off_mem_rsvmap(fdt) (fdt_get_header(fdt, off_mem_rsvmap)) |
|
148 #define fdt_version(fdt) (fdt_get_header(fdt, version)) |
|
149 #define fdt_last_comp_version(fdt) (fdt_get_header(fdt, last_comp_version)) |
|
150 #define fdt_boot_cpuid_phys(fdt) (fdt_get_header(fdt, boot_cpuid_phys)) |
|
151 #define fdt_size_dt_strings(fdt) (fdt_get_header(fdt, size_dt_strings)) |
|
152 #define fdt_size_dt_struct(fdt) (fdt_get_header(fdt, size_dt_struct)) |
|
153 |
|
154 #define __fdt_set_hdr(name) \ |
|
155 static inline void fdt_set_##name(void *fdt, uint32_t val) \ |
|
156 { \ |
|
157 struct fdt_header *fdth = (struct fdt_header *)fdt; \ |
|
158 fdth->name = cpu_to_fdt32(val); \ |
|
159 } |
|
160 |
|
161 __fdt_set_hdr(magic); |
|
162 __fdt_set_hdr(totalsize); |
|
163 __fdt_set_hdr(off_dt_struct); |
|
164 __fdt_set_hdr(off_dt_strings); |
|
165 __fdt_set_hdr(off_mem_rsvmap); |
|
166 __fdt_set_hdr(version); |
|
167 __fdt_set_hdr(last_comp_version); |
|
168 __fdt_set_hdr(boot_cpuid_phys); |
|
169 __fdt_set_hdr(size_dt_strings); |
|
170 __fdt_set_hdr(size_dt_struct); |
|
171 #undef __fdt_set_hdr |
|
172 |
|
173 /** |
|
174 * fdt_check_header - sanity check a device tree or possible device tree |
|
175 * @fdt: pointer to data which might be a flattened device tree |
|
176 * |
|
177 * fdt_check_header() checks that the given buffer contains what |
|
178 * appears to be a flattened device tree with sane information in its |
|
179 * header. |
|
180 * |
|
181 * returns: |
|
182 * 0, if the buffer appears to contain a valid device tree |
|
183 * -FDT_ERR_BADMAGIC, |
|
184 * -FDT_ERR_BADVERSION, |
|
185 * -FDT_ERR_BADSTATE, standard meanings, as above |
|
186 */ |
|
187 int fdt_check_header(const void *fdt); |
|
188 |
|
189 /** |
|
190 * fdt_move - move a device tree around in memory |
|
191 * @fdt: pointer to the device tree to move |
|
192 * @buf: pointer to memory where the device is to be moved |
|
193 * @bufsize: size of the memory space at buf |
|
194 * |
|
195 * fdt_move() relocates, if possible, the device tree blob located at |
|
196 * fdt to the buffer at buf of size bufsize. The buffer may overlap |
|
197 * with the existing device tree blob at fdt. Therefore, |
|
198 * fdt_move(fdt, fdt, fdt_totalsize(fdt)) |
|
199 * should always succeed. |
|
200 * |
|
201 * returns: |
|
202 * 0, on success |
|
203 * -FDT_ERR_NOSPACE, bufsize is insufficient to contain the device tree |
|
204 * -FDT_ERR_BADMAGIC, |
|
205 * -FDT_ERR_BADVERSION, |
|
206 * -FDT_ERR_BADSTATE, standard meanings |
|
207 */ |
|
208 int fdt_move(const void *fdt, void *buf, int bufsize); |
|
209 |
|
210 /**********************************************************************/ |
|
211 /* Read-only functions */ |
|
212 /**********************************************************************/ |
|
213 |
|
214 /** |
|
215 * fdt_string - retreive a string from the strings block of a device tree |
|
216 * @fdt: pointer to the device tree blob |
|
217 * @stroffset: offset of the string within the strings block (native endian) |
|
218 * |
|
219 * fdt_string() retrieves a pointer to a single string from the |
|
220 * strings block of the device tree blob at fdt. |
|
221 * |
|
222 * returns: |
|
223 * a pointer to the string, on success |
|
224 * NULL, if stroffset is out of bounds |
|
225 */ |
|
226 const char *fdt_string(const void *fdt, int stroffset); |
|
227 |
|
228 /** |
|
229 * fdt_num_mem_rsv - retreive the number of memory reserve map entries |
|
230 * @fdt: pointer to the device tree blob |
|
231 * |
|
232 * Returns the number of entries in the device tree blob's memory |
|
233 * reservation map. This does not include the terminating 0,0 entry |
|
234 * or any other (0,0) entries reserved for expansion. |
|
235 * |
|
236 * returns: |
|
237 * the number of entries |
|
238 */ |
|
239 int fdt_num_mem_rsv(const void *fdt); |
|
240 |
|
241 /** |
|
242 * fdt_get_mem_rsv - retreive one memory reserve map entry |
|
243 * @fdt: pointer to the device tree blob |
|
244 * @address, @size: pointers to 64-bit variables |
|
245 * |
|
246 * On success, *address and *size will contain the address and size of |
|
247 * the n-th reserve map entry from the device tree blob, in |
|
248 * native-endian format. |
|
249 * |
|
250 * returns: |
|
251 * 0, on success |
|
252 * -FDT_ERR_BADMAGIC, |
|
253 * -FDT_ERR_BADVERSION, |
|
254 * -FDT_ERR_BADSTATE, standard meanings |
|
255 */ |
|
256 int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size); |
|
257 |
|
258 /** |
|
259 * fdt_subnode_offset_namelen - find a subnode based on substring |
|
260 * @fdt: pointer to the device tree blob |
|
261 * @parentoffset: structure block offset of a node |
|
262 * @name: name of the subnode to locate |
|
263 * @namelen: number of characters of name to consider |
|
264 * |
|
265 * Identical to fdt_subnode_offset(), but only examine the first |
|
266 * namelen characters of name for matching the subnode name. This is |
|
267 * useful for finding subnodes based on a portion of a larger string, |
|
268 * such as a full path. |
|
269 */ |
|
270 int fdt_subnode_offset_namelen(const void *fdt, int parentoffset, |
|
271 const char *name, int namelen); |
|
272 /** |
|
273 * fdt_subnode_offset - find a subnode of a given node |
|
274 * @fdt: pointer to the device tree blob |
|
275 * @parentoffset: structure block offset of a node |
|
276 * @name: name of the subnode to locate |
|
277 * |
|
278 * fdt_subnode_offset() finds a subnode of the node at structure block |
|
279 * offset parentoffset with the given name. name may include a unit |
|
280 * address, in which case fdt_subnode_offset() will find the subnode |
|
281 * with that unit address, or the unit address may be omitted, in |
|
282 * which case fdt_subnode_offset() will find an arbitrary subnode |
|
283 * whose name excluding unit address matches the given name. |
|
284 * |
|
285 * returns: |
|
286 * structure block offset of the requested subnode (>=0), on success |
|
287 * -FDT_ERR_NOTFOUND, if the requested subnode does not exist |
|
288 * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag |
|
289 * -FDT_ERR_BADMAGIC, |
|
290 * -FDT_ERR_BADVERSION, |
|
291 * -FDT_ERR_BADSTATE, |
|
292 * -FDT_ERR_BADSTRUCTURE, |
|
293 * -FDT_ERR_TRUNCATED, standard meanings. |
|
294 */ |
|
295 int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name); |
|
296 |
|
297 /** |
|
298 * fdt_path_offset - find a tree node by its full path |
|
299 * @fdt: pointer to the device tree blob |
|
300 * @path: full path of the node to locate |
|
301 * |
|
302 * fdt_path_offset() finds a node of a given path in the device tree. |
|
303 * Each path component may omit the unit address portion, but the |
|
304 * results of this are undefined if any such path component is |
|
305 * ambiguous (that is if there are multiple nodes at the relevant |
|
306 * level matching the given component, differentiated only by unit |
|
307 * address). |
|
308 * |
|
309 * returns: |
|
310 * structure block offset of the node with the requested path (>=0), on success |
|
311 * -FDT_ERR_BADPATH, given path does not begin with '/' or is invalid |
|
312 * -FDT_ERR_NOTFOUND, if the requested node does not exist |
|
313 * -FDT_ERR_BADMAGIC, |
|
314 * -FDT_ERR_BADVERSION, |
|
315 * -FDT_ERR_BADSTATE, |
|
316 * -FDT_ERR_BADSTRUCTURE, |
|
317 * -FDT_ERR_TRUNCATED, standard meanings. |
|
318 */ |
|
319 int fdt_path_offset(const void *fdt, const char *path); |
|
320 |
|
321 /** |
|
322 * fdt_get_name - retreive the name of a given node |
|
323 * @fdt: pointer to the device tree blob |
|
324 * @nodeoffset: structure block offset of the starting node |
|
325 * @lenp: pointer to an integer variable (will be overwritten) or NULL |
|
326 * |
|
327 * fdt_get_name() retrieves the name (including unit address) of the |
|
328 * device tree node at structure block offset nodeoffset. If lenp is |
|
329 * non-NULL, the length of this name is also returned, in the integer |
|
330 * pointed to by lenp. |
|
331 * |
|
332 * returns: |
|
333 * pointer to the node's name, on success |
|
334 * If lenp is non-NULL, *lenp contains the length of that name (>=0) |
|
335 * NULL, on error |
|
336 * if lenp is non-NULL *lenp contains an error code (<0): |
|
337 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
338 * -FDT_ERR_BADMAGIC, |
|
339 * -FDT_ERR_BADVERSION, |
|
340 * -FDT_ERR_BADSTATE, standard meanings |
|
341 */ |
|
342 const char *fdt_get_name(const void *fdt, int nodeoffset, int *lenp); |
|
343 |
|
344 /** |
|
345 * fdt_get_property - find a given property in a given node |
|
346 * @fdt: pointer to the device tree blob |
|
347 * @nodeoffset: offset of the node whose property to find |
|
348 * @name: name of the property to find |
|
349 * @lenp: pointer to an integer variable (will be overwritten) or NULL |
|
350 * |
|
351 * fdt_get_property() retrieves a pointer to the fdt_property |
|
352 * structure within the device tree blob corresponding to the property |
|
353 * named 'name' of the node at offset nodeoffset. If lenp is |
|
354 * non-NULL, the length of the property value also returned, in the |
|
355 * integer pointed to by lenp. |
|
356 * |
|
357 * returns: |
|
358 * pointer to the structure representing the property |
|
359 * if lenp is non-NULL, *lenp contains the length of the property |
|
360 * value (>=0) |
|
361 * NULL, on error |
|
362 * if lenp is non-NULL, *lenp contains an error code (<0): |
|
363 * -FDT_ERR_NOTFOUND, node does not have named property |
|
364 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
365 * -FDT_ERR_BADMAGIC, |
|
366 * -FDT_ERR_BADVERSION, |
|
367 * -FDT_ERR_BADSTATE, |
|
368 * -FDT_ERR_BADSTRUCTURE, |
|
369 * -FDT_ERR_TRUNCATED, standard meanings |
|
370 */ |
|
371 const struct fdt_property *fdt_get_property(const void *fdt, int nodeoffset, |
|
372 const char *name, int *lenp); |
|
373 static inline struct fdt_property *fdt_get_property_w(void *fdt, int nodeoffset, |
|
374 const char *name, |
|
375 int *lenp) |
|
376 { |
|
377 return (struct fdt_property *)fdt_get_property(fdt, nodeoffset, |
|
378 name, lenp); |
|
379 } |
|
380 |
|
381 /** |
|
382 * fdt_getprop - retrieve the value of a given property |
|
383 * @fdt: pointer to the device tree blob |
|
384 * @nodeoffset: offset of the node whose property to find |
|
385 * @name: name of the property to find |
|
386 * @lenp: pointer to an integer variable (will be overwritten) or NULL |
|
387 * |
|
388 * fdt_getprop() retrieves a pointer to the value of the property |
|
389 * named 'name' of the node at offset nodeoffset (this will be a |
|
390 * pointer to within the device blob itself, not a copy of the value). |
|
391 * If lenp is non-NULL, the length of the property value also |
|
392 * returned, in the integer pointed to by lenp. |
|
393 * |
|
394 * returns: |
|
395 * pointer to the property's value |
|
396 * if lenp is non-NULL, *lenp contains the length of the property |
|
397 * value (>=0) |
|
398 * NULL, on error |
|
399 * if lenp is non-NULL, *lenp contains an error code (<0): |
|
400 * -FDT_ERR_NOTFOUND, node does not have named property |
|
401 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
402 * -FDT_ERR_BADMAGIC, |
|
403 * -FDT_ERR_BADVERSION, |
|
404 * -FDT_ERR_BADSTATE, |
|
405 * -FDT_ERR_BADSTRUCTURE, |
|
406 * -FDT_ERR_TRUNCATED, standard meanings |
|
407 */ |
|
408 const void *fdt_getprop(const void *fdt, int nodeoffset, |
|
409 const char *name, int *lenp); |
|
410 static inline void *fdt_getprop_w(void *fdt, int nodeoffset, |
|
411 const char *name, int *lenp) |
|
412 { |
|
413 return (void *)fdt_getprop(fdt, nodeoffset, name, lenp); |
|
414 } |
|
415 |
|
416 /** |
|
417 * fdt_get_phandle - retreive the phandle of a given node |
|
418 * @fdt: pointer to the device tree blob |
|
419 * @nodeoffset: structure block offset of the node |
|
420 * |
|
421 * fdt_get_phandle() retrieves the phandle of the device tree node at |
|
422 * structure block offset nodeoffset. |
|
423 * |
|
424 * returns: |
|
425 * the phandle of the node at nodeoffset, on succes (!= 0, != -1) |
|
426 * 0, if the node has no phandle, or another error occurs |
|
427 */ |
|
428 uint32_t fdt_get_phandle(const void *fdt, int nodeoffset); |
|
429 |
|
430 /** |
|
431 * fdt_get_path - determine the full path of a node |
|
432 * @fdt: pointer to the device tree blob |
|
433 * @nodeoffset: offset of the node whose path to find |
|
434 * @buf: character buffer to contain the returned path (will be overwritten) |
|
435 * @buflen: size of the character buffer at buf |
|
436 * |
|
437 * fdt_get_path() computes the full path of the node at offset |
|
438 * nodeoffset, and records that path in the buffer at buf. |
|
439 * |
|
440 * NOTE: This function is expensive, as it must scan the device tree |
|
441 * structure from the start to nodeoffset. |
|
442 * |
|
443 * returns: |
|
444 * 0, on success |
|
445 * buf contains the absolute path of the node at |
|
446 * nodeoffset, as a NUL-terminated string. |
|
447 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag |
|
448 * -FDT_ERR_NOSPACE, the path of the given node is longer than (bufsize-1) |
|
449 * characters and will not fit in the given buffer. |
|
450 * -FDT_ERR_BADMAGIC, |
|
451 * -FDT_ERR_BADVERSION, |
|
452 * -FDT_ERR_BADSTATE, |
|
453 * -FDT_ERR_BADSTRUCTURE, standard meanings |
|
454 */ |
|
455 int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen); |
|
456 |
|
457 /** |
|
458 * fdt_supernode_atdepth_offset - find a specific ancestor of a node |
|
459 * @fdt: pointer to the device tree blob |
|
460 * @nodeoffset: offset of the node whose parent to find |
|
461 * @supernodedepth: depth of the ancestor to find |
|
462 * @nodedepth: pointer to an integer variable (will be overwritten) or NULL |
|
463 * |
|
464 * fdt_supernode_atdepth_offset() finds an ancestor of the given node |
|
465 * at a specific depth from the root (where the root itself has depth |
|
466 * 0, its immediate subnodes depth 1 and so forth). So |
|
467 * fdt_supernode_atdepth_offset(fdt, nodeoffset, 0, NULL); |
|
468 * will always return 0, the offset of the root node. If the node at |
|
469 * nodeoffset has depth D, then: |
|
470 * fdt_supernode_atdepth_offset(fdt, nodeoffset, D, NULL); |
|
471 * will return nodeoffset itself. |
|
472 * |
|
473 * NOTE: This function is expensive, as it must scan the device tree |
|
474 * structure from the start to nodeoffset. |
|
475 * |
|
476 * returns: |
|
477 |
|
478 * structure block offset of the node at node offset's ancestor |
|
479 * of depth supernodedepth (>=0), on success |
|
480 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag |
|
481 * -FDT_ERR_NOTFOUND, supernodedepth was greater than the depth of nodeoffset |
|
482 * -FDT_ERR_BADMAGIC, |
|
483 * -FDT_ERR_BADVERSION, |
|
484 * -FDT_ERR_BADSTATE, |
|
485 * -FDT_ERR_BADSTRUCTURE, standard meanings |
|
486 */ |
|
487 int fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset, |
|
488 int supernodedepth, int *nodedepth); |
|
489 |
|
490 /** |
|
491 * fdt_node_depth - find the depth of a given node |
|
492 * @fdt: pointer to the device tree blob |
|
493 * @nodeoffset: offset of the node whose parent to find |
|
494 * |
|
495 * fdt_node_depth() finds the depth of a given node. The root node |
|
496 * has depth 0, its immediate subnodes depth 1 and so forth. |
|
497 * |
|
498 * NOTE: This function is expensive, as it must scan the device tree |
|
499 * structure from the start to nodeoffset. |
|
500 * |
|
501 * returns: |
|
502 * depth of the node at nodeoffset (>=0), on success |
|
503 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag |
|
504 * -FDT_ERR_BADMAGIC, |
|
505 * -FDT_ERR_BADVERSION, |
|
506 * -FDT_ERR_BADSTATE, |
|
507 * -FDT_ERR_BADSTRUCTURE, standard meanings |
|
508 */ |
|
509 int fdt_node_depth(const void *fdt, int nodeoffset); |
|
510 |
|
511 /** |
|
512 * fdt_parent_offset - find the parent of a given node |
|
513 * @fdt: pointer to the device tree blob |
|
514 * @nodeoffset: offset of the node whose parent to find |
|
515 * |
|
516 * fdt_parent_offset() locates the parent node of a given node (that |
|
517 * is, it finds the offset of the node which contains the node at |
|
518 * nodeoffset as a subnode). |
|
519 * |
|
520 * NOTE: This function is expensive, as it must scan the device tree |
|
521 * structure from the start to nodeoffset, *twice*. |
|
522 * |
|
523 * returns: |
|
524 * stucture block offset of the parent of the node at nodeoffset |
|
525 * (>=0), on success |
|
526 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag |
|
527 * -FDT_ERR_BADMAGIC, |
|
528 * -FDT_ERR_BADVERSION, |
|
529 * -FDT_ERR_BADSTATE, |
|
530 * -FDT_ERR_BADSTRUCTURE, standard meanings |
|
531 */ |
|
532 int fdt_parent_offset(const void *fdt, int nodeoffset); |
|
533 |
|
534 /** |
|
535 * fdt_node_offset_by_prop_value - find nodes with a given property value |
|
536 * @fdt: pointer to the device tree blob |
|
537 * @startoffset: only find nodes after this offset |
|
538 * @propname: property name to check |
|
539 * @propval: property value to search for |
|
540 * @proplen: length of the value in propval |
|
541 * |
|
542 * fdt_node_offset_by_prop_value() returns the offset of the first |
|
543 * node after startoffset, which has a property named propname whose |
|
544 * value is of length proplen and has value equal to propval; or if |
|
545 * startoffset is -1, the very first such node in the tree. |
|
546 * |
|
547 * To iterate through all nodes matching the criterion, the following |
|
548 * idiom can be used: |
|
549 * offset = fdt_node_offset_by_prop_value(fdt, -1, propname, |
|
550 * propval, proplen); |
|
551 * while (offset != -FDT_ERR_NOTFOUND) { |
|
552 * // other code here |
|
553 * offset = fdt_node_offset_by_prop_value(fdt, offset, propname, |
|
554 * propval, proplen); |
|
555 * } |
|
556 * |
|
557 * Note the -1 in the first call to the function, if 0 is used here |
|
558 * instead, the function will never locate the root node, even if it |
|
559 * matches the criterion. |
|
560 * |
|
561 * returns: |
|
562 * structure block offset of the located node (>= 0, >startoffset), |
|
563 * on success |
|
564 * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the |
|
565 * tree after startoffset |
|
566 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag |
|
567 * -FDT_ERR_BADMAGIC, |
|
568 * -FDT_ERR_BADVERSION, |
|
569 * -FDT_ERR_BADSTATE, |
|
570 * -FDT_ERR_BADSTRUCTURE, standard meanings |
|
571 */ |
|
572 int fdt_node_offset_by_prop_value(const void *fdt, int startoffset, |
|
573 const char *propname, |
|
574 const void *propval, int proplen); |
|
575 |
|
576 /** |
|
577 * fdt_node_offset_by_phandle - find the node with a given phandle |
|
578 * @fdt: pointer to the device tree blob |
|
579 * @phandle: phandle value |
|
580 * |
|
581 * fdt_node_offset_by_prop_value() returns the offset of the node |
|
582 * which has the given phandle value. If there is more than one node |
|
583 * in the tree with the given phandle (an invalid tree), results are |
|
584 * undefined. |
|
585 * |
|
586 * returns: |
|
587 * structure block offset of the located node (>= 0), on success |
|
588 * -FDT_ERR_NOTFOUND, no node with that phandle exists |
|
589 * -FDT_ERR_BADPHANDLE, given phandle value was invalid (0 or -1) |
|
590 * -FDT_ERR_BADMAGIC, |
|
591 * -FDT_ERR_BADVERSION, |
|
592 * -FDT_ERR_BADSTATE, |
|
593 * -FDT_ERR_BADSTRUCTURE, standard meanings |
|
594 */ |
|
595 int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle); |
|
596 |
|
597 /** |
|
598 * fdt_node_check_compatible: check a node's compatible property |
|
599 * @fdt: pointer to the device tree blob |
|
600 * @nodeoffset: offset of a tree node |
|
601 * @compatible: string to match against |
|
602 * |
|
603 * |
|
604 * fdt_node_check_compatible() returns 0 if the given node contains a |
|
605 * 'compatible' property with the given string as one of its elements, |
|
606 * it returns non-zero otherwise, or on error. |
|
607 * |
|
608 * returns: |
|
609 * 0, if the node has a 'compatible' property listing the given string |
|
610 * 1, if the node has a 'compatible' property, but it does not list |
|
611 * the given string |
|
612 * -FDT_ERR_NOTFOUND, if the given node has no 'compatible' property |
|
613 * -FDT_ERR_BADOFFSET, if nodeoffset does not refer to a BEGIN_NODE tag |
|
614 * -FDT_ERR_BADMAGIC, |
|
615 * -FDT_ERR_BADVERSION, |
|
616 * -FDT_ERR_BADSTATE, |
|
617 * -FDT_ERR_BADSTRUCTURE, standard meanings |
|
618 */ |
|
619 int fdt_node_check_compatible(const void *fdt, int nodeoffset, |
|
620 const char *compatible); |
|
621 |
|
622 /** |
|
623 * fdt_node_offset_by_compatible - find nodes with a given 'compatible' value |
|
624 * @fdt: pointer to the device tree blob |
|
625 * @startoffset: only find nodes after this offset |
|
626 * @compatible: 'compatible' string to match against |
|
627 * |
|
628 * fdt_node_offset_by_compatible() returns the offset of the first |
|
629 * node after startoffset, which has a 'compatible' property which |
|
630 * lists the given compatible string; or if startoffset is -1, the |
|
631 * very first such node in the tree. |
|
632 * |
|
633 * To iterate through all nodes matching the criterion, the following |
|
634 * idiom can be used: |
|
635 * offset = fdt_node_offset_by_compatible(fdt, -1, compatible); |
|
636 * while (offset != -FDT_ERR_NOTFOUND) { |
|
637 * // other code here |
|
638 * offset = fdt_node_offset_by_compatible(fdt, offset, compatible); |
|
639 * } |
|
640 * |
|
641 * Note the -1 in the first call to the function, if 0 is used here |
|
642 * instead, the function will never locate the root node, even if it |
|
643 * matches the criterion. |
|
644 * |
|
645 * returns: |
|
646 * structure block offset of the located node (>= 0, >startoffset), |
|
647 * on success |
|
648 * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the |
|
649 * tree after startoffset |
|
650 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag |
|
651 * -FDT_ERR_BADMAGIC, |
|
652 * -FDT_ERR_BADVERSION, |
|
653 * -FDT_ERR_BADSTATE, |
|
654 * -FDT_ERR_BADSTRUCTURE, standard meanings |
|
655 */ |
|
656 int fdt_node_offset_by_compatible(const void *fdt, int startoffset, |
|
657 const char *compatible); |
|
658 |
|
659 /**********************************************************************/ |
|
660 /* Write-in-place functions */ |
|
661 /**********************************************************************/ |
|
662 |
|
663 /** |
|
664 * fdt_setprop_inplace - change a property's value, but not its size |
|
665 * @fdt: pointer to the device tree blob |
|
666 * @nodeoffset: offset of the node whose property to change |
|
667 * @name: name of the property to change |
|
668 * @val: pointer to data to replace the property value with |
|
669 * @len: length of the property value |
|
670 * |
|
671 * fdt_setprop_inplace() replaces the value of a given property with |
|
672 * the data in val, of length len. This function cannot change the |
|
673 * size of a property, and so will only work if len is equal to the |
|
674 * current length of the property. |
|
675 * |
|
676 * This function will alter only the bytes in the blob which contain |
|
677 * the given property value, and will not alter or move any other part |
|
678 * of the tree. |
|
679 * |
|
680 * returns: |
|
681 * 0, on success |
|
682 * -FDT_ERR_NOSPACE, if len is not equal to the property's current length |
|
683 * -FDT_ERR_NOTFOUND, node does not have the named property |
|
684 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
685 * -FDT_ERR_BADMAGIC, |
|
686 * -FDT_ERR_BADVERSION, |
|
687 * -FDT_ERR_BADSTATE, |
|
688 * -FDT_ERR_BADSTRUCTURE, |
|
689 * -FDT_ERR_TRUNCATED, standard meanings |
|
690 */ |
|
691 int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name, |
|
692 const void *val, int len); |
|
693 |
|
694 /** |
|
695 * fdt_setprop_inplace_cell - change the value of a single-cell property |
|
696 * @fdt: pointer to the device tree blob |
|
697 * @nodeoffset: offset of the node whose property to change |
|
698 * @name: name of the property to change |
|
699 * @val: cell (32-bit integer) value to replace the property with |
|
700 * |
|
701 * fdt_setprop_inplace_cell() replaces the value of a given property |
|
702 * with the 32-bit integer cell value in val, converting val to |
|
703 * big-endian if necessary. This function cannot change the size of a |
|
704 * property, and so will only work if the property already exists and |
|
705 * has length 4. |
|
706 * |
|
707 * This function will alter only the bytes in the blob which contain |
|
708 * the given property value, and will not alter or move any other part |
|
709 * of the tree. |
|
710 * |
|
711 * returns: |
|
712 * 0, on success |
|
713 * -FDT_ERR_NOSPACE, if the property's length is not equal to 4 |
|
714 * -FDT_ERR_NOTFOUND, node does not have the named property |
|
715 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
716 * -FDT_ERR_BADMAGIC, |
|
717 * -FDT_ERR_BADVERSION, |
|
718 * -FDT_ERR_BADSTATE, |
|
719 * -FDT_ERR_BADSTRUCTURE, |
|
720 * -FDT_ERR_TRUNCATED, standard meanings |
|
721 */ |
|
722 static inline int fdt_setprop_inplace_cell(void *fdt, int nodeoffset, |
|
723 const char *name, uint32_t val) |
|
724 { |
|
725 val = cpu_to_fdt32(val); |
|
726 return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val)); |
|
727 } |
|
728 |
|
729 /** |
|
730 * fdt_nop_property - replace a property with nop tags |
|
731 * @fdt: pointer to the device tree blob |
|
732 * @nodeoffset: offset of the node whose property to nop |
|
733 * @name: name of the property to nop |
|
734 * |
|
735 * fdt_nop_property() will replace a given property's representation |
|
736 * in the blob with FDT_NOP tags, effectively removing it from the |
|
737 * tree. |
|
738 * |
|
739 * This function will alter only the bytes in the blob which contain |
|
740 * the property, and will not alter or move any other part of the |
|
741 * tree. |
|
742 * |
|
743 * returns: |
|
744 * 0, on success |
|
745 * -FDT_ERR_NOTFOUND, node does not have the named property |
|
746 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
747 * -FDT_ERR_BADMAGIC, |
|
748 * -FDT_ERR_BADVERSION, |
|
749 * -FDT_ERR_BADSTATE, |
|
750 * -FDT_ERR_BADSTRUCTURE, |
|
751 * -FDT_ERR_TRUNCATED, standard meanings |
|
752 */ |
|
753 int fdt_nop_property(void *fdt, int nodeoffset, const char *name); |
|
754 |
|
755 /** |
|
756 * fdt_nop_node - replace a node (subtree) with nop tags |
|
757 * @fdt: pointer to the device tree blob |
|
758 * @nodeoffset: offset of the node to nop |
|
759 * |
|
760 * fdt_nop_node() will replace a given node's representation in the |
|
761 * blob, including all its subnodes, if any, with FDT_NOP tags, |
|
762 * effectively removing it from the tree. |
|
763 * |
|
764 * This function will alter only the bytes in the blob which contain |
|
765 * the node and its properties and subnodes, and will not alter or |
|
766 * move any other part of the tree. |
|
767 * |
|
768 * returns: |
|
769 * 0, on success |
|
770 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
771 * -FDT_ERR_BADMAGIC, |
|
772 * -FDT_ERR_BADVERSION, |
|
773 * -FDT_ERR_BADSTATE, |
|
774 * -FDT_ERR_BADSTRUCTURE, |
|
775 * -FDT_ERR_TRUNCATED, standard meanings |
|
776 */ |
|
777 int fdt_nop_node(void *fdt, int nodeoffset); |
|
778 |
|
779 /**********************************************************************/ |
|
780 /* Sequential write functions */ |
|
781 /**********************************************************************/ |
|
782 |
|
783 int fdt_create(void *buf, int bufsize); |
|
784 int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size); |
|
785 int fdt_finish_reservemap(void *fdt); |
|
786 int fdt_begin_node(void *fdt, const char *name); |
|
787 int fdt_property(void *fdt, const char *name, const void *val, int len); |
|
788 static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val) |
|
789 { |
|
790 val = cpu_to_fdt32(val); |
|
791 return fdt_property(fdt, name, &val, sizeof(val)); |
|
792 } |
|
793 #define fdt_property_string(fdt, name, str) \ |
|
794 fdt_property(fdt, name, str, strlen(str)+1) |
|
795 int fdt_end_node(void *fdt); |
|
796 int fdt_finish(void *fdt); |
|
797 |
|
798 /**********************************************************************/ |
|
799 /* Read-write functions */ |
|
800 /**********************************************************************/ |
|
801 |
|
802 int fdt_open_into(const void *fdt, void *buf, int bufsize); |
|
803 int fdt_pack(void *fdt); |
|
804 |
|
805 /** |
|
806 * fdt_add_mem_rsv - add one memory reserve map entry |
|
807 * @fdt: pointer to the device tree blob |
|
808 * @addres, @size: 64-bit values (native endian) |
|
809 * |
|
810 * Adds a reserve map entry to the given blob reserving a region at |
|
811 * address address of length size. |
|
812 * |
|
813 * This function will insert data into the reserve map and will |
|
814 * therfore change the indexes of some entries in the table. |
|
815 * |
|
816 * returns: |
|
817 * 0, on success |
|
818 * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to |
|
819 * contain the new reservation entry |
|
820 * -FDT_ERR_BADMAGIC, |
|
821 * -FDT_ERR_BADVERSION, |
|
822 * -FDT_ERR_BADSTATE, |
|
823 * -FDT_ERR_BADSTRUCTURE, |
|
824 * -FDT_ERR_BADLAYOUT, |
|
825 * -FDT_ERR_TRUNCATED, standard meanings |
|
826 */ |
|
827 int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size); |
|
828 |
|
829 /** |
|
830 * fdt_del_mem_rsv - remove a memory reserve map entry |
|
831 * @fdt: pointer to the device tree blob |
|
832 * @n: entry to remove |
|
833 * |
|
834 * fdt_del_mem_rsv() removes the n-th memory reserve map entry from |
|
835 * the blob. |
|
836 * |
|
837 * This function will delete data from the reservation table and will |
|
838 * therfore change the indexes of some entries in the table. |
|
839 * |
|
840 * returns: |
|
841 * 0, on success |
|
842 * -FDT_ERR_NOTFOUND, there is no entry of the given index (i.e. there |
|
843 * are less than n+1 reserve map entries) |
|
844 * -FDT_ERR_BADMAGIC, |
|
845 * -FDT_ERR_BADVERSION, |
|
846 * -FDT_ERR_BADSTATE, |
|
847 * -FDT_ERR_BADSTRUCTURE, |
|
848 * -FDT_ERR_BADLAYOUT, |
|
849 * -FDT_ERR_TRUNCATED, standard meanings |
|
850 */ |
|
851 int fdt_del_mem_rsv(void *fdt, int n); |
|
852 |
|
853 /** |
|
854 * fdt_set_name - change the name of a given node |
|
855 * @fdt: pointer to the device tree blob |
|
856 * @nodeoffset: structure block offset of a node |
|
857 * @name: name to give the node |
|
858 * |
|
859 * fdt_set_name() replaces the name (including unit address, if any) |
|
860 * of the given node with the given string. NOTE: this function can't |
|
861 * efficiently check if the new name is unique amongst the given |
|
862 * node's siblings; results are undefined if this function is invoked |
|
863 * with a name equal to one of the given node's siblings. |
|
864 * |
|
865 * This function may insert or delete data from the blob, and will |
|
866 * therefore change the offsets of some existing nodes. |
|
867 * |
|
868 * returns: |
|
869 * 0, on success |
|
870 * -FDT_ERR_NOSPACE, there is insufficient free space in the blob |
|
871 * to contain the new name |
|
872 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
873 * -FDT_ERR_BADMAGIC, |
|
874 * -FDT_ERR_BADVERSION, |
|
875 * -FDT_ERR_BADSTATE, standard meanings |
|
876 */ |
|
877 int fdt_set_name(void *fdt, int nodeoffset, const char *name); |
|
878 |
|
879 /** |
|
880 * fdt_setprop - create or change a property |
|
881 * @fdt: pointer to the device tree blob |
|
882 * @nodeoffset: offset of the node whose property to change |
|
883 * @name: name of the property to change |
|
884 * @val: pointer to data to set the property value to |
|
885 * @len: length of the property value |
|
886 * |
|
887 * fdt_setprop() sets the value of the named property in the given |
|
888 * node to the given value and length, creeating the property if it |
|
889 * does not already exist. |
|
890 * |
|
891 * This function may insert or delete data from the blob, and will |
|
892 * therefore change the offsets of some existing nodes. |
|
893 * |
|
894 * returns: |
|
895 * 0, on success |
|
896 * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to |
|
897 * contain the new property value |
|
898 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
899 * -FDT_ERR_BADLAYOUT, |
|
900 * -FDT_ERR_BADMAGIC, |
|
901 * -FDT_ERR_BADVERSION, |
|
902 * -FDT_ERR_BADSTATE, |
|
903 * -FDT_ERR_BADSTRUCTURE, |
|
904 * -FDT_ERR_BADLAYOUT, |
|
905 * -FDT_ERR_TRUNCATED, standard meanings |
|
906 */ |
|
907 int fdt_setprop(void *fdt, int nodeoffset, const char *name, |
|
908 const void *val, int len); |
|
909 |
|
910 /** |
|
911 * fdt_setprop_cell - set a property to a single cell value |
|
912 * @fdt: pointer to the device tree blob |
|
913 * @nodeoffset: offset of the node whose property to change |
|
914 * @name: name of the property to change |
|
915 * @val: 32-bit integer value for the property (native endian) |
|
916 * |
|
917 * fdt_setprop_cell() sets the value of the named property in the |
|
918 * given node to the given cell value (converting to big-endian if |
|
919 * necessary), or creates a new property with that value if it does |
|
920 * not already exist. |
|
921 * |
|
922 * This function may insert or delete data from the blob, and will |
|
923 * therefore change the offsets of some existing nodes. |
|
924 * |
|
925 * returns: |
|
926 * 0, on success |
|
927 * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to |
|
928 * contain the new property value |
|
929 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
930 * -FDT_ERR_BADLAYOUT, |
|
931 * -FDT_ERR_BADMAGIC, |
|
932 * -FDT_ERR_BADVERSION, |
|
933 * -FDT_ERR_BADSTATE, |
|
934 * -FDT_ERR_BADSTRUCTURE, |
|
935 * -FDT_ERR_BADLAYOUT, |
|
936 * -FDT_ERR_TRUNCATED, standard meanings |
|
937 */ |
|
938 static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name, |
|
939 uint32_t val) |
|
940 { |
|
941 val = cpu_to_fdt32(val); |
|
942 return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val)); |
|
943 } |
|
944 |
|
945 /** |
|
946 * fdt_setprop_string - set a property to a string value |
|
947 * @fdt: pointer to the device tree blob |
|
948 * @nodeoffset: offset of the node whose property to change |
|
949 * @name: name of the property to change |
|
950 * @str: string value for the property |
|
951 * |
|
952 * fdt_setprop_string() sets the value of the named property in the |
|
953 * given node to the given string value (using the length of the |
|
954 * string to determine the new length of the property), or creates a |
|
955 * new property with that value if it does not already exist. |
|
956 * |
|
957 * This function may insert or delete data from the blob, and will |
|
958 * therefore change the offsets of some existing nodes. |
|
959 * |
|
960 * returns: |
|
961 * 0, on success |
|
962 * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to |
|
963 * contain the new property value |
|
964 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
965 * -FDT_ERR_BADLAYOUT, |
|
966 * -FDT_ERR_BADMAGIC, |
|
967 * -FDT_ERR_BADVERSION, |
|
968 * -FDT_ERR_BADSTATE, |
|
969 * -FDT_ERR_BADSTRUCTURE, |
|
970 * -FDT_ERR_BADLAYOUT, |
|
971 * -FDT_ERR_TRUNCATED, standard meanings |
|
972 */ |
|
973 #define fdt_setprop_string(fdt, nodeoffset, name, str) \ |
|
974 fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1) |
|
975 |
|
976 /** |
|
977 * fdt_delprop - delete a property |
|
978 * @fdt: pointer to the device tree blob |
|
979 * @nodeoffset: offset of the node whose property to nop |
|
980 * @name: name of the property to nop |
|
981 * |
|
982 * fdt_del_property() will delete the given property. |
|
983 * |
|
984 * This function will delete data from the blob, and will therefore |
|
985 * change the offsets of some existing nodes. |
|
986 * |
|
987 * returns: |
|
988 * 0, on success |
|
989 * -FDT_ERR_NOTFOUND, node does not have the named property |
|
990 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
991 * -FDT_ERR_BADLAYOUT, |
|
992 * -FDT_ERR_BADMAGIC, |
|
993 * -FDT_ERR_BADVERSION, |
|
994 * -FDT_ERR_BADSTATE, |
|
995 * -FDT_ERR_BADSTRUCTURE, |
|
996 * -FDT_ERR_TRUNCATED, standard meanings |
|
997 */ |
|
998 int fdt_delprop(void *fdt, int nodeoffset, const char *name); |
|
999 |
|
1000 /** |
|
1001 * fdt_add_subnode_namelen - creates a new node based on substring |
|
1002 * @fdt: pointer to the device tree blob |
|
1003 * @parentoffset: structure block offset of a node |
|
1004 * @name: name of the subnode to locate |
|
1005 * @namelen: number of characters of name to consider |
|
1006 * |
|
1007 * Identical to fdt_add_subnode(), but use only the first namelen |
|
1008 * characters of name as the name of the new node. This is useful for |
|
1009 * creating subnodes based on a portion of a larger string, such as a |
|
1010 * full path. |
|
1011 */ |
|
1012 int fdt_add_subnode_namelen(void *fdt, int parentoffset, |
|
1013 const char *name, int namelen); |
|
1014 |
|
1015 /** |
|
1016 * fdt_add_subnode - creates a new node |
|
1017 * @fdt: pointer to the device tree blob |
|
1018 * @parentoffset: structure block offset of a node |
|
1019 * @name: name of the subnode to locate |
|
1020 * |
|
1021 * fdt_add_subnode() creates a new node as a subnode of the node at |
|
1022 * structure block offset parentoffset, with the given name (which |
|
1023 * should include the unit address, if any). |
|
1024 * |
|
1025 * This function will insert data into the blob, and will therefore |
|
1026 * change the offsets of some existing nodes. |
|
1027 |
|
1028 * returns: |
|
1029 * structure block offset of the created nodeequested subnode (>=0), on success |
|
1030 * -FDT_ERR_NOTFOUND, if the requested subnode does not exist |
|
1031 * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag |
|
1032 * -FDT_ERR_EXISTS, if the node at parentoffset already has a subnode of |
|
1033 * the given name |
|
1034 * -FDT_ERR_NOSPACE, if there is insufficient free space in the |
|
1035 * blob to contain the new node |
|
1036 * -FDT_ERR_NOSPACE |
|
1037 * -FDT_ERR_BADLAYOUT |
|
1038 * -FDT_ERR_BADMAGIC, |
|
1039 * -FDT_ERR_BADVERSION, |
|
1040 * -FDT_ERR_BADSTATE, |
|
1041 * -FDT_ERR_BADSTRUCTURE, |
|
1042 * -FDT_ERR_TRUNCATED, standard meanings. |
|
1043 */ |
|
1044 int fdt_add_subnode(void *fdt, int parentoffset, const char *name); |
|
1045 |
|
1046 /** |
|
1047 * fdt_del_node - delete a node (subtree) |
|
1048 * @fdt: pointer to the device tree blob |
|
1049 * @nodeoffset: offset of the node to nop |
|
1050 * |
|
1051 * fdt_del_node() will remove the given node, including all its |
|
1052 * subnodes if any, from the blob. |
|
1053 * |
|
1054 * This function will delete data from the blob, and will therefore |
|
1055 * change the offsets of some existing nodes. |
|
1056 * |
|
1057 * returns: |
|
1058 * 0, on success |
|
1059 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag |
|
1060 * -FDT_ERR_BADLAYOUT, |
|
1061 * -FDT_ERR_BADMAGIC, |
|
1062 * -FDT_ERR_BADVERSION, |
|
1063 * -FDT_ERR_BADSTATE, |
|
1064 * -FDT_ERR_BADSTRUCTURE, |
|
1065 * -FDT_ERR_TRUNCATED, standard meanings |
|
1066 */ |
|
1067 int fdt_del_node(void *fdt, int nodeoffset); |
|
1068 |
|
1069 /**********************************************************************/ |
|
1070 /* Debugging / informational functions */ |
|
1071 /**********************************************************************/ |
|
1072 |
|
1073 const char *fdt_strerror(int errval); |
|
1074 |
|
1075 #ifdef __cplusplus |
|
1076 } |
|
1077 #endif |
|
1078 |
|
1079 |
|
1080 #endif /* _LIBFDT_H */ |
|