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1e57a462 | 1 | #ifndef _LIBFDT_H\r |
2 | #define _LIBFDT_H\r | |
3 | /*\r | |
4 | * libfdt - Flat Device Tree manipulation\r | |
5 | * Copyright (C) 2006 David Gibson, IBM Corporation.\r | |
6 | *\r | |
7 | * libfdt is dual licensed: you can use it either under the terms of\r | |
8 | * the GPL, or the BSD license, at your option.\r | |
9 | *\r | |
10 | * a) This library is free software; you can redistribute it and/or\r | |
11 | * modify it under the terms of the GNU General Public License as\r | |
12 | * published by the Free Software Foundation; either version 2 of the\r | |
13 | * License, or (at your option) any later version.\r | |
14 | *\r | |
15 | * This library is distributed in the hope that it will be useful,\r | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r | |
18 | * GNU General Public License for more details.\r | |
19 | *\r | |
20 | * You should have received a copy of the GNU General Public\r | |
21 | * License along with this library; if not, write to the Free\r | |
22 | * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,\r | |
23 | * MA 02110-1301 USA\r | |
24 | *\r | |
25 | * Alternatively,\r | |
26 | *\r | |
27 | * b) Redistribution and use in source and binary forms, with or\r | |
28 | * without modification, are permitted provided that the following\r | |
29 | * conditions are met:\r | |
30 | *\r | |
31 | * 1. Redistributions of source code must retain the above\r | |
32 | * copyright notice, this list of conditions and the following\r | |
33 | * disclaimer.\r | |
34 | * 2. Redistributions in binary form must reproduce the above\r | |
35 | * copyright notice, this list of conditions and the following\r | |
36 | * disclaimer in the documentation and/or other materials\r | |
37 | * provided with the distribution.\r | |
38 | *\r | |
39 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND\r | |
40 | * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,\r | |
41 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF\r | |
42 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\r | |
43 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR\r | |
44 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\r | |
45 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT\r | |
46 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\r | |
47 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r | |
49 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR\r | |
50 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,\r | |
51 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r | |
52 | */\r | |
53 | \r | |
54 | #include <libfdt_env.h>\r | |
55 | #include <fdt.h>\r | |
56 | \r | |
57 | #define FDT_FIRST_SUPPORTED_VERSION 0x10\r | |
58 | #define FDT_LAST_SUPPORTED_VERSION 0x11\r | |
59 | \r | |
60 | /* Error codes: informative error codes */\r | |
61 | #define FDT_ERR_NOTFOUND 1\r | |
62 | /* FDT_ERR_NOTFOUND: The requested node or property does not exist */\r | |
63 | #define FDT_ERR_EXISTS 2\r | |
64 | /* FDT_ERR_EXISTS: Attemped to create a node or property which\r | |
65 | * already exists */\r | |
66 | #define FDT_ERR_NOSPACE 3\r | |
67 | /* FDT_ERR_NOSPACE: Operation needed to expand the device\r | |
68 | * tree, but its buffer did not have sufficient space to\r | |
69 | * contain the expanded tree. Use fdt_open_into() to move the\r | |
70 | * device tree to a buffer with more space. */\r | |
71 | \r | |
72 | /* Error codes: codes for bad parameters */\r | |
73 | #define FDT_ERR_BADOFFSET 4\r | |
74 | /* FDT_ERR_BADOFFSET: Function was passed a structure block\r | |
75 | * offset which is out-of-bounds, or which points to an\r | |
76 | * unsuitable part of the structure for the operation. */\r | |
77 | #define FDT_ERR_BADPATH 5\r | |
78 | /* FDT_ERR_BADPATH: Function was passed a badly formatted path\r | |
79 | * (e.g. missing a leading / for a function which requires an\r | |
80 | * absolute path) */\r | |
81 | #define FDT_ERR_BADPHANDLE 6\r | |
82 | /* FDT_ERR_BADPHANDLE: Function was passed an invalid phandle\r | |
83 | * value. phandle values of 0 and -1 are not permitted. */\r | |
84 | #define FDT_ERR_BADSTATE 7\r | |
85 | /* FDT_ERR_BADSTATE: Function was passed an incomplete device\r | |
86 | * tree created by the sequential-write functions, which is\r | |
87 | * not sufficiently complete for the requested operation. */\r | |
88 | \r | |
89 | /* Error codes: codes for bad device tree blobs */\r | |
90 | #define FDT_ERR_TRUNCATED 8\r | |
91 | /* FDT_ERR_TRUNCATED: Structure block of the given device tree\r | |
92 | * ends without an FDT_END tag. */\r | |
93 | #define FDT_ERR_BADMAGIC 9\r | |
94 | /* FDT_ERR_BADMAGIC: Given "device tree" appears not to be a\r | |
95 | * device tree at all - it is missing the flattened device\r | |
96 | * tree magic number. */\r | |
97 | #define FDT_ERR_BADVERSION 10\r | |
98 | /* FDT_ERR_BADVERSION: Given device tree has a version which\r | |
99 | * can't be handled by the requested operation. For\r | |
100 | * read-write functions, this may mean that fdt_open_into() is\r | |
101 | * required to convert the tree to the expected version. */\r | |
102 | #define FDT_ERR_BADSTRUCTURE 11\r | |
103 | /* FDT_ERR_BADSTRUCTURE: Given device tree has a corrupt\r | |
104 | * structure block or other serious error (e.g. misnested\r | |
105 | * nodes, or subnodes preceding properties). */\r | |
106 | #define FDT_ERR_BADLAYOUT 12\r | |
107 | /* FDT_ERR_BADLAYOUT: For read-write functions, the given\r | |
108 | * device tree has it's sub-blocks in an order that the\r | |
109 | * function can't handle (memory reserve map, then structure,\r | |
110 | * then strings). Use fdt_open_into() to reorganize the tree\r | |
111 | * into a form suitable for the read-write operations. */\r | |
112 | \r | |
113 | /* "Can't happen" error indicating a bug in libfdt */\r | |
114 | #define FDT_ERR_INTERNAL 13\r | |
115 | /* FDT_ERR_INTERNAL: libfdt has failed an internal assertion.\r | |
116 | * Should never be returned, if it is, it indicates a bug in\r | |
117 | * libfdt itself. */\r | |
118 | \r | |
119 | #define FDT_ERR_MAX 13\r | |
120 | \r | |
121 | /**********************************************************************/\r | |
122 | /* Low-level functions (you probably don't need these) */\r | |
123 | /**********************************************************************/\r | |
124 | \r | |
125 | const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen);\r | |
126 | static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen)\r | |
127 | {\r | |
128 | return (void *)(uintptr_t)fdt_offset_ptr(fdt, offset, checklen);\r | |
129 | }\r | |
130 | \r | |
131 | uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset);\r | |
132 | \r | |
133 | /**********************************************************************/\r | |
134 | /* Traversal functions */\r | |
135 | /**********************************************************************/\r | |
136 | \r | |
137 | int fdt_next_node(const void *fdt, int offset, int *depth);\r | |
138 | \r | |
139 | /**********************************************************************/\r | |
140 | /* General functions */\r | |
141 | /**********************************************************************/\r | |
142 | \r | |
143 | #define fdt_get_header(fdt, field) \\r | |
144 | (fdt32_to_cpu(((const struct fdt_header *)(fdt))->field))\r | |
145 | #define fdt_magic(fdt) (fdt_get_header(fdt, magic))\r | |
146 | #define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize))\r | |
147 | #define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct))\r | |
148 | #define fdt_off_dt_strings(fdt) (fdt_get_header(fdt, off_dt_strings))\r | |
149 | #define fdt_off_mem_rsvmap(fdt) (fdt_get_header(fdt, off_mem_rsvmap))\r | |
150 | #define fdt_version(fdt) (fdt_get_header(fdt, version))\r | |
151 | #define fdt_last_comp_version(fdt) (fdt_get_header(fdt, last_comp_version))\r | |
152 | #define fdt_boot_cpuid_phys(fdt) (fdt_get_header(fdt, boot_cpuid_phys))\r | |
153 | #define fdt_size_dt_strings(fdt) (fdt_get_header(fdt, size_dt_strings))\r | |
154 | #define fdt_size_dt_struct(fdt) (fdt_get_header(fdt, size_dt_struct))\r | |
155 | \r | |
156 | #define __fdt_set_hdr(name) \\r | |
157 | static inline void fdt_set_##name(void *fdt, uint32_t val) \\r | |
158 | { \\r | |
159 | struct fdt_header *fdth = (struct fdt_header*)fdt; \\r | |
160 | fdth->name = cpu_to_fdt32(val); \\r | |
161 | }\r | |
162 | __fdt_set_hdr(magic);\r | |
163 | __fdt_set_hdr(totalsize);\r | |
164 | __fdt_set_hdr(off_dt_struct);\r | |
165 | __fdt_set_hdr(off_dt_strings);\r | |
166 | __fdt_set_hdr(off_mem_rsvmap);\r | |
167 | __fdt_set_hdr(version);\r | |
168 | __fdt_set_hdr(last_comp_version);\r | |
169 | __fdt_set_hdr(boot_cpuid_phys);\r | |
170 | __fdt_set_hdr(size_dt_strings);\r | |
171 | __fdt_set_hdr(size_dt_struct);\r | |
172 | #undef __fdt_set_hdr\r | |
173 | \r | |
174 | /**\r | |
175 | * fdt_check_header - sanity check a device tree or possible device tree\r | |
176 | * @fdt: pointer to data which might be a flattened device tree\r | |
177 | *\r | |
178 | * fdt_check_header() checks that the given buffer contains what\r | |
179 | * appears to be a flattened device tree with sane information in its\r | |
180 | * header.\r | |
181 | *\r | |
182 | * returns:\r | |
183 | * 0, if the buffer appears to contain a valid device tree\r | |
184 | * -FDT_ERR_BADMAGIC,\r | |
185 | * -FDT_ERR_BADVERSION,\r | |
186 | * -FDT_ERR_BADSTATE, standard meanings, as above\r | |
187 | */\r | |
188 | int fdt_check_header(const void *fdt);\r | |
189 | \r | |
190 | /**\r | |
191 | * fdt_move - move a device tree around in memory\r | |
192 | * @fdt: pointer to the device tree to move\r | |
193 | * @buf: pointer to memory where the device is to be moved\r | |
194 | * @bufsize: size of the memory space at buf\r | |
195 | *\r | |
196 | * fdt_move() relocates, if possible, the device tree blob located at\r | |
197 | * fdt to the buffer at buf of size bufsize. The buffer may overlap\r | |
198 | * with the existing device tree blob at fdt. Therefore,\r | |
199 | * fdt_move(fdt, fdt, fdt_totalsize(fdt))\r | |
200 | * should always succeed.\r | |
201 | *\r | |
202 | * returns:\r | |
203 | * 0, on success\r | |
204 | * -FDT_ERR_NOSPACE, bufsize is insufficient to contain the device tree\r | |
205 | * -FDT_ERR_BADMAGIC,\r | |
206 | * -FDT_ERR_BADVERSION,\r | |
207 | * -FDT_ERR_BADSTATE, standard meanings\r | |
208 | */\r | |
209 | int fdt_move(const void *fdt, void *buf, int bufsize);\r | |
210 | \r | |
211 | /**********************************************************************/\r | |
212 | /* Read-only functions */\r | |
213 | /**********************************************************************/\r | |
214 | \r | |
215 | /**\r | |
216 | * fdt_string - retrieve a string from the strings block of a device tree\r | |
217 | * @fdt: pointer to the device tree blob\r | |
218 | * @stroffset: offset of the string within the strings block (native endian)\r | |
219 | *\r | |
220 | * fdt_string() retrieves a pointer to a single string from the\r | |
221 | * strings block of the device tree blob at fdt.\r | |
222 | *\r | |
223 | * returns:\r | |
224 | * a pointer to the string, on success\r | |
225 | * NULL, if stroffset is out of bounds\r | |
226 | */\r | |
227 | const char *fdt_string(const void *fdt, int stroffset);\r | |
228 | \r | |
229 | /**\r | |
230 | * fdt_num_mem_rsv - retrieve the number of memory reserve map entries\r | |
231 | * @fdt: pointer to the device tree blob\r | |
232 | *\r | |
233 | * Returns the number of entries in the device tree blob's memory\r | |
234 | * reservation map. This does not include the terminating 0,0 entry\r | |
235 | * or any other (0,0) entries reserved for expansion.\r | |
236 | *\r | |
237 | * returns:\r | |
238 | * the number of entries\r | |
239 | */\r | |
240 | int fdt_num_mem_rsv(const void *fdt);\r | |
241 | \r | |
242 | /**\r | |
243 | * fdt_get_mem_rsv - retrieve one memory reserve map entry\r | |
244 | * @fdt: pointer to the device tree blob\r | |
245 | * @address, @size: pointers to 64-bit variables\r | |
246 | *\r | |
247 | * On success, *address and *size will contain the address and size of\r | |
248 | * the n-th reserve map entry from the device tree blob, in\r | |
249 | * native-endian format.\r | |
250 | *\r | |
251 | * returns:\r | |
252 | * 0, on success\r | |
253 | * -FDT_ERR_BADMAGIC,\r | |
254 | * -FDT_ERR_BADVERSION,\r | |
255 | * -FDT_ERR_BADSTATE, standard meanings\r | |
256 | */\r | |
257 | int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size);\r | |
258 | \r | |
259 | /**\r | |
260 | * fdt_subnode_offset_namelen - find a subnode based on substring\r | |
261 | * @fdt: pointer to the device tree blob\r | |
262 | * @parentoffset: structure block offset of a node\r | |
263 | * @name: name of the subnode to locate\r | |
264 | * @namelen: number of characters of name to consider\r | |
265 | *\r | |
266 | * Identical to fdt_subnode_offset(), but only examine the first\r | |
267 | * namelen characters of name for matching the subnode name. This is\r | |
268 | * useful for finding subnodes based on a portion of a larger string,\r | |
269 | * such as a full path.\r | |
270 | */\r | |
271 | int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,\r | |
272 | const char *name, int namelen);\r | |
273 | /**\r | |
274 | * fdt_subnode_offset - find a subnode of a given node\r | |
275 | * @fdt: pointer to the device tree blob\r | |
276 | * @parentoffset: structure block offset of a node\r | |
277 | * @name: name of the subnode to locate\r | |
278 | *\r | |
279 | * fdt_subnode_offset() finds a subnode of the node at structure block\r | |
280 | * offset parentoffset with the given name. name may include a unit\r | |
281 | * address, in which case fdt_subnode_offset() will find the subnode\r | |
282 | * with that unit address, or the unit address may be omitted, in\r | |
283 | * which case fdt_subnode_offset() will find an arbitrary subnode\r | |
284 | * whose name excluding unit address matches the given name.\r | |
285 | *\r | |
286 | * returns:\r | |
287 | * structure block offset of the requested subnode (>=0), on success\r | |
288 | * -FDT_ERR_NOTFOUND, if the requested subnode does not exist\r | |
289 | * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag\r | |
290 | * -FDT_ERR_BADMAGIC,\r | |
291 | * -FDT_ERR_BADVERSION,\r | |
292 | * -FDT_ERR_BADSTATE,\r | |
293 | * -FDT_ERR_BADSTRUCTURE,\r | |
294 | * -FDT_ERR_TRUNCATED, standard meanings.\r | |
295 | */\r | |
296 | int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name);\r | |
297 | \r | |
298 | /**\r | |
299 | * fdt_path_offset - find a tree node by its full path\r | |
300 | * @fdt: pointer to the device tree blob\r | |
301 | * @path: full path of the node to locate\r | |
302 | *\r | |
303 | * fdt_path_offset() finds a node of a given path in the device tree.\r | |
304 | * Each path component may omit the unit address portion, but the\r | |
305 | * results of this are undefined if any such path component is\r | |
306 | * ambiguous (that is if there are multiple nodes at the relevant\r | |
307 | * level matching the given component, differentiated only by unit\r | |
308 | * address).\r | |
309 | *\r | |
310 | * returns:\r | |
311 | * structure block offset of the node with the requested path (>=0), on success\r | |
312 | * -FDT_ERR_BADPATH, given path does not begin with '/' or is invalid\r | |
313 | * -FDT_ERR_NOTFOUND, if the requested node does not exist\r | |
314 | * -FDT_ERR_BADMAGIC,\r | |
315 | * -FDT_ERR_BADVERSION,\r | |
316 | * -FDT_ERR_BADSTATE,\r | |
317 | * -FDT_ERR_BADSTRUCTURE,\r | |
318 | * -FDT_ERR_TRUNCATED, standard meanings.\r | |
319 | */\r | |
320 | int fdt_path_offset(const void *fdt, const char *path);\r | |
321 | \r | |
322 | /**\r | |
323 | * fdt_get_name - retrieve the name of a given node\r | |
324 | * @fdt: pointer to the device tree blob\r | |
325 | * @nodeoffset: structure block offset of the starting node\r | |
326 | * @lenp: pointer to an integer variable (will be overwritten) or NULL\r | |
327 | *\r | |
328 | * fdt_get_name() retrieves the name (including unit address) of the\r | |
329 | * device tree node at structure block offset nodeoffset. If lenp is\r | |
330 | * non-NULL, the length of this name is also returned, in the integer\r | |
331 | * pointed to by lenp.\r | |
332 | *\r | |
333 | * returns:\r | |
334 | * pointer to the node's name, on success\r | |
335 | * If lenp is non-NULL, *lenp contains the length of that name (>=0)\r | |
336 | * NULL, on error\r | |
337 | * if lenp is non-NULL *lenp contains an error code (<0):\r | |
338 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
339 | * -FDT_ERR_BADMAGIC,\r | |
340 | * -FDT_ERR_BADVERSION,\r | |
341 | * -FDT_ERR_BADSTATE, standard meanings\r | |
342 | */\r | |
343 | const char *fdt_get_name(const void *fdt, int nodeoffset, int *lenp);\r | |
344 | \r | |
345 | /**\r | |
346 | * fdt_first_property_offset - find the offset of a node's first property\r | |
347 | * @fdt: pointer to the device tree blob\r | |
348 | * @nodeoffset: structure block offset of a node\r | |
349 | *\r | |
350 | * fdt_first_property_offset() finds the first property of the node at\r | |
351 | * the given structure block offset.\r | |
352 | *\r | |
353 | * returns:\r | |
354 | * structure block offset of the property (>=0), on success\r | |
355 | * -FDT_ERR_NOTFOUND, if the requested node has no properties\r | |
356 | * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_BEGIN_NODE tag\r | |
357 | * -FDT_ERR_BADMAGIC,\r | |
358 | * -FDT_ERR_BADVERSION,\r | |
359 | * -FDT_ERR_BADSTATE,\r | |
360 | * -FDT_ERR_BADSTRUCTURE,\r | |
361 | * -FDT_ERR_TRUNCATED, standard meanings.\r | |
362 | */\r | |
363 | int fdt_first_property_offset(const void *fdt, int nodeoffset);\r | |
364 | \r | |
365 | /**\r | |
366 | * fdt_next_property_offset - step through a node's properties\r | |
367 | * @fdt: pointer to the device tree blob\r | |
368 | * @offset: structure block offset of a property\r | |
369 | *\r | |
370 | * fdt_next_property_offset() finds the property immediately after the\r | |
371 | * one at the given structure block offset. This will be a property\r | |
372 | * of the same node as the given property.\r | |
373 | *\r | |
374 | * returns:\r | |
375 | * structure block offset of the next property (>=0), on success\r | |
376 | * -FDT_ERR_NOTFOUND, if the given property is the last in its node\r | |
377 | * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_PROP tag\r | |
378 | * -FDT_ERR_BADMAGIC,\r | |
379 | * -FDT_ERR_BADVERSION,\r | |
380 | * -FDT_ERR_BADSTATE,\r | |
381 | * -FDT_ERR_BADSTRUCTURE,\r | |
382 | * -FDT_ERR_TRUNCATED, standard meanings.\r | |
383 | */\r | |
384 | int fdt_next_property_offset(const void *fdt, int offset);\r | |
385 | \r | |
386 | /**\r | |
387 | * fdt_get_property_by_offset - retrieve the property at a given offset\r | |
388 | * @fdt: pointer to the device tree blob\r | |
389 | * @offset: offset of the property to retrieve\r | |
390 | * @lenp: pointer to an integer variable (will be overwritten) or NULL\r | |
391 | *\r | |
392 | * fdt_get_property_by_offset() retrieves a pointer to the\r | |
393 | * fdt_property structure within the device tree blob at the given\r | |
394 | * offset. If lenp is non-NULL, the length of the property value is\r | |
395 | * also returned, in the integer pointed to by lenp.\r | |
396 | *\r | |
397 | * returns:\r | |
398 | * pointer to the structure representing the property\r | |
399 | * if lenp is non-NULL, *lenp contains the length of the property\r | |
400 | * value (>=0)\r | |
401 | * NULL, on error\r | |
402 | * if lenp is non-NULL, *lenp contains an error code (<0):\r | |
403 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag\r | |
404 | * -FDT_ERR_BADMAGIC,\r | |
405 | * -FDT_ERR_BADVERSION,\r | |
406 | * -FDT_ERR_BADSTATE,\r | |
407 | * -FDT_ERR_BADSTRUCTURE,\r | |
408 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
409 | */\r | |
410 | const struct fdt_property *fdt_get_property_by_offset(const void *fdt,\r | |
411 | int offset,\r | |
412 | int *lenp);\r | |
413 | \r | |
414 | /**\r | |
415 | * fdt_get_property_namelen - find a property based on substring\r | |
416 | * @fdt: pointer to the device tree blob\r | |
417 | * @nodeoffset: offset of the node whose property to find\r | |
418 | * @name: name of the property to find\r | |
419 | * @namelen: number of characters of name to consider\r | |
420 | * @lenp: pointer to an integer variable (will be overwritten) or NULL\r | |
421 | *\r | |
422 | * Identical to fdt_get_property_namelen(), but only examine the first\r | |
423 | * namelen characters of name for matching the property name.\r | |
424 | */\r | |
425 | const struct fdt_property *fdt_get_property_namelen(const void *fdt,\r | |
426 | int nodeoffset,\r | |
427 | const char *name,\r | |
428 | int namelen, int *lenp);\r | |
429 | \r | |
430 | /**\r | |
431 | * fdt_get_property - find a given property in a given node\r | |
432 | * @fdt: pointer to the device tree blob\r | |
433 | * @nodeoffset: offset of the node whose property to find\r | |
434 | * @name: name of the property to find\r | |
435 | * @lenp: pointer to an integer variable (will be overwritten) or NULL\r | |
436 | *\r | |
437 | * fdt_get_property() retrieves a pointer to the fdt_property\r | |
438 | * structure within the device tree blob corresponding to the property\r | |
439 | * named 'name' of the node at offset nodeoffset. If lenp is\r | |
440 | * non-NULL, the length of the property value is also returned, in the\r | |
441 | * integer pointed to by lenp.\r | |
442 | *\r | |
443 | * returns:\r | |
444 | * pointer to the structure representing the property\r | |
445 | * if lenp is non-NULL, *lenp contains the length of the property\r | |
446 | * value (>=0)\r | |
447 | * NULL, on error\r | |
448 | * if lenp is non-NULL, *lenp contains an error code (<0):\r | |
449 | * -FDT_ERR_NOTFOUND, node does not have named property\r | |
450 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
451 | * -FDT_ERR_BADMAGIC,\r | |
452 | * -FDT_ERR_BADVERSION,\r | |
453 | * -FDT_ERR_BADSTATE,\r | |
454 | * -FDT_ERR_BADSTRUCTURE,\r | |
455 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
456 | */\r | |
457 | const struct fdt_property *fdt_get_property(const void *fdt, int nodeoffset,\r | |
458 | const char *name, int *lenp);\r | |
459 | static inline struct fdt_property *fdt_get_property_w(void *fdt, int nodeoffset,\r | |
460 | const char *name,\r | |
461 | int *lenp)\r | |
462 | {\r | |
463 | return (struct fdt_property *)(uintptr_t)\r | |
464 | fdt_get_property(fdt, nodeoffset, name, lenp);\r | |
465 | }\r | |
466 | \r | |
467 | /**\r | |
468 | * fdt_getprop_by_offset - retrieve the value of a property at a given offset\r | |
469 | * @fdt: pointer to the device tree blob\r | |
470 | * @ffset: offset of the property to read\r | |
471 | * @namep: pointer to a string variable (will be overwritten) or NULL\r | |
472 | * @lenp: pointer to an integer variable (will be overwritten) or NULL\r | |
473 | *\r | |
474 | * fdt_getprop_by_offset() retrieves a pointer to the value of the\r | |
475 | * property at structure block offset 'offset' (this will be a pointer\r | |
476 | * to within the device blob itself, not a copy of the value). If\r | |
477 | * lenp is non-NULL, the length of the property value is also\r | |
478 | * returned, in the integer pointed to by lenp. If namep is non-NULL,\r | |
479 | * the property's namne will also be returned in the char * pointed to\r | |
480 | * by namep (this will be a pointer to within the device tree's string\r | |
481 | * block, not a new copy of the name).\r | |
482 | *\r | |
483 | * returns:\r | |
484 | * pointer to the property's value\r | |
485 | * if lenp is non-NULL, *lenp contains the length of the property\r | |
486 | * value (>=0)\r | |
487 | * if namep is non-NULL *namep contiains a pointer to the property\r | |
488 | * name.\r | |
489 | * NULL, on error\r | |
490 | * if lenp is non-NULL, *lenp contains an error code (<0):\r | |
491 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag\r | |
492 | * -FDT_ERR_BADMAGIC,\r | |
493 | * -FDT_ERR_BADVERSION,\r | |
494 | * -FDT_ERR_BADSTATE,\r | |
495 | * -FDT_ERR_BADSTRUCTURE,\r | |
496 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
497 | */\r | |
498 | const void *fdt_getprop_by_offset(const void *fdt, int offset,\r | |
499 | const char **namep, int *lenp);\r | |
500 | \r | |
501 | /**\r | |
502 | * fdt_getprop_namelen - get property value based on substring\r | |
503 | * @fdt: pointer to the device tree blob\r | |
504 | * @nodeoffset: offset of the node whose property to find\r | |
505 | * @name: name of the property to find\r | |
506 | * @namelen: number of characters of name to consider\r | |
507 | * @lenp: pointer to an integer variable (will be overwritten) or NULL\r | |
508 | *\r | |
509 | * Identical to fdt_getprop(), but only examine the first namelen\r | |
510 | * characters of name for matching the property name.\r | |
511 | */\r | |
512 | const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,\r | |
513 | const char *name, int namelen, int *lenp);\r | |
514 | \r | |
515 | /**\r | |
516 | * fdt_getprop - retrieve the value of a given property\r | |
517 | * @fdt: pointer to the device tree blob\r | |
518 | * @nodeoffset: offset of the node whose property to find\r | |
519 | * @name: name of the property to find\r | |
520 | * @lenp: pointer to an integer variable (will be overwritten) or NULL\r | |
521 | *\r | |
522 | * fdt_getprop() retrieves a pointer to the value of the property\r | |
523 | * named 'name' of the node at offset nodeoffset (this will be a\r | |
524 | * pointer to within the device blob itself, not a copy of the value).\r | |
525 | * If lenp is non-NULL, the length of the property value is also\r | |
526 | * returned, in the integer pointed to by lenp.\r | |
527 | *\r | |
528 | * returns:\r | |
529 | * pointer to the property's value\r | |
530 | * if lenp is non-NULL, *lenp contains the length of the property\r | |
531 | * value (>=0)\r | |
532 | * NULL, on error\r | |
533 | * if lenp is non-NULL, *lenp contains an error code (<0):\r | |
534 | * -FDT_ERR_NOTFOUND, node does not have named property\r | |
535 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
536 | * -FDT_ERR_BADMAGIC,\r | |
537 | * -FDT_ERR_BADVERSION,\r | |
538 | * -FDT_ERR_BADSTATE,\r | |
539 | * -FDT_ERR_BADSTRUCTURE,\r | |
540 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
541 | */\r | |
542 | const void *fdt_getprop(const void *fdt, int nodeoffset,\r | |
543 | const char *name, int *lenp);\r | |
544 | static inline void *fdt_getprop_w(void *fdt, int nodeoffset,\r | |
545 | const char *name, int *lenp)\r | |
546 | {\r | |
547 | return (void *)(uintptr_t)fdt_getprop(fdt, nodeoffset, name, lenp);\r | |
548 | }\r | |
549 | \r | |
550 | /**\r | |
551 | * fdt_get_phandle - retrieve the phandle of a given node\r | |
552 | * @fdt: pointer to the device tree blob\r | |
553 | * @nodeoffset: structure block offset of the node\r | |
554 | *\r | |
555 | * fdt_get_phandle() retrieves the phandle of the device tree node at\r | |
556 | * structure block offset nodeoffset.\r | |
557 | *\r | |
558 | * returns:\r | |
559 | * the phandle of the node at nodeoffset, on success (!= 0, != -1)\r | |
560 | * 0, if the node has no phandle, or another error occurs\r | |
561 | */\r | |
562 | uint32_t fdt_get_phandle(const void *fdt, int nodeoffset);\r | |
563 | \r | |
564 | /**\r | |
565 | * fdt_get_alias_namelen - get alias based on substring\r | |
566 | * @fdt: pointer to the device tree blob\r | |
567 | * @name: name of the alias th look up\r | |
568 | * @namelen: number of characters of name to consider\r | |
569 | *\r | |
570 | * Identical to fdt_get_alias(), but only examine the first namelen\r | |
571 | * characters of name for matching the alias name.\r | |
572 | */\r | |
573 | const char *fdt_get_alias_namelen(const void *fdt,\r | |
574 | const char *name, int namelen);\r | |
575 | \r | |
576 | /**\r | |
577 | * fdt_get_alias - retreive the path referenced by a given alias\r | |
578 | * @fdt: pointer to the device tree blob\r | |
579 | * @name: name of the alias th look up\r | |
580 | *\r | |
581 | * fdt_get_alias() retrieves the value of a given alias. That is, the\r | |
582 | * value of the property named 'name' in the node /aliases.\r | |
583 | *\r | |
584 | * returns:\r | |
585 | * a pointer to the expansion of the alias named 'name', of it exists\r | |
586 | * NULL, if the given alias or the /aliases node does not exist\r | |
587 | */\r | |
588 | const char *fdt_get_alias(const void *fdt, const char *name);\r | |
589 | \r | |
590 | /**\r | |
591 | * fdt_get_path - determine the full path of a node\r | |
592 | * @fdt: pointer to the device tree blob\r | |
593 | * @nodeoffset: offset of the node whose path to find\r | |
594 | * @buf: character buffer to contain the returned path (will be overwritten)\r | |
595 | * @buflen: size of the character buffer at buf\r | |
596 | *\r | |
597 | * fdt_get_path() computes the full path of the node at offset\r | |
598 | * nodeoffset, and records that path in the buffer at buf.\r | |
599 | *\r | |
600 | * NOTE: This function is expensive, as it must scan the device tree\r | |
601 | * structure from the start to nodeoffset.\r | |
602 | *\r | |
603 | * returns:\r | |
604 | * 0, on success\r | |
605 | * buf contains the absolute path of the node at\r | |
606 | * nodeoffset, as a NUL-terminated string.\r | |
607 | * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r | |
608 | * -FDT_ERR_NOSPACE, the path of the given node is longer than (bufsize-1)\r | |
609 | * characters and will not fit in the given buffer.\r | |
610 | * -FDT_ERR_BADMAGIC,\r | |
611 | * -FDT_ERR_BADVERSION,\r | |
612 | * -FDT_ERR_BADSTATE,\r | |
613 | * -FDT_ERR_BADSTRUCTURE, standard meanings\r | |
614 | */\r | |
615 | int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen);\r | |
616 | \r | |
617 | /**\r | |
618 | * fdt_supernode_atdepth_offset - find a specific ancestor of a node\r | |
619 | * @fdt: pointer to the device tree blob\r | |
620 | * @nodeoffset: offset of the node whose parent to find\r | |
621 | * @supernodedepth: depth of the ancestor to find\r | |
622 | * @nodedepth: pointer to an integer variable (will be overwritten) or NULL\r | |
623 | *\r | |
624 | * fdt_supernode_atdepth_offset() finds an ancestor of the given node\r | |
625 | * at a specific depth from the root (where the root itself has depth\r | |
626 | * 0, its immediate subnodes depth 1 and so forth). So\r | |
627 | * fdt_supernode_atdepth_offset(fdt, nodeoffset, 0, NULL);\r | |
628 | * will always return 0, the offset of the root node. If the node at\r | |
629 | * nodeoffset has depth D, then:\r | |
630 | * fdt_supernode_atdepth_offset(fdt, nodeoffset, D, NULL);\r | |
631 | * will return nodeoffset itself.\r | |
632 | *\r | |
633 | * NOTE: This function is expensive, as it must scan the device tree\r | |
634 | * structure from the start to nodeoffset.\r | |
635 | *\r | |
636 | * returns:\r | |
637 | \r | |
638 | * structure block offset of the node at node offset's ancestor\r | |
639 | * of depth supernodedepth (>=0), on success\r | |
640 | * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r | |
641 | * -FDT_ERR_NOTFOUND, supernodedepth was greater than the depth of nodeoffset\r | |
642 | * -FDT_ERR_BADMAGIC,\r | |
643 | * -FDT_ERR_BADVERSION,\r | |
644 | * -FDT_ERR_BADSTATE,\r | |
645 | * -FDT_ERR_BADSTRUCTURE, standard meanings\r | |
646 | */\r | |
647 | int fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset,\r | |
648 | int supernodedepth, int *nodedepth);\r | |
649 | \r | |
650 | /**\r | |
651 | * fdt_node_depth - find the depth of a given node\r | |
652 | * @fdt: pointer to the device tree blob\r | |
653 | * @nodeoffset: offset of the node whose parent to find\r | |
654 | *\r | |
655 | * fdt_node_depth() finds the depth of a given node. The root node\r | |
656 | * has depth 0, its immediate subnodes depth 1 and so forth.\r | |
657 | *\r | |
658 | * NOTE: This function is expensive, as it must scan the device tree\r | |
659 | * structure from the start to nodeoffset.\r | |
660 | *\r | |
661 | * returns:\r | |
662 | * depth of the node at nodeoffset (>=0), on success\r | |
663 | * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r | |
664 | * -FDT_ERR_BADMAGIC,\r | |
665 | * -FDT_ERR_BADVERSION,\r | |
666 | * -FDT_ERR_BADSTATE,\r | |
667 | * -FDT_ERR_BADSTRUCTURE, standard meanings\r | |
668 | */\r | |
669 | int fdt_node_depth(const void *fdt, int nodeoffset);\r | |
670 | \r | |
671 | /**\r | |
672 | * fdt_parent_offset - find the parent of a given node\r | |
673 | * @fdt: pointer to the device tree blob\r | |
674 | * @nodeoffset: offset of the node whose parent to find\r | |
675 | *\r | |
676 | * fdt_parent_offset() locates the parent node of a given node (that\r | |
677 | * is, it finds the offset of the node which contains the node at\r | |
678 | * nodeoffset as a subnode).\r | |
679 | *\r | |
680 | * NOTE: This function is expensive, as it must scan the device tree\r | |
681 | * structure from the start to nodeoffset, *twice*.\r | |
682 | *\r | |
683 | * returns:\r | |
684 | * structure block offset of the parent of the node at nodeoffset\r | |
685 | * (>=0), on success\r | |
686 | * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r | |
687 | * -FDT_ERR_BADMAGIC,\r | |
688 | * -FDT_ERR_BADVERSION,\r | |
689 | * -FDT_ERR_BADSTATE,\r | |
690 | * -FDT_ERR_BADSTRUCTURE, standard meanings\r | |
691 | */\r | |
692 | int fdt_parent_offset(const void *fdt, int nodeoffset);\r | |
693 | \r | |
694 | /**\r | |
695 | * fdt_node_offset_by_prop_value - find nodes with a given property value\r | |
696 | * @fdt: pointer to the device tree blob\r | |
697 | * @startoffset: only find nodes after this offset\r | |
698 | * @propname: property name to check\r | |
699 | * @propval: property value to search for\r | |
700 | * @proplen: length of the value in propval\r | |
701 | *\r | |
702 | * fdt_node_offset_by_prop_value() returns the offset of the first\r | |
703 | * node after startoffset, which has a property named propname whose\r | |
704 | * value is of length proplen and has value equal to propval; or if\r | |
705 | * startoffset is -1, the very first such node in the tree.\r | |
706 | *\r | |
707 | * To iterate through all nodes matching the criterion, the following\r | |
708 | * idiom can be used:\r | |
709 | * offset = fdt_node_offset_by_prop_value(fdt, -1, propname,\r | |
710 | * propval, proplen);\r | |
711 | * while (offset != -FDT_ERR_NOTFOUND) {\r | |
712 | * // other code here\r | |
713 | * offset = fdt_node_offset_by_prop_value(fdt, offset, propname,\r | |
714 | * propval, proplen);\r | |
715 | * }\r | |
716 | *\r | |
717 | * Note the -1 in the first call to the function, if 0 is used here\r | |
718 | * instead, the function will never locate the root node, even if it\r | |
719 | * matches the criterion.\r | |
720 | *\r | |
721 | * returns:\r | |
722 | * structure block offset of the located node (>= 0, >startoffset),\r | |
723 | * on success\r | |
724 | * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the\r | |
725 | * tree after startoffset\r | |
726 | * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r | |
727 | * -FDT_ERR_BADMAGIC,\r | |
728 | * -FDT_ERR_BADVERSION,\r | |
729 | * -FDT_ERR_BADSTATE,\r | |
730 | * -FDT_ERR_BADSTRUCTURE, standard meanings\r | |
731 | */\r | |
732 | int fdt_node_offset_by_prop_value(const void *fdt, int startoffset,\r | |
733 | const char *propname,\r | |
734 | const void *propval, int proplen);\r | |
735 | \r | |
736 | /**\r | |
737 | * fdt_node_offset_by_phandle - find the node with a given phandle\r | |
738 | * @fdt: pointer to the device tree blob\r | |
739 | * @phandle: phandle value\r | |
740 | *\r | |
741 | * fdt_node_offset_by_phandle() returns the offset of the node\r | |
742 | * which has the given phandle value. If there is more than one node\r | |
743 | * in the tree with the given phandle (an invalid tree), results are\r | |
744 | * undefined.\r | |
745 | *\r | |
746 | * returns:\r | |
747 | * structure block offset of the located node (>= 0), on success\r | |
748 | * -FDT_ERR_NOTFOUND, no node with that phandle exists\r | |
749 | * -FDT_ERR_BADPHANDLE, given phandle value was invalid (0 or -1)\r | |
750 | * -FDT_ERR_BADMAGIC,\r | |
751 | * -FDT_ERR_BADVERSION,\r | |
752 | * -FDT_ERR_BADSTATE,\r | |
753 | * -FDT_ERR_BADSTRUCTURE, standard meanings\r | |
754 | */\r | |
755 | int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle);\r | |
756 | \r | |
757 | /**\r | |
758 | * fdt_node_check_compatible: check a node's compatible property\r | |
759 | * @fdt: pointer to the device tree blob\r | |
760 | * @nodeoffset: offset of a tree node\r | |
761 | * @compatible: string to match against\r | |
762 | *\r | |
763 | *\r | |
764 | * fdt_node_check_compatible() returns 0 if the given node contains a\r | |
765 | * 'compatible' property with the given string as one of its elements,\r | |
766 | * it returns non-zero otherwise, or on error.\r | |
767 | *\r | |
768 | * returns:\r | |
769 | * 0, if the node has a 'compatible' property listing the given string\r | |
770 | * 1, if the node has a 'compatible' property, but it does not list\r | |
771 | * the given string\r | |
772 | * -FDT_ERR_NOTFOUND, if the given node has no 'compatible' property\r | |
773 | * -FDT_ERR_BADOFFSET, if nodeoffset does not refer to a BEGIN_NODE tag\r | |
774 | * -FDT_ERR_BADMAGIC,\r | |
775 | * -FDT_ERR_BADVERSION,\r | |
776 | * -FDT_ERR_BADSTATE,\r | |
777 | * -FDT_ERR_BADSTRUCTURE, standard meanings\r | |
778 | */\r | |
779 | int fdt_node_check_compatible(const void *fdt, int nodeoffset,\r | |
780 | const char *compatible);\r | |
781 | \r | |
782 | /**\r | |
783 | * fdt_node_offset_by_compatible - find nodes with a given 'compatible' value\r | |
784 | * @fdt: pointer to the device tree blob\r | |
785 | * @startoffset: only find nodes after this offset\r | |
786 | * @compatible: 'compatible' string to match against\r | |
787 | *\r | |
788 | * fdt_node_offset_by_compatible() returns the offset of the first\r | |
789 | * node after startoffset, which has a 'compatible' property which\r | |
790 | * lists the given compatible string; or if startoffset is -1, the\r | |
791 | * very first such node in the tree.\r | |
792 | *\r | |
793 | * To iterate through all nodes matching the criterion, the following\r | |
794 | * idiom can be used:\r | |
795 | * offset = fdt_node_offset_by_compatible(fdt, -1, compatible);\r | |
796 | * while (offset != -FDT_ERR_NOTFOUND) {\r | |
797 | * // other code here\r | |
798 | * offset = fdt_node_offset_by_compatible(fdt, offset, compatible);\r | |
799 | * }\r | |
800 | *\r | |
801 | * Note the -1 in the first call to the function, if 0 is used here\r | |
802 | * instead, the function will never locate the root node, even if it\r | |
803 | * matches the criterion.\r | |
804 | *\r | |
805 | * returns:\r | |
806 | * structure block offset of the located node (>= 0, >startoffset),\r | |
807 | * on success\r | |
808 | * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the\r | |
809 | * tree after startoffset\r | |
810 | * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r | |
811 | * -FDT_ERR_BADMAGIC,\r | |
812 | * -FDT_ERR_BADVERSION,\r | |
813 | * -FDT_ERR_BADSTATE,\r | |
814 | * -FDT_ERR_BADSTRUCTURE, standard meanings\r | |
815 | */\r | |
816 | int fdt_node_offset_by_compatible(const void *fdt, int startoffset,\r | |
817 | const char *compatible);\r | |
818 | \r | |
819 | /**********************************************************************/\r | |
820 | /* Write-in-place functions */\r | |
821 | /**********************************************************************/\r | |
822 | \r | |
823 | /**\r | |
824 | * fdt_setprop_inplace - change a property's value, but not its size\r | |
825 | * @fdt: pointer to the device tree blob\r | |
826 | * @nodeoffset: offset of the node whose property to change\r | |
827 | * @name: name of the property to change\r | |
828 | * @val: pointer to data to replace the property value with\r | |
829 | * @len: length of the property value\r | |
830 | *\r | |
831 | * fdt_setprop_inplace() replaces the value of a given property with\r | |
832 | * the data in val, of length len. This function cannot change the\r | |
833 | * size of a property, and so will only work if len is equal to the\r | |
834 | * current length of the property.\r | |
835 | *\r | |
836 | * This function will alter only the bytes in the blob which contain\r | |
837 | * the given property value, and will not alter or move any other part\r | |
838 | * of the tree.\r | |
839 | *\r | |
840 | * returns:\r | |
841 | * 0, on success\r | |
842 | * -FDT_ERR_NOSPACE, if len is not equal to the property's current length\r | |
843 | * -FDT_ERR_NOTFOUND, node does not have the named property\r | |
844 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
845 | * -FDT_ERR_BADMAGIC,\r | |
846 | * -FDT_ERR_BADVERSION,\r | |
847 | * -FDT_ERR_BADSTATE,\r | |
848 | * -FDT_ERR_BADSTRUCTURE,\r | |
849 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
850 | */\r | |
851 | int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,\r | |
852 | const void *val, int len);\r | |
853 | \r | |
854 | /**\r | |
855 | * fdt_setprop_inplace_u32 - change the value of a 32-bit integer property\r | |
856 | * @fdt: pointer to the device tree blob\r | |
857 | * @nodeoffset: offset of the node whose property to change\r | |
858 | * @name: name of the property to change\r | |
859 | * @val: 32-bit integer value to replace the property with\r | |
860 | *\r | |
861 | * fdt_setprop_inplace_u32() replaces the value of a given property\r | |
862 | * with the 32-bit integer value in val, converting val to big-endian\r | |
863 | * if necessary. This function cannot change the size of a property,\r | |
864 | * and so will only work if the property already exists and has length\r | |
865 | * 4.\r | |
866 | *\r | |
867 | * This function will alter only the bytes in the blob which contain\r | |
868 | * the given property value, and will not alter or move any other part\r | |
869 | * of the tree.\r | |
870 | *\r | |
871 | * returns:\r | |
872 | * 0, on success\r | |
873 | * -FDT_ERR_NOSPACE, if the property's length is not equal to 4\r | |
874 | * -FDT_ERR_NOTFOUND, node does not have the named property\r | |
875 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
876 | * -FDT_ERR_BADMAGIC,\r | |
877 | * -FDT_ERR_BADVERSION,\r | |
878 | * -FDT_ERR_BADSTATE,\r | |
879 | * -FDT_ERR_BADSTRUCTURE,\r | |
880 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
881 | */\r | |
882 | static inline int fdt_setprop_inplace_u32(void *fdt, int nodeoffset,\r | |
883 | const char *name, uint32_t val)\r | |
884 | {\r | |
885 | val = cpu_to_fdt32(val);\r | |
886 | return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val));\r | |
887 | }\r | |
888 | \r | |
889 | /**\r | |
890 | * fdt_setprop_inplace_u64 - change the value of a 64-bit integer property\r | |
891 | * @fdt: pointer to the device tree blob\r | |
892 | * @nodeoffset: offset of the node whose property to change\r | |
893 | * @name: name of the property to change\r | |
894 | * @val: 64-bit integer value to replace the property with\r | |
895 | *\r | |
896 | * fdt_setprop_inplace_u64() replaces the value of a given property\r | |
897 | * with the 64-bit integer value in val, converting val to big-endian\r | |
898 | * if necessary. This function cannot change the size of a property,\r | |
899 | * and so will only work if the property already exists and has length\r | |
900 | * 8.\r | |
901 | *\r | |
902 | * This function will alter only the bytes in the blob which contain\r | |
903 | * the given property value, and will not alter or move any other part\r | |
904 | * of the tree.\r | |
905 | *\r | |
906 | * returns:\r | |
907 | * 0, on success\r | |
908 | * -FDT_ERR_NOSPACE, if the property's length is not equal to 8\r | |
909 | * -FDT_ERR_NOTFOUND, node does not have the named property\r | |
910 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
911 | * -FDT_ERR_BADMAGIC,\r | |
912 | * -FDT_ERR_BADVERSION,\r | |
913 | * -FDT_ERR_BADSTATE,\r | |
914 | * -FDT_ERR_BADSTRUCTURE,\r | |
915 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
916 | */\r | |
917 | static inline int fdt_setprop_inplace_u64(void *fdt, int nodeoffset,\r | |
918 | const char *name, uint64_t val)\r | |
919 | {\r | |
920 | val = cpu_to_fdt64(val);\r | |
921 | return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val));\r | |
922 | }\r | |
923 | \r | |
924 | /**\r | |
925 | * fdt_setprop_inplace_cell - change the value of a single-cell property\r | |
926 | *\r | |
927 | * This is an alternative name for fdt_setprop_inplace_u32()\r | |
928 | */\r | |
929 | static inline int fdt_setprop_inplace_cell(void *fdt, int nodeoffset,\r | |
930 | const char *name, uint32_t val)\r | |
931 | {\r | |
932 | return fdt_setprop_inplace_u32(fdt, nodeoffset, name, val);\r | |
933 | }\r | |
934 | \r | |
935 | /**\r | |
936 | * fdt_nop_property - replace a property with nop tags\r | |
937 | * @fdt: pointer to the device tree blob\r | |
938 | * @nodeoffset: offset of the node whose property to nop\r | |
939 | * @name: name of the property to nop\r | |
940 | *\r | |
941 | * fdt_nop_property() will replace a given property's representation\r | |
942 | * in the blob with FDT_NOP tags, effectively removing it from the\r | |
943 | * tree.\r | |
944 | *\r | |
945 | * This function will alter only the bytes in the blob which contain\r | |
946 | * the property, and will not alter or move any other part of the\r | |
947 | * tree.\r | |
948 | *\r | |
949 | * returns:\r | |
950 | * 0, on success\r | |
951 | * -FDT_ERR_NOTFOUND, node does not have the named property\r | |
952 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
953 | * -FDT_ERR_BADMAGIC,\r | |
954 | * -FDT_ERR_BADVERSION,\r | |
955 | * -FDT_ERR_BADSTATE,\r | |
956 | * -FDT_ERR_BADSTRUCTURE,\r | |
957 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
958 | */\r | |
959 | int fdt_nop_property(void *fdt, int nodeoffset, const char *name);\r | |
960 | \r | |
961 | /**\r | |
962 | * fdt_nop_node - replace a node (subtree) with nop tags\r | |
963 | * @fdt: pointer to the device tree blob\r | |
964 | * @nodeoffset: offset of the node to nop\r | |
965 | *\r | |
966 | * fdt_nop_node() will replace a given node's representation in the\r | |
967 | * blob, including all its subnodes, if any, with FDT_NOP tags,\r | |
968 | * effectively removing it from the tree.\r | |
969 | *\r | |
970 | * This function will alter only the bytes in the blob which contain\r | |
971 | * the node and its properties and subnodes, and will not alter or\r | |
972 | * move any other part of the tree.\r | |
973 | *\r | |
974 | * returns:\r | |
975 | * 0, on success\r | |
976 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
977 | * -FDT_ERR_BADMAGIC,\r | |
978 | * -FDT_ERR_BADVERSION,\r | |
979 | * -FDT_ERR_BADSTATE,\r | |
980 | * -FDT_ERR_BADSTRUCTURE,\r | |
981 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
982 | */\r | |
983 | int fdt_nop_node(void *fdt, int nodeoffset);\r | |
984 | \r | |
985 | /**********************************************************************/\r | |
986 | /* Sequential write functions */\r | |
987 | /**********************************************************************/\r | |
988 | \r | |
989 | int fdt_create(void *buf, int bufsize);\r | |
990 | int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size);\r | |
991 | int fdt_finish_reservemap(void *fdt);\r | |
992 | int fdt_begin_node(void *fdt, const char *name);\r | |
993 | int fdt_property(void *fdt, const char *name, const void *val, int len);\r | |
994 | static inline int fdt_property_u32(void *fdt, const char *name, uint32_t val)\r | |
995 | {\r | |
996 | val = cpu_to_fdt32(val);\r | |
997 | return fdt_property(fdt, name, &val, sizeof(val));\r | |
998 | }\r | |
999 | static inline int fdt_property_u64(void *fdt, const char *name, uint64_t val)\r | |
1000 | {\r | |
1001 | val = cpu_to_fdt64(val);\r | |
1002 | return fdt_property(fdt, name, &val, sizeof(val));\r | |
1003 | }\r | |
1004 | static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val)\r | |
1005 | {\r | |
1006 | return fdt_property_u32(fdt, name, val);\r | |
1007 | }\r | |
1008 | #define fdt_property_string(fdt, name, str) \\r | |
1009 | fdt_property(fdt, name, str, strlen(str)+1)\r | |
1010 | int fdt_end_node(void *fdt);\r | |
1011 | int fdt_finish(void *fdt);\r | |
1012 | \r | |
1013 | /**********************************************************************/\r | |
1014 | /* Read-write functions */\r | |
1015 | /**********************************************************************/\r | |
1016 | \r | |
1017 | int fdt_create_empty_tree(void *buf, int bufsize);\r | |
1018 | int fdt_open_into(const void *fdt, void *buf, int bufsize);\r | |
1019 | int fdt_pack(void *fdt);\r | |
1020 | \r | |
1021 | /**\r | |
1022 | * fdt_add_mem_rsv - add one memory reserve map entry\r | |
1023 | * @fdt: pointer to the device tree blob\r | |
1024 | * @address, @size: 64-bit values (native endian)\r | |
1025 | *\r | |
1026 | * Adds a reserve map entry to the given blob reserving a region at\r | |
1027 | * address address of length size.\r | |
1028 | *\r | |
1029 | * This function will insert data into the reserve map and will\r | |
1030 | * therefore change the indexes of some entries in the table.\r | |
1031 | *\r | |
1032 | * returns:\r | |
1033 | * 0, on success\r | |
1034 | * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r | |
1035 | * contain the new reservation entry\r | |
1036 | * -FDT_ERR_BADMAGIC,\r | |
1037 | * -FDT_ERR_BADVERSION,\r | |
1038 | * -FDT_ERR_BADSTATE,\r | |
1039 | * -FDT_ERR_BADSTRUCTURE,\r | |
1040 | * -FDT_ERR_BADLAYOUT,\r | |
1041 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1042 | */\r | |
1043 | int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size);\r | |
1044 | \r | |
1045 | /**\r | |
1046 | * fdt_del_mem_rsv - remove a memory reserve map entry\r | |
1047 | * @fdt: pointer to the device tree blob\r | |
1048 | * @n: entry to remove\r | |
1049 | *\r | |
1050 | * fdt_del_mem_rsv() removes the n-th memory reserve map entry from\r | |
1051 | * the blob.\r | |
1052 | *\r | |
1053 | * This function will delete data from the reservation table and will\r | |
1054 | * therefore change the indexes of some entries in the table.\r | |
1055 | *\r | |
1056 | * returns:\r | |
1057 | * 0, on success\r | |
1058 | * -FDT_ERR_NOTFOUND, there is no entry of the given index (i.e. there\r | |
1059 | * are less than n+1 reserve map entries)\r | |
1060 | * -FDT_ERR_BADMAGIC,\r | |
1061 | * -FDT_ERR_BADVERSION,\r | |
1062 | * -FDT_ERR_BADSTATE,\r | |
1063 | * -FDT_ERR_BADSTRUCTURE,\r | |
1064 | * -FDT_ERR_BADLAYOUT,\r | |
1065 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1066 | */\r | |
1067 | int fdt_del_mem_rsv(void *fdt, int n);\r | |
1068 | \r | |
1069 | /**\r | |
1070 | * fdt_set_name - change the name of a given node\r | |
1071 | * @fdt: pointer to the device tree blob\r | |
1072 | * @nodeoffset: structure block offset of a node\r | |
1073 | * @name: name to give the node\r | |
1074 | *\r | |
1075 | * fdt_set_name() replaces the name (including unit address, if any)\r | |
1076 | * of the given node with the given string. NOTE: this function can't\r | |
1077 | * efficiently check if the new name is unique amongst the given\r | |
1078 | * node's siblings; results are undefined if this function is invoked\r | |
1079 | * with a name equal to one of the given node's siblings.\r | |
1080 | *\r | |
1081 | * This function may insert or delete data from the blob, and will\r | |
1082 | * therefore change the offsets of some existing nodes.\r | |
1083 | *\r | |
1084 | * returns:\r | |
1085 | * 0, on success\r | |
1086 | * -FDT_ERR_NOSPACE, there is insufficient free space in the blob\r | |
1087 | * to contain the new name\r | |
1088 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
1089 | * -FDT_ERR_BADMAGIC,\r | |
1090 | * -FDT_ERR_BADVERSION,\r | |
1091 | * -FDT_ERR_BADSTATE, standard meanings\r | |
1092 | */\r | |
1093 | int fdt_set_name(void *fdt, int nodeoffset, const char *name);\r | |
1094 | \r | |
1095 | /**\r | |
1096 | * fdt_setprop - create or change a property\r | |
1097 | * @fdt: pointer to the device tree blob\r | |
1098 | * @nodeoffset: offset of the node whose property to change\r | |
1099 | * @name: name of the property to change\r | |
1100 | * @val: pointer to data to set the property value to\r | |
1101 | * @len: length of the property value\r | |
1102 | *\r | |
1103 | * fdt_setprop() sets the value of the named property in the given\r | |
1104 | * node to the given value and length, creating the property if it\r | |
1105 | * does not already exist.\r | |
1106 | *\r | |
1107 | * This function may insert or delete data from the blob, and will\r | |
1108 | * therefore change the offsets of some existing nodes.\r | |
1109 | *\r | |
1110 | * returns:\r | |
1111 | * 0, on success\r | |
1112 | * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r | |
1113 | * contain the new property value\r | |
1114 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
1115 | * -FDT_ERR_BADLAYOUT,\r | |
1116 | * -FDT_ERR_BADMAGIC,\r | |
1117 | * -FDT_ERR_BADVERSION,\r | |
1118 | * -FDT_ERR_BADSTATE,\r | |
1119 | * -FDT_ERR_BADSTRUCTURE,\r | |
1120 | * -FDT_ERR_BADLAYOUT,\r | |
1121 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1122 | */\r | |
1123 | int fdt_setprop(void *fdt, int nodeoffset, const char *name,\r | |
1124 | const void *val, int len);\r | |
1125 | \r | |
1126 | /**\r | |
1127 | * fdt_setprop_u32 - set a property to a 32-bit integer\r | |
1128 | * @fdt: pointer to the device tree blob\r | |
1129 | * @nodeoffset: offset of the node whose property to change\r | |
1130 | * @name: name of the property to change\r | |
1131 | * @val: 32-bit integer value for the property (native endian)\r | |
1132 | *\r | |
1133 | * fdt_setprop_u32() sets the value of the named property in the given\r | |
1134 | * node to the given 32-bit integer value (converting to big-endian if\r | |
1135 | * necessary), or creates a new property with that value if it does\r | |
1136 | * not already exist.\r | |
1137 | *\r | |
1138 | * This function may insert or delete data from the blob, and will\r | |
1139 | * therefore change the offsets of some existing nodes.\r | |
1140 | *\r | |
1141 | * returns:\r | |
1142 | * 0, on success\r | |
1143 | * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r | |
1144 | * contain the new property value\r | |
1145 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
1146 | * -FDT_ERR_BADLAYOUT,\r | |
1147 | * -FDT_ERR_BADMAGIC,\r | |
1148 | * -FDT_ERR_BADVERSION,\r | |
1149 | * -FDT_ERR_BADSTATE,\r | |
1150 | * -FDT_ERR_BADSTRUCTURE,\r | |
1151 | * -FDT_ERR_BADLAYOUT,\r | |
1152 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1153 | */\r | |
1154 | static inline int fdt_setprop_u32(void *fdt, int nodeoffset, const char *name,\r | |
1155 | uint32_t val)\r | |
1156 | {\r | |
1157 | val = cpu_to_fdt32(val);\r | |
1158 | return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val));\r | |
1159 | }\r | |
1160 | \r | |
1161 | /**\r | |
1162 | * fdt_setprop_u64 - set a property to a 64-bit integer\r | |
1163 | * @fdt: pointer to the device tree blob\r | |
1164 | * @nodeoffset: offset of the node whose property to change\r | |
1165 | * @name: name of the property to change\r | |
1166 | * @val: 64-bit integer value for the property (native endian)\r | |
1167 | *\r | |
1168 | * fdt_setprop_u64() sets the value of the named property in the given\r | |
1169 | * node to the given 64-bit integer value (converting to big-endian if\r | |
1170 | * necessary), or creates a new property with that value if it does\r | |
1171 | * not already exist.\r | |
1172 | *\r | |
1173 | * This function may insert or delete data from the blob, and will\r | |
1174 | * therefore change the offsets of some existing nodes.\r | |
1175 | *\r | |
1176 | * returns:\r | |
1177 | * 0, on success\r | |
1178 | * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r | |
1179 | * contain the new property value\r | |
1180 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
1181 | * -FDT_ERR_BADLAYOUT,\r | |
1182 | * -FDT_ERR_BADMAGIC,\r | |
1183 | * -FDT_ERR_BADVERSION,\r | |
1184 | * -FDT_ERR_BADSTATE,\r | |
1185 | * -FDT_ERR_BADSTRUCTURE,\r | |
1186 | * -FDT_ERR_BADLAYOUT,\r | |
1187 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1188 | */\r | |
1189 | static inline int fdt_setprop_u64(void *fdt, int nodeoffset, const char *name,\r | |
1190 | uint64_t val)\r | |
1191 | {\r | |
1192 | val = cpu_to_fdt64(val);\r | |
1193 | return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val));\r | |
1194 | }\r | |
1195 | \r | |
1196 | /**\r | |
1197 | * fdt_setprop_cell - set a property to a single cell value\r | |
1198 | *\r | |
1199 | * This is an alternative name for fdt_setprop_u32()\r | |
1200 | */\r | |
1201 | static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name,\r | |
1202 | uint32_t val)\r | |
1203 | {\r | |
1204 | return fdt_setprop_u32(fdt, nodeoffset, name, val);\r | |
1205 | }\r | |
1206 | \r | |
1207 | /**\r | |
1208 | * fdt_setprop_string - set a property to a string value\r | |
1209 | * @fdt: pointer to the device tree blob\r | |
1210 | * @nodeoffset: offset of the node whose property to change\r | |
1211 | * @name: name of the property to change\r | |
1212 | * @str: string value for the property\r | |
1213 | *\r | |
1214 | * fdt_setprop_string() sets the value of the named property in the\r | |
1215 | * given node to the given string value (using the length of the\r | |
1216 | * string to determine the new length of the property), or creates a\r | |
1217 | * new property with that value if it does not already exist.\r | |
1218 | *\r | |
1219 | * This function may insert or delete data from the blob, and will\r | |
1220 | * therefore change the offsets of some existing nodes.\r | |
1221 | *\r | |
1222 | * returns:\r | |
1223 | * 0, on success\r | |
1224 | * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r | |
1225 | * contain the new property value\r | |
1226 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
1227 | * -FDT_ERR_BADLAYOUT,\r | |
1228 | * -FDT_ERR_BADMAGIC,\r | |
1229 | * -FDT_ERR_BADVERSION,\r | |
1230 | * -FDT_ERR_BADSTATE,\r | |
1231 | * -FDT_ERR_BADSTRUCTURE,\r | |
1232 | * -FDT_ERR_BADLAYOUT,\r | |
1233 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1234 | */\r | |
1235 | #define fdt_setprop_string(fdt, nodeoffset, name, str) \\r | |
1236 | fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)\r | |
1237 | \r | |
1238 | /**\r | |
1239 | * fdt_appendprop - append to or create a property\r | |
1240 | * @fdt: pointer to the device tree blob\r | |
1241 | * @nodeoffset: offset of the node whose property to change\r | |
1242 | * @name: name of the property to append to\r | |
1243 | * @val: pointer to data to append to the property value\r | |
1244 | * @len: length of the data to append to the property value\r | |
1245 | *\r | |
1246 | * fdt_appendprop() appends the value to the named property in the\r | |
1247 | * given node, creating the property if it does not already exist.\r | |
1248 | *\r | |
1249 | * This function may insert data into the blob, and will therefore\r | |
1250 | * change the offsets of some existing nodes.\r | |
1251 | *\r | |
1252 | * returns:\r | |
1253 | * 0, on success\r | |
1254 | * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r | |
1255 | * contain the new property value\r | |
1256 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
1257 | * -FDT_ERR_BADLAYOUT,\r | |
1258 | * -FDT_ERR_BADMAGIC,\r | |
1259 | * -FDT_ERR_BADVERSION,\r | |
1260 | * -FDT_ERR_BADSTATE,\r | |
1261 | * -FDT_ERR_BADSTRUCTURE,\r | |
1262 | * -FDT_ERR_BADLAYOUT,\r | |
1263 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1264 | */\r | |
1265 | int fdt_appendprop(void *fdt, int nodeoffset, const char *name,\r | |
1266 | const void *val, int len);\r | |
1267 | \r | |
1268 | /**\r | |
1269 | * fdt_appendprop_u32 - append a 32-bit integer value to a property\r | |
1270 | * @fdt: pointer to the device tree blob\r | |
1271 | * @nodeoffset: offset of the node whose property to change\r | |
1272 | * @name: name of the property to change\r | |
1273 | * @val: 32-bit integer value to append to the property (native endian)\r | |
1274 | *\r | |
1275 | * fdt_appendprop_u32() appends the given 32-bit integer value\r | |
1276 | * (converting to big-endian if necessary) to the value of the named\r | |
1277 | * property in the given node, or creates a new property with that\r | |
1278 | * value if it does not already exist.\r | |
1279 | *\r | |
1280 | * This function may insert data into the blob, and will therefore\r | |
1281 | * change the offsets of some existing nodes.\r | |
1282 | *\r | |
1283 | * returns:\r | |
1284 | * 0, on success\r | |
1285 | * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r | |
1286 | * contain the new property value\r | |
1287 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
1288 | * -FDT_ERR_BADLAYOUT,\r | |
1289 | * -FDT_ERR_BADMAGIC,\r | |
1290 | * -FDT_ERR_BADVERSION,\r | |
1291 | * -FDT_ERR_BADSTATE,\r | |
1292 | * -FDT_ERR_BADSTRUCTURE,\r | |
1293 | * -FDT_ERR_BADLAYOUT,\r | |
1294 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1295 | */\r | |
1296 | static inline int fdt_appendprop_u32(void *fdt, int nodeoffset,\r | |
1297 | const char *name, uint32_t val)\r | |
1298 | {\r | |
1299 | val = cpu_to_fdt32(val);\r | |
1300 | return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val));\r | |
1301 | }\r | |
1302 | \r | |
1303 | /**\r | |
1304 | * fdt_appendprop_u64 - append a 64-bit integer value to a property\r | |
1305 | * @fdt: pointer to the device tree blob\r | |
1306 | * @nodeoffset: offset of the node whose property to change\r | |
1307 | * @name: name of the property to change\r | |
1308 | * @val: 64-bit integer value to append to the property (native endian)\r | |
1309 | *\r | |
1310 | * fdt_appendprop_u64() appends the given 64-bit integer value\r | |
1311 | * (converting to big-endian if necessary) to the value of the named\r | |
1312 | * property in the given node, or creates a new property with that\r | |
1313 | * value if it does not already exist.\r | |
1314 | *\r | |
1315 | * This function may insert data into the blob, and will therefore\r | |
1316 | * change the offsets of some existing nodes.\r | |
1317 | *\r | |
1318 | * returns:\r | |
1319 | * 0, on success\r | |
1320 | * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r | |
1321 | * contain the new property value\r | |
1322 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
1323 | * -FDT_ERR_BADLAYOUT,\r | |
1324 | * -FDT_ERR_BADMAGIC,\r | |
1325 | * -FDT_ERR_BADVERSION,\r | |
1326 | * -FDT_ERR_BADSTATE,\r | |
1327 | * -FDT_ERR_BADSTRUCTURE,\r | |
1328 | * -FDT_ERR_BADLAYOUT,\r | |
1329 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1330 | */\r | |
1331 | static inline int fdt_appendprop_u64(void *fdt, int nodeoffset,\r | |
1332 | const char *name, uint64_t val)\r | |
1333 | {\r | |
1334 | val = cpu_to_fdt64(val);\r | |
1335 | return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val));\r | |
1336 | }\r | |
1337 | \r | |
1338 | /**\r | |
1339 | * fdt_appendprop_cell - append a single cell value to a property\r | |
1340 | *\r | |
1341 | * This is an alternative name for fdt_appendprop_u32()\r | |
1342 | */\r | |
1343 | static inline int fdt_appendprop_cell(void *fdt, int nodeoffset,\r | |
1344 | const char *name, uint32_t val)\r | |
1345 | {\r | |
1346 | return fdt_appendprop_u32(fdt, nodeoffset, name, val);\r | |
1347 | }\r | |
1348 | \r | |
1349 | /**\r | |
1350 | * fdt_appendprop_string - append a string to a property\r | |
1351 | * @fdt: pointer to the device tree blob\r | |
1352 | * @nodeoffset: offset of the node whose property to change\r | |
1353 | * @name: name of the property to change\r | |
1354 | * @str: string value to append to the property\r | |
1355 | *\r | |
1356 | * fdt_appendprop_string() appends the given string to the value of\r | |
1357 | * the named property in the given node, or creates a new property\r | |
1358 | * with that value if it does not already exist.\r | |
1359 | *\r | |
1360 | * This function may insert data into the blob, and will therefore\r | |
1361 | * change the offsets of some existing nodes.\r | |
1362 | *\r | |
1363 | * returns:\r | |
1364 | * 0, on success\r | |
1365 | * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r | |
1366 | * contain the new property value\r | |
1367 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
1368 | * -FDT_ERR_BADLAYOUT,\r | |
1369 | * -FDT_ERR_BADMAGIC,\r | |
1370 | * -FDT_ERR_BADVERSION,\r | |
1371 | * -FDT_ERR_BADSTATE,\r | |
1372 | * -FDT_ERR_BADSTRUCTURE,\r | |
1373 | * -FDT_ERR_BADLAYOUT,\r | |
1374 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1375 | */\r | |
1376 | #define fdt_appendprop_string(fdt, nodeoffset, name, str) \\r | |
1377 | fdt_appendprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)\r | |
1378 | \r | |
1379 | /**\r | |
1380 | * fdt_delprop - delete a property\r | |
1381 | * @fdt: pointer to the device tree blob\r | |
1382 | * @nodeoffset: offset of the node whose property to nop\r | |
1383 | * @name: name of the property to nop\r | |
1384 | *\r | |
1385 | * fdt_del_property() will delete the given property.\r | |
1386 | *\r | |
1387 | * This function will delete data from the blob, and will therefore\r | |
1388 | * change the offsets of some existing nodes.\r | |
1389 | *\r | |
1390 | * returns:\r | |
1391 | * 0, on success\r | |
1392 | * -FDT_ERR_NOTFOUND, node does not have the named property\r | |
1393 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
1394 | * -FDT_ERR_BADLAYOUT,\r | |
1395 | * -FDT_ERR_BADMAGIC,\r | |
1396 | * -FDT_ERR_BADVERSION,\r | |
1397 | * -FDT_ERR_BADSTATE,\r | |
1398 | * -FDT_ERR_BADSTRUCTURE,\r | |
1399 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1400 | */\r | |
1401 | int fdt_delprop(void *fdt, int nodeoffset, const char *name);\r | |
1402 | \r | |
1403 | /**\r | |
1404 | * fdt_add_subnode_namelen - creates a new node based on substring\r | |
1405 | * @fdt: pointer to the device tree blob\r | |
1406 | * @parentoffset: structure block offset of a node\r | |
1407 | * @name: name of the subnode to locate\r | |
1408 | * @namelen: number of characters of name to consider\r | |
1409 | *\r | |
1410 | * Identical to fdt_add_subnode(), but use only the first namelen\r | |
1411 | * characters of name as the name of the new node. This is useful for\r | |
1412 | * creating subnodes based on a portion of a larger string, such as a\r | |
1413 | * full path.\r | |
1414 | */\r | |
1415 | int fdt_add_subnode_namelen(void *fdt, int parentoffset,\r | |
1416 | const char *name, int namelen);\r | |
1417 | \r | |
1418 | /**\r | |
1419 | * fdt_add_subnode - creates a new node\r | |
1420 | * @fdt: pointer to the device tree blob\r | |
1421 | * @parentoffset: structure block offset of a node\r | |
1422 | * @name: name of the subnode to locate\r | |
1423 | *\r | |
1424 | * fdt_add_subnode() creates a new node as a subnode of the node at\r | |
1425 | * structure block offset parentoffset, with the given name (which\r | |
1426 | * should include the unit address, if any).\r | |
1427 | *\r | |
1428 | * This function will insert data into the blob, and will therefore\r | |
1429 | * change the offsets of some existing nodes.\r | |
1430 | \r | |
1431 | * returns:\r | |
1432 | * structure block offset of the created nodeequested subnode (>=0), on success\r | |
1433 | * -FDT_ERR_NOTFOUND, if the requested subnode does not exist\r | |
1434 | * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag\r | |
1435 | * -FDT_ERR_EXISTS, if the node at parentoffset already has a subnode of\r | |
1436 | * the given name\r | |
1437 | * -FDT_ERR_NOSPACE, if there is insufficient free space in the\r | |
1438 | * blob to contain the new node\r | |
1439 | * -FDT_ERR_NOSPACE\r | |
1440 | * -FDT_ERR_BADLAYOUT\r | |
1441 | * -FDT_ERR_BADMAGIC,\r | |
1442 | * -FDT_ERR_BADVERSION,\r | |
1443 | * -FDT_ERR_BADSTATE,\r | |
1444 | * -FDT_ERR_BADSTRUCTURE,\r | |
1445 | * -FDT_ERR_TRUNCATED, standard meanings.\r | |
1446 | */\r | |
1447 | int fdt_add_subnode(void *fdt, int parentoffset, const char *name);\r | |
1448 | \r | |
1449 | /**\r | |
1450 | * fdt_del_node - delete a node (subtree)\r | |
1451 | * @fdt: pointer to the device tree blob\r | |
1452 | * @nodeoffset: offset of the node to nop\r | |
1453 | *\r | |
1454 | * fdt_del_node() will remove the given node, including all its\r | |
1455 | * subnodes if any, from the blob.\r | |
1456 | *\r | |
1457 | * This function will delete data from the blob, and will therefore\r | |
1458 | * change the offsets of some existing nodes.\r | |
1459 | *\r | |
1460 | * returns:\r | |
1461 | * 0, on success\r | |
1462 | * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r | |
1463 | * -FDT_ERR_BADLAYOUT,\r | |
1464 | * -FDT_ERR_BADMAGIC,\r | |
1465 | * -FDT_ERR_BADVERSION,\r | |
1466 | * -FDT_ERR_BADSTATE,\r | |
1467 | * -FDT_ERR_BADSTRUCTURE,\r | |
1468 | * -FDT_ERR_TRUNCATED, standard meanings\r | |
1469 | */\r | |
1470 | int fdt_del_node(void *fdt, int nodeoffset);\r | |
1471 | \r | |
1472 | /**********************************************************************/\r | |
1473 | /* Debugging / informational functions */\r | |
1474 | /**********************************************************************/\r | |
1475 | \r | |
1476 | const char *fdt_strerror(int errval);\r | |
1477 | \r | |
1478 | #endif /* _LIBFDT_H */\r |