1204431Sraj#ifndef _LIBFDT_H 2204431Sraj#define _LIBFDT_H 3204431Sraj/* 4204431Sraj * libfdt - Flat Device Tree manipulation 5204431Sraj * Copyright (C) 2006 David Gibson, IBM Corporation. 6204431Sraj * 7204431Sraj * libfdt is dual licensed: you can use it either under the terms of 8204431Sraj * the GPL, or the BSD license, at your option. 9204431Sraj * 10204431Sraj * a) This library is free software; you can redistribute it and/or 11204431Sraj * modify it under the terms of the GNU General Public License as 12204431Sraj * published by the Free Software Foundation; either version 2 of the 13204431Sraj * License, or (at your option) any later version. 14204431Sraj * 15204431Sraj * This library is distributed in the hope that it will be useful, 16204431Sraj * but WITHOUT ANY WARRANTY; without even the implied warranty of 17204431Sraj * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18204431Sraj * GNU General Public License for more details. 19204431Sraj * 20204431Sraj * You should have received a copy of the GNU General Public 21204431Sraj * License along with this library; if not, write to the Free 22204431Sraj * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, 23204431Sraj * MA 02110-1301 USA 24204431Sraj * 25204431Sraj * Alternatively, 26204431Sraj * 27204431Sraj * b) Redistribution and use in source and binary forms, with or 28204431Sraj * without modification, are permitted provided that the following 29204431Sraj * conditions are met: 30204431Sraj * 31204431Sraj * 1. Redistributions of source code must retain the above 32204431Sraj * copyright notice, this list of conditions and the following 33204431Sraj * disclaimer. 34204431Sraj * 2. Redistributions in binary form must reproduce the above 35204431Sraj * copyright notice, this list of conditions and the following 36204431Sraj * disclaimer in the documentation and/or other materials 37204431Sraj * provided with the distribution. 38204431Sraj * 39204431Sraj * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 40204431Sraj * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 41204431Sraj * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 42204431Sraj * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 43204431Sraj * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 44204431Sraj * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45204431Sraj * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46204431Sraj * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47204431Sraj * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48204431Sraj * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 49204431Sraj * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 50204431Sraj * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 51204431Sraj * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 52204431Sraj */ 53204431Sraj 54204431Sraj#include <libfdt_env.h> 55204431Sraj#include <fdt.h> 56204431Sraj 57204431Sraj#define FDT_FIRST_SUPPORTED_VERSION 0x10 58204431Sraj#define FDT_LAST_SUPPORTED_VERSION 0x11 59204431Sraj 60204431Sraj/* Error codes: informative error codes */ 61204431Sraj#define FDT_ERR_NOTFOUND 1 62204431Sraj /* FDT_ERR_NOTFOUND: The requested node or property does not exist */ 63204431Sraj#define FDT_ERR_EXISTS 2 64204431Sraj /* FDT_ERR_EXISTS: Attemped to create a node or property which 65204431Sraj * already exists */ 66204431Sraj#define FDT_ERR_NOSPACE 3 67204431Sraj /* FDT_ERR_NOSPACE: Operation needed to expand the device 68204431Sraj * tree, but its buffer did not have sufficient space to 69204431Sraj * contain the expanded tree. Use fdt_open_into() to move the 70204431Sraj * device tree to a buffer with more space. */ 71204431Sraj 72204431Sraj/* Error codes: codes for bad parameters */ 73204431Sraj#define FDT_ERR_BADOFFSET 4 74204431Sraj /* FDT_ERR_BADOFFSET: Function was passed a structure block 75204431Sraj * offset which is out-of-bounds, or which points to an 76204431Sraj * unsuitable part of the structure for the operation. */ 77204431Sraj#define FDT_ERR_BADPATH 5 78204431Sraj /* FDT_ERR_BADPATH: Function was passed a badly formatted path 79204431Sraj * (e.g. missing a leading / for a function which requires an 80204431Sraj * absolute path) */ 81204431Sraj#define FDT_ERR_BADPHANDLE 6 82204431Sraj /* FDT_ERR_BADPHANDLE: Function was passed an invalid phandle 83204431Sraj * value. phandle values of 0 and -1 are not permitted. */ 84204431Sraj#define FDT_ERR_BADSTATE 7 85204431Sraj /* FDT_ERR_BADSTATE: Function was passed an incomplete device 86204431Sraj * tree created by the sequential-write functions, which is 87204431Sraj * not sufficiently complete for the requested operation. */ 88204431Sraj 89204431Sraj/* Error codes: codes for bad device tree blobs */ 90204431Sraj#define FDT_ERR_TRUNCATED 8 91204431Sraj /* FDT_ERR_TRUNCATED: Structure block of the given device tree 92204431Sraj * ends without an FDT_END tag. */ 93204431Sraj#define FDT_ERR_BADMAGIC 9 94204431Sraj /* FDT_ERR_BADMAGIC: Given "device tree" appears not to be a 95204431Sraj * device tree at all - it is missing the flattened device 96204431Sraj * tree magic number. */ 97204431Sraj#define FDT_ERR_BADVERSION 10 98204431Sraj /* FDT_ERR_BADVERSION: Given device tree has a version which 99204431Sraj * can't be handled by the requested operation. For 100204431Sraj * read-write functions, this may mean that fdt_open_into() is 101204431Sraj * required to convert the tree to the expected version. */ 102204431Sraj#define FDT_ERR_BADSTRUCTURE 11 103204431Sraj /* FDT_ERR_BADSTRUCTURE: Given device tree has a corrupt 104204431Sraj * structure block or other serious error (e.g. misnested 105204431Sraj * nodes, or subnodes preceding properties). */ 106204431Sraj#define FDT_ERR_BADLAYOUT 12 107204431Sraj /* FDT_ERR_BADLAYOUT: For read-write functions, the given 108204431Sraj * device tree has it's sub-blocks in an order that the 109204431Sraj * function can't handle (memory reserve map, then structure, 110204431Sraj * then strings). Use fdt_open_into() to reorganize the tree 111204431Sraj * into a form suitable for the read-write operations. */ 112204431Sraj 113204431Sraj/* "Can't happen" error indicating a bug in libfdt */ 114204431Sraj#define FDT_ERR_INTERNAL 13 115204431Sraj /* FDT_ERR_INTERNAL: libfdt has failed an internal assertion. 116204431Sraj * Should never be returned, if it is, it indicates a bug in 117204431Sraj * libfdt itself. */ 118204431Sraj 119204431Sraj#define FDT_ERR_MAX 13 120204431Sraj 121204431Sraj/**********************************************************************/ 122204431Sraj/* Low-level functions (you probably don't need these) */ 123204431Sraj/**********************************************************************/ 124204431Sraj 125204433Srajconst void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen); 126204431Srajstatic inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen) 127204431Sraj{ 128204431Sraj return (void *)(uintptr_t)fdt_offset_ptr(fdt, offset, checklen); 129204431Sraj} 130204431Sraj 131204431Srajuint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset); 132204431Sraj 133204431Sraj/**********************************************************************/ 134204431Sraj/* Traversal functions */ 135204431Sraj/**********************************************************************/ 136204431Sraj 137204431Srajint fdt_next_node(const void *fdt, int offset, int *depth); 138204431Sraj 139204431Sraj/**********************************************************************/ 140204431Sraj/* General functions */ 141204431Sraj/**********************************************************************/ 142204431Sraj 143204431Sraj#define fdt_get_header(fdt, field) \ 144204431Sraj (fdt32_to_cpu(((const struct fdt_header *)(fdt))->field)) 145204431Sraj#define fdt_magic(fdt) (fdt_get_header(fdt, magic)) 146204431Sraj#define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize)) 147204431Sraj#define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct)) 148204431Sraj#define fdt_off_dt_strings(fdt) (fdt_get_header(fdt, off_dt_strings)) 149204431Sraj#define fdt_off_mem_rsvmap(fdt) (fdt_get_header(fdt, off_mem_rsvmap)) 150204431Sraj#define fdt_version(fdt) (fdt_get_header(fdt, version)) 151204431Sraj#define fdt_last_comp_version(fdt) (fdt_get_header(fdt, last_comp_version)) 152204431Sraj#define fdt_boot_cpuid_phys(fdt) (fdt_get_header(fdt, boot_cpuid_phys)) 153204431Sraj#define fdt_size_dt_strings(fdt) (fdt_get_header(fdt, size_dt_strings)) 154204431Sraj#define fdt_size_dt_struct(fdt) (fdt_get_header(fdt, size_dt_struct)) 155204431Sraj 156204431Sraj#define __fdt_set_hdr(name) \ 157204431Sraj static inline void fdt_set_##name(void *fdt, uint32_t val) \ 158204431Sraj { \ 159204433Sraj struct fdt_header *fdth = (struct fdt_header*)fdt; \ 160204431Sraj fdth->name = cpu_to_fdt32(val); \ 161204431Sraj } 162204431Sraj__fdt_set_hdr(magic); 163204431Sraj__fdt_set_hdr(totalsize); 164204431Sraj__fdt_set_hdr(off_dt_struct); 165204431Sraj__fdt_set_hdr(off_dt_strings); 166204431Sraj__fdt_set_hdr(off_mem_rsvmap); 167204431Sraj__fdt_set_hdr(version); 168204431Sraj__fdt_set_hdr(last_comp_version); 169204431Sraj__fdt_set_hdr(boot_cpuid_phys); 170204431Sraj__fdt_set_hdr(size_dt_strings); 171204431Sraj__fdt_set_hdr(size_dt_struct); 172204431Sraj#undef __fdt_set_hdr 173204431Sraj 174204431Sraj/** 175204431Sraj * fdt_check_header - sanity check a device tree or possible device tree 176204431Sraj * @fdt: pointer to data which might be a flattened device tree 177204431Sraj * 178204431Sraj * fdt_check_header() checks that the given buffer contains what 179204431Sraj * appears to be a flattened device tree with sane information in its 180204431Sraj * header. 181204431Sraj * 182204431Sraj * returns: 183204431Sraj * 0, if the buffer appears to contain a valid device tree 184204431Sraj * -FDT_ERR_BADMAGIC, 185204431Sraj * -FDT_ERR_BADVERSION, 186204431Sraj * -FDT_ERR_BADSTATE, standard meanings, as above 187204431Sraj */ 188204431Srajint fdt_check_header(const void *fdt); 189204431Sraj 190204431Sraj/** 191204431Sraj * fdt_move - move a device tree around in memory 192204431Sraj * @fdt: pointer to the device tree to move 193204431Sraj * @buf: pointer to memory where the device is to be moved 194204431Sraj * @bufsize: size of the memory space at buf 195204431Sraj * 196204431Sraj * fdt_move() relocates, if possible, the device tree blob located at 197204431Sraj * fdt to the buffer at buf of size bufsize. The buffer may overlap 198204431Sraj * with the existing device tree blob at fdt. Therefore, 199204431Sraj * fdt_move(fdt, fdt, fdt_totalsize(fdt)) 200204431Sraj * should always succeed. 201204431Sraj * 202204431Sraj * returns: 203204431Sraj * 0, on success 204204431Sraj * -FDT_ERR_NOSPACE, bufsize is insufficient to contain the device tree 205204431Sraj * -FDT_ERR_BADMAGIC, 206204431Sraj * -FDT_ERR_BADVERSION, 207204431Sraj * -FDT_ERR_BADSTATE, standard meanings 208204431Sraj */ 209204431Srajint fdt_move(const void *fdt, void *buf, int bufsize); 210204431Sraj 211204431Sraj/**********************************************************************/ 212204431Sraj/* Read-only functions */ 213204431Sraj/**********************************************************************/ 214204431Sraj 215204431Sraj/** 216204431Sraj * fdt_string - retrieve a string from the strings block of a device tree 217204431Sraj * @fdt: pointer to the device tree blob 218204431Sraj * @stroffset: offset of the string within the strings block (native endian) 219204431Sraj * 220204431Sraj * fdt_string() retrieves a pointer to a single string from the 221204431Sraj * strings block of the device tree blob at fdt. 222204431Sraj * 223204431Sraj * returns: 224204431Sraj * a pointer to the string, on success 225204431Sraj * NULL, if stroffset is out of bounds 226204431Sraj */ 227204431Srajconst char *fdt_string(const void *fdt, int stroffset); 228204431Sraj 229204431Sraj/** 230204431Sraj * fdt_num_mem_rsv - retrieve the number of memory reserve map entries 231204431Sraj * @fdt: pointer to the device tree blob 232204431Sraj * 233204431Sraj * Returns the number of entries in the device tree blob's memory 234204431Sraj * reservation map. This does not include the terminating 0,0 entry 235204431Sraj * or any other (0,0) entries reserved for expansion. 236204431Sraj * 237204431Sraj * returns: 238204431Sraj * the number of entries 239204431Sraj */ 240204431Srajint fdt_num_mem_rsv(const void *fdt); 241204431Sraj 242204431Sraj/** 243204431Sraj * fdt_get_mem_rsv - retrieve one memory reserve map entry 244204431Sraj * @fdt: pointer to the device tree blob 245204431Sraj * @address, @size: pointers to 64-bit variables 246204431Sraj * 247204431Sraj * On success, *address and *size will contain the address and size of 248204431Sraj * the n-th reserve map entry from the device tree blob, in 249204431Sraj * native-endian format. 250204431Sraj * 251204431Sraj * returns: 252204431Sraj * 0, on success 253204431Sraj * -FDT_ERR_BADMAGIC, 254204431Sraj * -FDT_ERR_BADVERSION, 255204431Sraj * -FDT_ERR_BADSTATE, standard meanings 256204431Sraj */ 257204431Srajint fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size); 258204431Sraj 259204431Sraj/** 260204431Sraj * fdt_subnode_offset_namelen - find a subnode based on substring 261204431Sraj * @fdt: pointer to the device tree blob 262204431Sraj * @parentoffset: structure block offset of a node 263204431Sraj * @name: name of the subnode to locate 264204431Sraj * @namelen: number of characters of name to consider 265204431Sraj * 266204431Sraj * Identical to fdt_subnode_offset(), but only examine the first 267204431Sraj * namelen characters of name for matching the subnode name. This is 268204431Sraj * useful for finding subnodes based on a portion of a larger string, 269204431Sraj * such as a full path. 270204431Sraj */ 271204431Srajint fdt_subnode_offset_namelen(const void *fdt, int parentoffset, 272204431Sraj const char *name, int namelen); 273204431Sraj/** 274204431Sraj * fdt_subnode_offset - find a subnode of a given node 275204431Sraj * @fdt: pointer to the device tree blob 276204431Sraj * @parentoffset: structure block offset of a node 277204431Sraj * @name: name of the subnode to locate 278204431Sraj * 279204431Sraj * fdt_subnode_offset() finds a subnode of the node at structure block 280204431Sraj * offset parentoffset with the given name. name may include a unit 281204431Sraj * address, in which case fdt_subnode_offset() will find the subnode 282204431Sraj * with that unit address, or the unit address may be omitted, in 283204431Sraj * which case fdt_subnode_offset() will find an arbitrary subnode 284204431Sraj * whose name excluding unit address matches the given name. 285204431Sraj * 286204431Sraj * returns: 287204431Sraj * structure block offset of the requested subnode (>=0), on success 288204431Sraj * -FDT_ERR_NOTFOUND, if the requested subnode does not exist 289204431Sraj * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag 290204431Sraj * -FDT_ERR_BADMAGIC, 291204431Sraj * -FDT_ERR_BADVERSION, 292204431Sraj * -FDT_ERR_BADSTATE, 293204431Sraj * -FDT_ERR_BADSTRUCTURE, 294204431Sraj * -FDT_ERR_TRUNCATED, standard meanings. 295204431Sraj */ 296204431Srajint fdt_subnode_offset(const void *fdt, int parentoffset, const char *name); 297204431Sraj 298204431Sraj/** 299204431Sraj * fdt_path_offset - find a tree node by its full path 300204431Sraj * @fdt: pointer to the device tree blob 301204431Sraj * @path: full path of the node to locate 302204431Sraj * 303204431Sraj * fdt_path_offset() finds a node of a given path in the device tree. 304204431Sraj * Each path component may omit the unit address portion, but the 305204431Sraj * results of this are undefined if any such path component is 306204431Sraj * ambiguous (that is if there are multiple nodes at the relevant 307204431Sraj * level matching the given component, differentiated only by unit 308204431Sraj * address). 309204431Sraj * 310204431Sraj * returns: 311204431Sraj * structure block offset of the node with the requested path (>=0), on success 312204431Sraj * -FDT_ERR_BADPATH, given path does not begin with '/' or is invalid 313204431Sraj * -FDT_ERR_NOTFOUND, if the requested node does not exist 314204431Sraj * -FDT_ERR_BADMAGIC, 315204431Sraj * -FDT_ERR_BADVERSION, 316204431Sraj * -FDT_ERR_BADSTATE, 317204431Sraj * -FDT_ERR_BADSTRUCTURE, 318204431Sraj * -FDT_ERR_TRUNCATED, standard meanings. 319204431Sraj */ 320204431Srajint fdt_path_offset(const void *fdt, const char *path); 321204431Sraj 322204431Sraj/** 323204431Sraj * fdt_get_name - retrieve the name of a given node 324204431Sraj * @fdt: pointer to the device tree blob 325204431Sraj * @nodeoffset: structure block offset of the starting node 326204431Sraj * @lenp: pointer to an integer variable (will be overwritten) or NULL 327204431Sraj * 328204431Sraj * fdt_get_name() retrieves the name (including unit address) of the 329204431Sraj * device tree node at structure block offset nodeoffset. If lenp is 330204431Sraj * non-NULL, the length of this name is also returned, in the integer 331204431Sraj * pointed to by lenp. 332204431Sraj * 333204431Sraj * returns: 334204431Sraj * pointer to the node's name, on success 335204431Sraj * If lenp is non-NULL, *lenp contains the length of that name (>=0) 336204431Sraj * NULL, on error 337204431Sraj * if lenp is non-NULL *lenp contains an error code (<0): 338204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 339204431Sraj * -FDT_ERR_BADMAGIC, 340204431Sraj * -FDT_ERR_BADVERSION, 341204431Sraj * -FDT_ERR_BADSTATE, standard meanings 342204431Sraj */ 343204431Srajconst char *fdt_get_name(const void *fdt, int nodeoffset, int *lenp); 344204431Sraj 345204431Sraj/** 346238742Simp * fdt_first_property_offset - find the offset of a node's first property 347238742Simp * @fdt: pointer to the device tree blob 348238742Simp * @nodeoffset: structure block offset of a node 349238742Simp * 350238742Simp * fdt_first_property_offset() finds the first property of the node at 351238742Simp * the given structure block offset. 352238742Simp * 353238742Simp * returns: 354238742Simp * structure block offset of the property (>=0), on success 355238742Simp * -FDT_ERR_NOTFOUND, if the requested node has no properties 356238742Simp * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_BEGIN_NODE tag 357238742Simp * -FDT_ERR_BADMAGIC, 358238742Simp * -FDT_ERR_BADVERSION, 359238742Simp * -FDT_ERR_BADSTATE, 360238742Simp * -FDT_ERR_BADSTRUCTURE, 361238742Simp * -FDT_ERR_TRUNCATED, standard meanings. 362238742Simp */ 363238742Simpint fdt_first_property_offset(const void *fdt, int nodeoffset); 364238742Simp 365238742Simp/** 366238742Simp * fdt_next_property_offset - step through a node's properties 367238742Simp * @fdt: pointer to the device tree blob 368238742Simp * @offset: structure block offset of a property 369238742Simp * 370238742Simp * fdt_next_property_offset() finds the property immediately after the 371238742Simp * one at the given structure block offset. This will be a property 372238742Simp * of the same node as the given property. 373238742Simp * 374238742Simp * returns: 375238742Simp * structure block offset of the next property (>=0), on success 376238742Simp * -FDT_ERR_NOTFOUND, if the given property is the last in its node 377238742Simp * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_PROP tag 378238742Simp * -FDT_ERR_BADMAGIC, 379238742Simp * -FDT_ERR_BADVERSION, 380238742Simp * -FDT_ERR_BADSTATE, 381238742Simp * -FDT_ERR_BADSTRUCTURE, 382238742Simp * -FDT_ERR_TRUNCATED, standard meanings. 383238742Simp */ 384238742Simpint fdt_next_property_offset(const void *fdt, int offset); 385238742Simp 386238742Simp/** 387238742Simp * fdt_get_property_by_offset - retrieve the property at a given offset 388238742Simp * @fdt: pointer to the device tree blob 389238742Simp * @offset: offset of the property to retrieve 390238742Simp * @lenp: pointer to an integer variable (will be overwritten) or NULL 391238742Simp * 392238742Simp * fdt_get_property_by_offset() retrieves a pointer to the 393238742Simp * fdt_property structure within the device tree blob at the given 394238742Simp * offset. If lenp is non-NULL, the length of the property value is 395238742Simp * also returned, in the integer pointed to by lenp. 396238742Simp * 397238742Simp * returns: 398238742Simp * pointer to the structure representing the property 399238742Simp * if lenp is non-NULL, *lenp contains the length of the property 400238742Simp * value (>=0) 401238742Simp * NULL, on error 402238742Simp * if lenp is non-NULL, *lenp contains an error code (<0): 403238742Simp * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag 404238742Simp * -FDT_ERR_BADMAGIC, 405238742Simp * -FDT_ERR_BADVERSION, 406238742Simp * -FDT_ERR_BADSTATE, 407238742Simp * -FDT_ERR_BADSTRUCTURE, 408238742Simp * -FDT_ERR_TRUNCATED, standard meanings 409238742Simp */ 410238742Simpconst struct fdt_property *fdt_get_property_by_offset(const void *fdt, 411238742Simp int offset, 412238742Simp int *lenp); 413238742Simp 414238742Simp/** 415204433Sraj * fdt_get_property_namelen - find a property based on substring 416204433Sraj * @fdt: pointer to the device tree blob 417204433Sraj * @nodeoffset: offset of the node whose property to find 418204433Sraj * @name: name of the property to find 419204433Sraj * @namelen: number of characters of name to consider 420204433Sraj * @lenp: pointer to an integer variable (will be overwritten) or NULL 421204433Sraj * 422204433Sraj * Identical to fdt_get_property_namelen(), but only examine the first 423204433Sraj * namelen characters of name for matching the property name. 424204433Sraj */ 425204433Srajconst struct fdt_property *fdt_get_property_namelen(const void *fdt, 426204433Sraj int nodeoffset, 427204433Sraj const char *name, 428204433Sraj int namelen, int *lenp); 429204433Sraj 430204433Sraj/** 431204431Sraj * fdt_get_property - find a given property in a given node 432204431Sraj * @fdt: pointer to the device tree blob 433204431Sraj * @nodeoffset: offset of the node whose property to find 434204431Sraj * @name: name of the property to find 435204431Sraj * @lenp: pointer to an integer variable (will be overwritten) or NULL 436204431Sraj * 437204431Sraj * fdt_get_property() retrieves a pointer to the fdt_property 438204431Sraj * structure within the device tree blob corresponding to the property 439204431Sraj * named 'name' of the node at offset nodeoffset. If lenp is 440204431Sraj * non-NULL, the length of the property value is also returned, in the 441204431Sraj * integer pointed to by lenp. 442204431Sraj * 443204431Sraj * returns: 444204431Sraj * pointer to the structure representing the property 445204431Sraj * if lenp is non-NULL, *lenp contains the length of the property 446204431Sraj * value (>=0) 447204431Sraj * NULL, on error 448204431Sraj * if lenp is non-NULL, *lenp contains an error code (<0): 449204431Sraj * -FDT_ERR_NOTFOUND, node does not have named property 450204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 451204431Sraj * -FDT_ERR_BADMAGIC, 452204431Sraj * -FDT_ERR_BADVERSION, 453204431Sraj * -FDT_ERR_BADSTATE, 454204431Sraj * -FDT_ERR_BADSTRUCTURE, 455204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 456204431Sraj */ 457204431Srajconst struct fdt_property *fdt_get_property(const void *fdt, int nodeoffset, 458204431Sraj const char *name, int *lenp); 459204431Srajstatic inline struct fdt_property *fdt_get_property_w(void *fdt, int nodeoffset, 460204431Sraj const char *name, 461204431Sraj int *lenp) 462204431Sraj{ 463204431Sraj return (struct fdt_property *)(uintptr_t) 464204431Sraj fdt_get_property(fdt, nodeoffset, name, lenp); 465204431Sraj} 466204431Sraj 467204431Sraj/** 468238742Simp * fdt_getprop_by_offset - retrieve the value of a property at a given offset 469238742Simp * @fdt: pointer to the device tree blob 470238742Simp * @ffset: offset of the property to read 471238742Simp * @namep: pointer to a string variable (will be overwritten) or NULL 472238742Simp * @lenp: pointer to an integer variable (will be overwritten) or NULL 473238742Simp * 474238742Simp * fdt_getprop_by_offset() retrieves a pointer to the value of the 475238742Simp * property at structure block offset 'offset' (this will be a pointer 476238742Simp * to within the device blob itself, not a copy of the value). If 477238742Simp * lenp is non-NULL, the length of the property value is also 478238742Simp * returned, in the integer pointed to by lenp. If namep is non-NULL, 479238742Simp * the property's namne will also be returned in the char * pointed to 480238742Simp * by namep (this will be a pointer to within the device tree's string 481238742Simp * block, not a new copy of the name). 482238742Simp * 483238742Simp * returns: 484238742Simp * pointer to the property's value 485238742Simp * if lenp is non-NULL, *lenp contains the length of the property 486238742Simp * value (>=0) 487238742Simp * if namep is non-NULL *namep contiains a pointer to the property 488238742Simp * name. 489238742Simp * NULL, on error 490238742Simp * if lenp is non-NULL, *lenp contains an error code (<0): 491238742Simp * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag 492238742Simp * -FDT_ERR_BADMAGIC, 493238742Simp * -FDT_ERR_BADVERSION, 494238742Simp * -FDT_ERR_BADSTATE, 495238742Simp * -FDT_ERR_BADSTRUCTURE, 496238742Simp * -FDT_ERR_TRUNCATED, standard meanings 497238742Simp */ 498238742Simpconst void *fdt_getprop_by_offset(const void *fdt, int offset, 499238742Simp const char **namep, int *lenp); 500238742Simp 501238742Simp/** 502204433Sraj * fdt_getprop_namelen - get property value based on substring 503204433Sraj * @fdt: pointer to the device tree blob 504204433Sraj * @nodeoffset: offset of the node whose property to find 505204433Sraj * @name: name of the property to find 506204433Sraj * @namelen: number of characters of name to consider 507204433Sraj * @lenp: pointer to an integer variable (will be overwritten) or NULL 508204433Sraj * 509204433Sraj * Identical to fdt_getprop(), but only examine the first namelen 510204433Sraj * characters of name for matching the property name. 511204433Sraj */ 512204433Srajconst void *fdt_getprop_namelen(const void *fdt, int nodeoffset, 513204433Sraj const char *name, int namelen, int *lenp); 514204433Sraj 515204433Sraj/** 516204431Sraj * fdt_getprop - retrieve the value of a given property 517204431Sraj * @fdt: pointer to the device tree blob 518204431Sraj * @nodeoffset: offset of the node whose property to find 519204431Sraj * @name: name of the property to find 520204431Sraj * @lenp: pointer to an integer variable (will be overwritten) or NULL 521204431Sraj * 522204431Sraj * fdt_getprop() retrieves a pointer to the value of the property 523204431Sraj * named 'name' of the node at offset nodeoffset (this will be a 524204431Sraj * pointer to within the device blob itself, not a copy of the value). 525204431Sraj * If lenp is non-NULL, the length of the property value is also 526204431Sraj * returned, in the integer pointed to by lenp. 527204431Sraj * 528204431Sraj * returns: 529204431Sraj * pointer to the property's value 530204431Sraj * if lenp is non-NULL, *lenp contains the length of the property 531204431Sraj * value (>=0) 532204431Sraj * NULL, on error 533204431Sraj * if lenp is non-NULL, *lenp contains an error code (<0): 534204431Sraj * -FDT_ERR_NOTFOUND, node does not have named property 535204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 536204431Sraj * -FDT_ERR_BADMAGIC, 537204431Sraj * -FDT_ERR_BADVERSION, 538204431Sraj * -FDT_ERR_BADSTATE, 539204431Sraj * -FDT_ERR_BADSTRUCTURE, 540204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 541204431Sraj */ 542204431Srajconst void *fdt_getprop(const void *fdt, int nodeoffset, 543204431Sraj const char *name, int *lenp); 544204431Srajstatic inline void *fdt_getprop_w(void *fdt, int nodeoffset, 545204431Sraj const char *name, int *lenp) 546204431Sraj{ 547204431Sraj return (void *)(uintptr_t)fdt_getprop(fdt, nodeoffset, name, lenp); 548204431Sraj} 549204431Sraj 550204431Sraj/** 551204431Sraj * fdt_get_phandle - retrieve the phandle of a given node 552204431Sraj * @fdt: pointer to the device tree blob 553204431Sraj * @nodeoffset: structure block offset of the node 554204431Sraj * 555204431Sraj * fdt_get_phandle() retrieves the phandle of the device tree node at 556204431Sraj * structure block offset nodeoffset. 557204431Sraj * 558204431Sraj * returns: 559204431Sraj * the phandle of the node at nodeoffset, on success (!= 0, != -1) 560204431Sraj * 0, if the node has no phandle, or another error occurs 561204431Sraj */ 562204431Srajuint32_t fdt_get_phandle(const void *fdt, int nodeoffset); 563204431Sraj 564204431Sraj/** 565204433Sraj * fdt_get_alias_namelen - get alias based on substring 566204433Sraj * @fdt: pointer to the device tree blob 567204433Sraj * @name: name of the alias th look up 568204433Sraj * @namelen: number of characters of name to consider 569204433Sraj * 570204433Sraj * Identical to fdt_get_alias(), but only examine the first namelen 571204433Sraj * characters of name for matching the alias name. 572204433Sraj */ 573204433Srajconst char *fdt_get_alias_namelen(const void *fdt, 574204433Sraj const char *name, int namelen); 575204433Sraj 576204433Sraj/** 577204433Sraj * fdt_get_alias - retreive the path referenced by a given alias 578204433Sraj * @fdt: pointer to the device tree blob 579204433Sraj * @name: name of the alias th look up 580204433Sraj * 581204433Sraj * fdt_get_alias() retrieves the value of a given alias. That is, the 582204433Sraj * value of the property named 'name' in the node /aliases. 583204433Sraj * 584204433Sraj * returns: 585204433Sraj * a pointer to the expansion of the alias named 'name', of it exists 586204433Sraj * NULL, if the given alias or the /aliases node does not exist 587204433Sraj */ 588204433Srajconst char *fdt_get_alias(const void *fdt, const char *name); 589204433Sraj 590204433Sraj/** 591204431Sraj * fdt_get_path - determine the full path of a node 592204431Sraj * @fdt: pointer to the device tree blob 593204431Sraj * @nodeoffset: offset of the node whose path to find 594204431Sraj * @buf: character buffer to contain the returned path (will be overwritten) 595204431Sraj * @buflen: size of the character buffer at buf 596204431Sraj * 597204431Sraj * fdt_get_path() computes the full path of the node at offset 598204431Sraj * nodeoffset, and records that path in the buffer at buf. 599204431Sraj * 600204431Sraj * NOTE: This function is expensive, as it must scan the device tree 601204431Sraj * structure from the start to nodeoffset. 602204431Sraj * 603204431Sraj * returns: 604204431Sraj * 0, on success 605204431Sraj * buf contains the absolute path of the node at 606204431Sraj * nodeoffset, as a NUL-terminated string. 607204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag 608204431Sraj * -FDT_ERR_NOSPACE, the path of the given node is longer than (bufsize-1) 609204431Sraj * characters and will not fit in the given buffer. 610204431Sraj * -FDT_ERR_BADMAGIC, 611204431Sraj * -FDT_ERR_BADVERSION, 612204431Sraj * -FDT_ERR_BADSTATE, 613204431Sraj * -FDT_ERR_BADSTRUCTURE, standard meanings 614204431Sraj */ 615204431Srajint fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen); 616204431Sraj 617204431Sraj/** 618204431Sraj * fdt_supernode_atdepth_offset - find a specific ancestor of a node 619204431Sraj * @fdt: pointer to the device tree blob 620204431Sraj * @nodeoffset: offset of the node whose parent to find 621204431Sraj * @supernodedepth: depth of the ancestor to find 622204431Sraj * @nodedepth: pointer to an integer variable (will be overwritten) or NULL 623204431Sraj * 624204431Sraj * fdt_supernode_atdepth_offset() finds an ancestor of the given node 625204431Sraj * at a specific depth from the root (where the root itself has depth 626204431Sraj * 0, its immediate subnodes depth 1 and so forth). So 627204431Sraj * fdt_supernode_atdepth_offset(fdt, nodeoffset, 0, NULL); 628204431Sraj * will always return 0, the offset of the root node. If the node at 629204431Sraj * nodeoffset has depth D, then: 630204431Sraj * fdt_supernode_atdepth_offset(fdt, nodeoffset, D, NULL); 631204431Sraj * will return nodeoffset itself. 632204431Sraj * 633204431Sraj * NOTE: This function is expensive, as it must scan the device tree 634204431Sraj * structure from the start to nodeoffset. 635204431Sraj * 636204431Sraj * returns: 637204431Sraj 638204431Sraj * structure block offset of the node at node offset's ancestor 639204431Sraj * of depth supernodedepth (>=0), on success 640204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag 641204431Sraj* -FDT_ERR_NOTFOUND, supernodedepth was greater than the depth of nodeoffset 642204431Sraj * -FDT_ERR_BADMAGIC, 643204431Sraj * -FDT_ERR_BADVERSION, 644204431Sraj * -FDT_ERR_BADSTATE, 645204431Sraj * -FDT_ERR_BADSTRUCTURE, standard meanings 646204431Sraj */ 647204431Srajint fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset, 648204431Sraj int supernodedepth, int *nodedepth); 649204431Sraj 650204431Sraj/** 651204431Sraj * fdt_node_depth - find the depth of a given node 652204431Sraj * @fdt: pointer to the device tree blob 653204431Sraj * @nodeoffset: offset of the node whose parent to find 654204431Sraj * 655204431Sraj * fdt_node_depth() finds the depth of a given node. The root node 656204431Sraj * has depth 0, its immediate subnodes depth 1 and so forth. 657204431Sraj * 658204431Sraj * NOTE: This function is expensive, as it must scan the device tree 659204431Sraj * structure from the start to nodeoffset. 660204431Sraj * 661204431Sraj * returns: 662204431Sraj * depth of the node at nodeoffset (>=0), on success 663204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag 664204431Sraj * -FDT_ERR_BADMAGIC, 665204431Sraj * -FDT_ERR_BADVERSION, 666204431Sraj * -FDT_ERR_BADSTATE, 667204431Sraj * -FDT_ERR_BADSTRUCTURE, standard meanings 668204431Sraj */ 669204431Srajint fdt_node_depth(const void *fdt, int nodeoffset); 670204431Sraj 671204431Sraj/** 672204431Sraj * fdt_parent_offset - find the parent of a given node 673204431Sraj * @fdt: pointer to the device tree blob 674204431Sraj * @nodeoffset: offset of the node whose parent to find 675204431Sraj * 676204431Sraj * fdt_parent_offset() locates the parent node of a given node (that 677204431Sraj * is, it finds the offset of the node which contains the node at 678204431Sraj * nodeoffset as a subnode). 679204431Sraj * 680204431Sraj * NOTE: This function is expensive, as it must scan the device tree 681204431Sraj * structure from the start to nodeoffset, *twice*. 682204431Sraj * 683204431Sraj * returns: 684204431Sraj * structure block offset of the parent of the node at nodeoffset 685204431Sraj * (>=0), on success 686204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag 687204431Sraj * -FDT_ERR_BADMAGIC, 688204431Sraj * -FDT_ERR_BADVERSION, 689204431Sraj * -FDT_ERR_BADSTATE, 690204431Sraj * -FDT_ERR_BADSTRUCTURE, standard meanings 691204431Sraj */ 692204431Srajint fdt_parent_offset(const void *fdt, int nodeoffset); 693204431Sraj 694204431Sraj/** 695204431Sraj * fdt_node_offset_by_prop_value - find nodes with a given property value 696204431Sraj * @fdt: pointer to the device tree blob 697204431Sraj * @startoffset: only find nodes after this offset 698204431Sraj * @propname: property name to check 699204431Sraj * @propval: property value to search for 700204431Sraj * @proplen: length of the value in propval 701204431Sraj * 702204431Sraj * fdt_node_offset_by_prop_value() returns the offset of the first 703204431Sraj * node after startoffset, which has a property named propname whose 704204431Sraj * value is of length proplen and has value equal to propval; or if 705204431Sraj * startoffset is -1, the very first such node in the tree. 706204431Sraj * 707204431Sraj * To iterate through all nodes matching the criterion, the following 708204431Sraj * idiom can be used: 709204431Sraj * offset = fdt_node_offset_by_prop_value(fdt, -1, propname, 710204431Sraj * propval, proplen); 711204431Sraj * while (offset != -FDT_ERR_NOTFOUND) { 712204431Sraj * // other code here 713204431Sraj * offset = fdt_node_offset_by_prop_value(fdt, offset, propname, 714204431Sraj * propval, proplen); 715204431Sraj * } 716204431Sraj * 717204431Sraj * Note the -1 in the first call to the function, if 0 is used here 718204431Sraj * instead, the function will never locate the root node, even if it 719204431Sraj * matches the criterion. 720204431Sraj * 721204431Sraj * returns: 722204431Sraj * structure block offset of the located node (>= 0, >startoffset), 723204431Sraj * on success 724204431Sraj * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the 725204431Sraj * tree after startoffset 726204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag 727204431Sraj * -FDT_ERR_BADMAGIC, 728204431Sraj * -FDT_ERR_BADVERSION, 729204431Sraj * -FDT_ERR_BADSTATE, 730204431Sraj * -FDT_ERR_BADSTRUCTURE, standard meanings 731204431Sraj */ 732204431Srajint fdt_node_offset_by_prop_value(const void *fdt, int startoffset, 733204431Sraj const char *propname, 734204431Sraj const void *propval, int proplen); 735204431Sraj 736204431Sraj/** 737204431Sraj * fdt_node_offset_by_phandle - find the node with a given phandle 738204431Sraj * @fdt: pointer to the device tree blob 739204431Sraj * @phandle: phandle value 740204431Sraj * 741204431Sraj * fdt_node_offset_by_phandle() returns the offset of the node 742204431Sraj * which has the given phandle value. If there is more than one node 743204431Sraj * in the tree with the given phandle (an invalid tree), results are 744204431Sraj * undefined. 745204431Sraj * 746204431Sraj * returns: 747204431Sraj * structure block offset of the located node (>= 0), on success 748204431Sraj * -FDT_ERR_NOTFOUND, no node with that phandle exists 749204431Sraj * -FDT_ERR_BADPHANDLE, given phandle value was invalid (0 or -1) 750204431Sraj * -FDT_ERR_BADMAGIC, 751204431Sraj * -FDT_ERR_BADVERSION, 752204431Sraj * -FDT_ERR_BADSTATE, 753204431Sraj * -FDT_ERR_BADSTRUCTURE, standard meanings 754204431Sraj */ 755204431Srajint fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle); 756204431Sraj 757204431Sraj/** 758204431Sraj * fdt_node_check_compatible: check a node's compatible property 759204431Sraj * @fdt: pointer to the device tree blob 760204431Sraj * @nodeoffset: offset of a tree node 761204431Sraj * @compatible: string to match against 762204431Sraj * 763204431Sraj * 764204431Sraj * fdt_node_check_compatible() returns 0 if the given node contains a 765204431Sraj * 'compatible' property with the given string as one of its elements, 766204431Sraj * it returns non-zero otherwise, or on error. 767204431Sraj * 768204431Sraj * returns: 769204431Sraj * 0, if the node has a 'compatible' property listing the given string 770204431Sraj * 1, if the node has a 'compatible' property, but it does not list 771204431Sraj * the given string 772204431Sraj * -FDT_ERR_NOTFOUND, if the given node has no 'compatible' property 773204431Sraj * -FDT_ERR_BADOFFSET, if nodeoffset does not refer to a BEGIN_NODE tag 774204431Sraj * -FDT_ERR_BADMAGIC, 775204431Sraj * -FDT_ERR_BADVERSION, 776204431Sraj * -FDT_ERR_BADSTATE, 777204431Sraj * -FDT_ERR_BADSTRUCTURE, standard meanings 778204431Sraj */ 779204431Srajint fdt_node_check_compatible(const void *fdt, int nodeoffset, 780204431Sraj const char *compatible); 781204431Sraj 782204431Sraj/** 783204431Sraj * fdt_node_offset_by_compatible - find nodes with a given 'compatible' value 784204431Sraj * @fdt: pointer to the device tree blob 785204431Sraj * @startoffset: only find nodes after this offset 786204431Sraj * @compatible: 'compatible' string to match against 787204431Sraj * 788204431Sraj * fdt_node_offset_by_compatible() returns the offset of the first 789204431Sraj * node after startoffset, which has a 'compatible' property which 790204431Sraj * lists the given compatible string; or if startoffset is -1, the 791204431Sraj * very first such node in the tree. 792204431Sraj * 793204431Sraj * To iterate through all nodes matching the criterion, the following 794204431Sraj * idiom can be used: 795204431Sraj * offset = fdt_node_offset_by_compatible(fdt, -1, compatible); 796204431Sraj * while (offset != -FDT_ERR_NOTFOUND) { 797204431Sraj * // other code here 798204431Sraj * offset = fdt_node_offset_by_compatible(fdt, offset, compatible); 799204431Sraj * } 800204431Sraj * 801204431Sraj * Note the -1 in the first call to the function, if 0 is used here 802204431Sraj * instead, the function will never locate the root node, even if it 803204431Sraj * matches the criterion. 804204431Sraj * 805204431Sraj * returns: 806204431Sraj * structure block offset of the located node (>= 0, >startoffset), 807204431Sraj * on success 808204431Sraj * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the 809204431Sraj * tree after startoffset 810204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag 811204431Sraj * -FDT_ERR_BADMAGIC, 812204431Sraj * -FDT_ERR_BADVERSION, 813204431Sraj * -FDT_ERR_BADSTATE, 814204431Sraj * -FDT_ERR_BADSTRUCTURE, standard meanings 815204431Sraj */ 816204431Srajint fdt_node_offset_by_compatible(const void *fdt, int startoffset, 817204431Sraj const char *compatible); 818204431Sraj 819204431Sraj/**********************************************************************/ 820204431Sraj/* Write-in-place functions */ 821204431Sraj/**********************************************************************/ 822204431Sraj 823204431Sraj/** 824204431Sraj * fdt_setprop_inplace - change a property's value, but not its size 825204431Sraj * @fdt: pointer to the device tree blob 826204431Sraj * @nodeoffset: offset of the node whose property to change 827204431Sraj * @name: name of the property to change 828204431Sraj * @val: pointer to data to replace the property value with 829204431Sraj * @len: length of the property value 830204431Sraj * 831204431Sraj * fdt_setprop_inplace() replaces the value of a given property with 832204431Sraj * the data in val, of length len. This function cannot change the 833204431Sraj * size of a property, and so will only work if len is equal to the 834204431Sraj * current length of the property. 835204431Sraj * 836204431Sraj * This function will alter only the bytes in the blob which contain 837204431Sraj * the given property value, and will not alter or move any other part 838204431Sraj * of the tree. 839204431Sraj * 840204431Sraj * returns: 841204431Sraj * 0, on success 842204431Sraj * -FDT_ERR_NOSPACE, if len is not equal to the property's current length 843204431Sraj * -FDT_ERR_NOTFOUND, node does not have the named property 844204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 845204431Sraj * -FDT_ERR_BADMAGIC, 846204431Sraj * -FDT_ERR_BADVERSION, 847204431Sraj * -FDT_ERR_BADSTATE, 848204431Sraj * -FDT_ERR_BADSTRUCTURE, 849204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 850204431Sraj */ 851204431Srajint fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name, 852204431Sraj const void *val, int len); 853204431Sraj 854204431Sraj/** 855238742Simp * fdt_setprop_inplace_u32 - change the value of a 32-bit integer property 856204431Sraj * @fdt: pointer to the device tree blob 857204431Sraj * @nodeoffset: offset of the node whose property to change 858204431Sraj * @name: name of the property to change 859238742Simp * @val: 32-bit integer value to replace the property with 860204431Sraj * 861238742Simp * fdt_setprop_inplace_u32() replaces the value of a given property 862238742Simp * with the 32-bit integer value in val, converting val to big-endian 863238742Simp * if necessary. This function cannot change the size of a property, 864238742Simp * and so will only work if the property already exists and has length 865238742Simp * 4. 866204431Sraj * 867204431Sraj * This function will alter only the bytes in the blob which contain 868204431Sraj * the given property value, and will not alter or move any other part 869204431Sraj * of the tree. 870204431Sraj * 871204431Sraj * returns: 872204431Sraj * 0, on success 873204431Sraj * -FDT_ERR_NOSPACE, if the property's length is not equal to 4 874238742Simp * -FDT_ERR_NOTFOUND, node does not have the named property 875204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 876204431Sraj * -FDT_ERR_BADMAGIC, 877204431Sraj * -FDT_ERR_BADVERSION, 878204431Sraj * -FDT_ERR_BADSTATE, 879204431Sraj * -FDT_ERR_BADSTRUCTURE, 880204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 881204431Sraj */ 882238742Simpstatic inline int fdt_setprop_inplace_u32(void *fdt, int nodeoffset, 883238742Simp const char *name, uint32_t val) 884204431Sraj{ 885204431Sraj val = cpu_to_fdt32(val); 886204431Sraj return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val)); 887204431Sraj} 888204431Sraj 889204431Sraj/** 890238742Simp * fdt_setprop_inplace_u64 - change the value of a 64-bit integer property 891238742Simp * @fdt: pointer to the device tree blob 892238742Simp * @nodeoffset: offset of the node whose property to change 893238742Simp * @name: name of the property to change 894238742Simp * @val: 64-bit integer value to replace the property with 895238742Simp * 896238742Simp * fdt_setprop_inplace_u64() replaces the value of a given property 897238742Simp * with the 64-bit integer value in val, converting val to big-endian 898238742Simp * if necessary. This function cannot change the size of a property, 899238742Simp * and so will only work if the property already exists and has length 900238742Simp * 8. 901238742Simp * 902238742Simp * This function will alter only the bytes in the blob which contain 903238742Simp * the given property value, and will not alter or move any other part 904238742Simp * of the tree. 905238742Simp * 906238742Simp * returns: 907238742Simp * 0, on success 908238742Simp * -FDT_ERR_NOSPACE, if the property's length is not equal to 8 909238742Simp * -FDT_ERR_NOTFOUND, node does not have the named property 910238742Simp * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 911238742Simp * -FDT_ERR_BADMAGIC, 912238742Simp * -FDT_ERR_BADVERSION, 913238742Simp * -FDT_ERR_BADSTATE, 914238742Simp * -FDT_ERR_BADSTRUCTURE, 915238742Simp * -FDT_ERR_TRUNCATED, standard meanings 916238742Simp */ 917238742Simpstatic inline int fdt_setprop_inplace_u64(void *fdt, int nodeoffset, 918238742Simp const char *name, uint64_t val) 919238742Simp{ 920238742Simp val = cpu_to_fdt64(val); 921238742Simp return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val)); 922238742Simp} 923238742Simp 924238742Simp/** 925238742Simp * fdt_setprop_inplace_cell - change the value of a single-cell property 926238742Simp * 927238742Simp * This is an alternative name for fdt_setprop_inplace_u32() 928238742Simp */ 929238742Simpstatic inline int fdt_setprop_inplace_cell(void *fdt, int nodeoffset, 930238742Simp const char *name, uint32_t val) 931238742Simp{ 932238742Simp return fdt_setprop_inplace_u32(fdt, nodeoffset, name, val); 933238742Simp} 934238742Simp 935238742Simp/** 936204431Sraj * fdt_nop_property - replace a property with nop tags 937204431Sraj * @fdt: pointer to the device tree blob 938204431Sraj * @nodeoffset: offset of the node whose property to nop 939204431Sraj * @name: name of the property to nop 940204431Sraj * 941204431Sraj * fdt_nop_property() will replace a given property's representation 942204431Sraj * in the blob with FDT_NOP tags, effectively removing it from the 943204431Sraj * tree. 944204431Sraj * 945204431Sraj * This function will alter only the bytes in the blob which contain 946204431Sraj * the property, and will not alter or move any other part of the 947204431Sraj * tree. 948204431Sraj * 949204431Sraj * returns: 950204431Sraj * 0, on success 951204431Sraj * -FDT_ERR_NOTFOUND, node does not have the named property 952204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 953204431Sraj * -FDT_ERR_BADMAGIC, 954204431Sraj * -FDT_ERR_BADVERSION, 955204431Sraj * -FDT_ERR_BADSTATE, 956204431Sraj * -FDT_ERR_BADSTRUCTURE, 957204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 958204431Sraj */ 959204431Srajint fdt_nop_property(void *fdt, int nodeoffset, const char *name); 960204431Sraj 961204431Sraj/** 962204431Sraj * fdt_nop_node - replace a node (subtree) with nop tags 963204431Sraj * @fdt: pointer to the device tree blob 964204431Sraj * @nodeoffset: offset of the node to nop 965204431Sraj * 966204431Sraj * fdt_nop_node() will replace a given node's representation in the 967204431Sraj * blob, including all its subnodes, if any, with FDT_NOP tags, 968204431Sraj * effectively removing it from the tree. 969204431Sraj * 970204431Sraj * This function will alter only the bytes in the blob which contain 971204431Sraj * the node and its properties and subnodes, and will not alter or 972204431Sraj * move any other part of the tree. 973204431Sraj * 974204431Sraj * returns: 975204431Sraj * 0, on success 976204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 977204431Sraj * -FDT_ERR_BADMAGIC, 978204431Sraj * -FDT_ERR_BADVERSION, 979204431Sraj * -FDT_ERR_BADSTATE, 980204431Sraj * -FDT_ERR_BADSTRUCTURE, 981204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 982204431Sraj */ 983204431Srajint fdt_nop_node(void *fdt, int nodeoffset); 984204431Sraj 985204431Sraj/**********************************************************************/ 986204431Sraj/* Sequential write functions */ 987204431Sraj/**********************************************************************/ 988204431Sraj 989204431Srajint fdt_create(void *buf, int bufsize); 990204431Srajint fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size); 991204431Srajint fdt_finish_reservemap(void *fdt); 992204431Srajint fdt_begin_node(void *fdt, const char *name); 993204431Srajint fdt_property(void *fdt, const char *name, const void *val, int len); 994238742Simpstatic inline int fdt_property_u32(void *fdt, const char *name, uint32_t val) 995204431Sraj{ 996204431Sraj val = cpu_to_fdt32(val); 997204431Sraj return fdt_property(fdt, name, &val, sizeof(val)); 998204431Sraj} 999238742Simpstatic inline int fdt_property_u64(void *fdt, const char *name, uint64_t val) 1000238742Simp{ 1001238742Simp val = cpu_to_fdt64(val); 1002238742Simp return fdt_property(fdt, name, &val, sizeof(val)); 1003238742Simp} 1004238742Simpstatic inline int fdt_property_cell(void *fdt, const char *name, uint32_t val) 1005238742Simp{ 1006238742Simp return fdt_property_u32(fdt, name, val); 1007238742Simp} 1008204431Sraj#define fdt_property_string(fdt, name, str) \ 1009204431Sraj fdt_property(fdt, name, str, strlen(str)+1) 1010204431Srajint fdt_end_node(void *fdt); 1011204431Srajint fdt_finish(void *fdt); 1012204431Sraj 1013204431Sraj/**********************************************************************/ 1014204431Sraj/* Read-write functions */ 1015204431Sraj/**********************************************************************/ 1016204431Sraj 1017238742Simpint fdt_create_empty_tree(void *buf, int bufsize); 1018204431Srajint fdt_open_into(const void *fdt, void *buf, int bufsize); 1019204431Srajint fdt_pack(void *fdt); 1020204431Sraj 1021204431Sraj/** 1022204431Sraj * fdt_add_mem_rsv - add one memory reserve map entry 1023204431Sraj * @fdt: pointer to the device tree blob 1024204431Sraj * @address, @size: 64-bit values (native endian) 1025204431Sraj * 1026204431Sraj * Adds a reserve map entry to the given blob reserving a region at 1027204431Sraj * address address of length size. 1028204431Sraj * 1029204431Sraj * This function will insert data into the reserve map and will 1030204431Sraj * therefore change the indexes of some entries in the table. 1031204431Sraj * 1032204431Sraj * returns: 1033204431Sraj * 0, on success 1034204431Sraj * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to 1035204431Sraj * contain the new reservation entry 1036204431Sraj * -FDT_ERR_BADMAGIC, 1037204431Sraj * -FDT_ERR_BADVERSION, 1038204431Sraj * -FDT_ERR_BADSTATE, 1039204431Sraj * -FDT_ERR_BADSTRUCTURE, 1040204431Sraj * -FDT_ERR_BADLAYOUT, 1041204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 1042204431Sraj */ 1043204431Srajint fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size); 1044204431Sraj 1045204431Sraj/** 1046204431Sraj * fdt_del_mem_rsv - remove a memory reserve map entry 1047204431Sraj * @fdt: pointer to the device tree blob 1048204431Sraj * @n: entry to remove 1049204431Sraj * 1050204431Sraj * fdt_del_mem_rsv() removes the n-th memory reserve map entry from 1051204431Sraj * the blob. 1052204431Sraj * 1053204431Sraj * This function will delete data from the reservation table and will 1054204431Sraj * therefore change the indexes of some entries in the table. 1055204431Sraj * 1056204431Sraj * returns: 1057204431Sraj * 0, on success 1058204431Sraj * -FDT_ERR_NOTFOUND, there is no entry of the given index (i.e. there 1059204431Sraj * are less than n+1 reserve map entries) 1060204431Sraj * -FDT_ERR_BADMAGIC, 1061204431Sraj * -FDT_ERR_BADVERSION, 1062204431Sraj * -FDT_ERR_BADSTATE, 1063204431Sraj * -FDT_ERR_BADSTRUCTURE, 1064204431Sraj * -FDT_ERR_BADLAYOUT, 1065204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 1066204431Sraj */ 1067204431Srajint fdt_del_mem_rsv(void *fdt, int n); 1068204431Sraj 1069204431Sraj/** 1070204431Sraj * fdt_set_name - change the name of a given node 1071204431Sraj * @fdt: pointer to the device tree blob 1072204431Sraj * @nodeoffset: structure block offset of a node 1073204431Sraj * @name: name to give the node 1074204431Sraj * 1075204431Sraj * fdt_set_name() replaces the name (including unit address, if any) 1076204431Sraj * of the given node with the given string. NOTE: this function can't 1077204431Sraj * efficiently check if the new name is unique amongst the given 1078204431Sraj * node's siblings; results are undefined if this function is invoked 1079204431Sraj * with a name equal to one of the given node's siblings. 1080204431Sraj * 1081204431Sraj * This function may insert or delete data from the blob, and will 1082204431Sraj * therefore change the offsets of some existing nodes. 1083204431Sraj * 1084204431Sraj * returns: 1085204431Sraj * 0, on success 1086204431Sraj * -FDT_ERR_NOSPACE, there is insufficient free space in the blob 1087204431Sraj * to contain the new name 1088204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 1089204431Sraj * -FDT_ERR_BADMAGIC, 1090204431Sraj * -FDT_ERR_BADVERSION, 1091204431Sraj * -FDT_ERR_BADSTATE, standard meanings 1092204431Sraj */ 1093204431Srajint fdt_set_name(void *fdt, int nodeoffset, const char *name); 1094204431Sraj 1095204431Sraj/** 1096204431Sraj * fdt_setprop - create or change a property 1097204431Sraj * @fdt: pointer to the device tree blob 1098204431Sraj * @nodeoffset: offset of the node whose property to change 1099204431Sraj * @name: name of the property to change 1100204431Sraj * @val: pointer to data to set the property value to 1101204431Sraj * @len: length of the property value 1102204431Sraj * 1103204431Sraj * fdt_setprop() sets the value of the named property in the given 1104204431Sraj * node to the given value and length, creating the property if it 1105204431Sraj * does not already exist. 1106204431Sraj * 1107204431Sraj * This function may insert or delete data from the blob, and will 1108204431Sraj * therefore change the offsets of some existing nodes. 1109204431Sraj * 1110204431Sraj * returns: 1111204431Sraj * 0, on success 1112204431Sraj * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to 1113204431Sraj * contain the new property value 1114204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 1115204431Sraj * -FDT_ERR_BADLAYOUT, 1116204431Sraj * -FDT_ERR_BADMAGIC, 1117204431Sraj * -FDT_ERR_BADVERSION, 1118204431Sraj * -FDT_ERR_BADSTATE, 1119204431Sraj * -FDT_ERR_BADSTRUCTURE, 1120204431Sraj * -FDT_ERR_BADLAYOUT, 1121204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 1122204431Sraj */ 1123204431Srajint fdt_setprop(void *fdt, int nodeoffset, const char *name, 1124204431Sraj const void *val, int len); 1125204431Sraj 1126204431Sraj/** 1127238742Simp * fdt_setprop_u32 - set a property to a 32-bit integer 1128204431Sraj * @fdt: pointer to the device tree blob 1129204431Sraj * @nodeoffset: offset of the node whose property to change 1130204431Sraj * @name: name of the property to change 1131204431Sraj * @val: 32-bit integer value for the property (native endian) 1132204431Sraj * 1133238742Simp * fdt_setprop_u32() sets the value of the named property in the given 1134238742Simp * node to the given 32-bit integer value (converting to big-endian if 1135204431Sraj * necessary), or creates a new property with that value if it does 1136204431Sraj * not already exist. 1137204431Sraj * 1138204431Sraj * This function may insert or delete data from the blob, and will 1139204431Sraj * therefore change the offsets of some existing nodes. 1140204431Sraj * 1141204431Sraj * returns: 1142204431Sraj * 0, on success 1143204431Sraj * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to 1144204431Sraj * contain the new property value 1145204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 1146204431Sraj * -FDT_ERR_BADLAYOUT, 1147204431Sraj * -FDT_ERR_BADMAGIC, 1148204431Sraj * -FDT_ERR_BADVERSION, 1149204431Sraj * -FDT_ERR_BADSTATE, 1150204431Sraj * -FDT_ERR_BADSTRUCTURE, 1151204431Sraj * -FDT_ERR_BADLAYOUT, 1152204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 1153204431Sraj */ 1154238742Simpstatic inline int fdt_setprop_u32(void *fdt, int nodeoffset, const char *name, 1155238742Simp uint32_t val) 1156204431Sraj{ 1157204431Sraj val = cpu_to_fdt32(val); 1158204431Sraj return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val)); 1159204431Sraj} 1160204431Sraj 1161204431Sraj/** 1162238742Simp * fdt_setprop_u64 - set a property to a 64-bit integer 1163238742Simp * @fdt: pointer to the device tree blob 1164238742Simp * @nodeoffset: offset of the node whose property to change 1165238742Simp * @name: name of the property to change 1166238742Simp * @val: 64-bit integer value for the property (native endian) 1167238742Simp * 1168238742Simp * fdt_setprop_u64() sets the value of the named property in the given 1169238742Simp * node to the given 64-bit integer value (converting to big-endian if 1170238742Simp * necessary), or creates a new property with that value if it does 1171238742Simp * not already exist. 1172238742Simp * 1173238742Simp * This function may insert or delete data from the blob, and will 1174238742Simp * therefore change the offsets of some existing nodes. 1175238742Simp * 1176238742Simp * returns: 1177238742Simp * 0, on success 1178238742Simp * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to 1179238742Simp * contain the new property value 1180238742Simp * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 1181238742Simp * -FDT_ERR_BADLAYOUT, 1182238742Simp * -FDT_ERR_BADMAGIC, 1183238742Simp * -FDT_ERR_BADVERSION, 1184238742Simp * -FDT_ERR_BADSTATE, 1185238742Simp * -FDT_ERR_BADSTRUCTURE, 1186238742Simp * -FDT_ERR_BADLAYOUT, 1187238742Simp * -FDT_ERR_TRUNCATED, standard meanings 1188238742Simp */ 1189238742Simpstatic inline int fdt_setprop_u64(void *fdt, int nodeoffset, const char *name, 1190238742Simp uint64_t val) 1191238742Simp{ 1192238742Simp val = cpu_to_fdt64(val); 1193238742Simp return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val)); 1194238742Simp} 1195238742Simp 1196238742Simp/** 1197238742Simp * fdt_setprop_cell - set a property to a single cell value 1198238742Simp * 1199238742Simp * This is an alternative name for fdt_setprop_u32() 1200238742Simp */ 1201238742Simpstatic inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name, 1202238742Simp uint32_t val) 1203238742Simp{ 1204238742Simp return fdt_setprop_u32(fdt, nodeoffset, name, val); 1205238742Simp} 1206238742Simp 1207238742Simp/** 1208204431Sraj * fdt_setprop_string - set a property to a string value 1209204431Sraj * @fdt: pointer to the device tree blob 1210204431Sraj * @nodeoffset: offset of the node whose property to change 1211204431Sraj * @name: name of the property to change 1212204431Sraj * @str: string value for the property 1213204431Sraj * 1214204431Sraj * fdt_setprop_string() sets the value of the named property in the 1215204431Sraj * given node to the given string value (using the length of the 1216204431Sraj * string to determine the new length of the property), or creates a 1217204431Sraj * new property with that value if it does not already exist. 1218204431Sraj * 1219204431Sraj * This function may insert or delete data from the blob, and will 1220204431Sraj * therefore change the offsets of some existing nodes. 1221204431Sraj * 1222204431Sraj * returns: 1223204431Sraj * 0, on success 1224204431Sraj * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to 1225204431Sraj * contain the new property value 1226204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 1227204431Sraj * -FDT_ERR_BADLAYOUT, 1228204431Sraj * -FDT_ERR_BADMAGIC, 1229204431Sraj * -FDT_ERR_BADVERSION, 1230204431Sraj * -FDT_ERR_BADSTATE, 1231204431Sraj * -FDT_ERR_BADSTRUCTURE, 1232204431Sraj * -FDT_ERR_BADLAYOUT, 1233204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 1234204431Sraj */ 1235204431Sraj#define fdt_setprop_string(fdt, nodeoffset, name, str) \ 1236204431Sraj fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1) 1237204431Sraj 1238204431Sraj/** 1239238742Simp * fdt_appendprop - append to or create a property 1240238742Simp * @fdt: pointer to the device tree blob 1241238742Simp * @nodeoffset: offset of the node whose property to change 1242238742Simp * @name: name of the property to append to 1243238742Simp * @val: pointer to data to append to the property value 1244238742Simp * @len: length of the data to append to the property value 1245238742Simp * 1246238742Simp * fdt_appendprop() appends the value to the named property in the 1247238742Simp * given node, creating the property if it does not already exist. 1248238742Simp * 1249238742Simp * This function may insert data into the blob, and will therefore 1250238742Simp * change the offsets of some existing nodes. 1251238742Simp * 1252238742Simp * returns: 1253238742Simp * 0, on success 1254238742Simp * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to 1255238742Simp * contain the new property value 1256238742Simp * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 1257238742Simp * -FDT_ERR_BADLAYOUT, 1258238742Simp * -FDT_ERR_BADMAGIC, 1259238742Simp * -FDT_ERR_BADVERSION, 1260238742Simp * -FDT_ERR_BADSTATE, 1261238742Simp * -FDT_ERR_BADSTRUCTURE, 1262238742Simp * -FDT_ERR_BADLAYOUT, 1263238742Simp * -FDT_ERR_TRUNCATED, standard meanings 1264238742Simp */ 1265238742Simpint fdt_appendprop(void *fdt, int nodeoffset, const char *name, 1266238742Simp const void *val, int len); 1267238742Simp 1268238742Simp/** 1269238742Simp * fdt_appendprop_u32 - append a 32-bit integer value to a property 1270238742Simp * @fdt: pointer to the device tree blob 1271238742Simp * @nodeoffset: offset of the node whose property to change 1272238742Simp * @name: name of the property to change 1273238742Simp * @val: 32-bit integer value to append to the property (native endian) 1274238742Simp * 1275238742Simp * fdt_appendprop_u32() appends the given 32-bit integer value 1276238742Simp * (converting to big-endian if necessary) to the value of the named 1277238742Simp * property in the given node, or creates a new property with that 1278238742Simp * value if it does not already exist. 1279238742Simp * 1280238742Simp * This function may insert data into the blob, and will therefore 1281238742Simp * change the offsets of some existing nodes. 1282238742Simp * 1283238742Simp * returns: 1284238742Simp * 0, on success 1285238742Simp * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to 1286238742Simp * contain the new property value 1287238742Simp * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 1288238742Simp * -FDT_ERR_BADLAYOUT, 1289238742Simp * -FDT_ERR_BADMAGIC, 1290238742Simp * -FDT_ERR_BADVERSION, 1291238742Simp * -FDT_ERR_BADSTATE, 1292238742Simp * -FDT_ERR_BADSTRUCTURE, 1293238742Simp * -FDT_ERR_BADLAYOUT, 1294238742Simp * -FDT_ERR_TRUNCATED, standard meanings 1295238742Simp */ 1296238742Simpstatic inline int fdt_appendprop_u32(void *fdt, int nodeoffset, 1297238742Simp const char *name, uint32_t val) 1298238742Simp{ 1299238742Simp val = cpu_to_fdt32(val); 1300238742Simp return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val)); 1301238742Simp} 1302238742Simp 1303238742Simp/** 1304238742Simp * fdt_appendprop_u64 - append a 64-bit integer value to a property 1305238742Simp * @fdt: pointer to the device tree blob 1306238742Simp * @nodeoffset: offset of the node whose property to change 1307238742Simp * @name: name of the property to change 1308238742Simp * @val: 64-bit integer value to append to the property (native endian) 1309238742Simp * 1310238742Simp * fdt_appendprop_u64() appends the given 64-bit integer value 1311238742Simp * (converting to big-endian if necessary) to the value of the named 1312238742Simp * property in the given node, or creates a new property with that 1313238742Simp * value if it does not already exist. 1314238742Simp * 1315238742Simp * This function may insert data into the blob, and will therefore 1316238742Simp * change the offsets of some existing nodes. 1317238742Simp * 1318238742Simp * returns: 1319238742Simp * 0, on success 1320238742Simp * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to 1321238742Simp * contain the new property value 1322238742Simp * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 1323238742Simp * -FDT_ERR_BADLAYOUT, 1324238742Simp * -FDT_ERR_BADMAGIC, 1325238742Simp * -FDT_ERR_BADVERSION, 1326238742Simp * -FDT_ERR_BADSTATE, 1327238742Simp * -FDT_ERR_BADSTRUCTURE, 1328238742Simp * -FDT_ERR_BADLAYOUT, 1329238742Simp * -FDT_ERR_TRUNCATED, standard meanings 1330238742Simp */ 1331238742Simpstatic inline int fdt_appendprop_u64(void *fdt, int nodeoffset, 1332238742Simp const char *name, uint64_t val) 1333238742Simp{ 1334238742Simp val = cpu_to_fdt64(val); 1335238742Simp return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val)); 1336238742Simp} 1337238742Simp 1338238742Simp/** 1339238742Simp * fdt_appendprop_cell - append a single cell value to a property 1340238742Simp * 1341238742Simp * This is an alternative name for fdt_appendprop_u32() 1342238742Simp */ 1343238742Simpstatic inline int fdt_appendprop_cell(void *fdt, int nodeoffset, 1344238742Simp const char *name, uint32_t val) 1345238742Simp{ 1346238742Simp return fdt_appendprop_u32(fdt, nodeoffset, name, val); 1347238742Simp} 1348238742Simp 1349238742Simp/** 1350238742Simp * fdt_appendprop_string - append a string to a property 1351238742Simp * @fdt: pointer to the device tree blob 1352238742Simp * @nodeoffset: offset of the node whose property to change 1353238742Simp * @name: name of the property to change 1354238742Simp * @str: string value to append to the property 1355238742Simp * 1356238742Simp * fdt_appendprop_string() appends the given string to the value of 1357238742Simp * the named property in the given node, or creates a new property 1358238742Simp * with that value if it does not already exist. 1359238742Simp * 1360238742Simp * This function may insert data into the blob, and will therefore 1361238742Simp * change the offsets of some existing nodes. 1362238742Simp * 1363238742Simp * returns: 1364238742Simp * 0, on success 1365238742Simp * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to 1366238742Simp * contain the new property value 1367238742Simp * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 1368238742Simp * -FDT_ERR_BADLAYOUT, 1369238742Simp * -FDT_ERR_BADMAGIC, 1370238742Simp * -FDT_ERR_BADVERSION, 1371238742Simp * -FDT_ERR_BADSTATE, 1372238742Simp * -FDT_ERR_BADSTRUCTURE, 1373238742Simp * -FDT_ERR_BADLAYOUT, 1374238742Simp * -FDT_ERR_TRUNCATED, standard meanings 1375238742Simp */ 1376238742Simp#define fdt_appendprop_string(fdt, nodeoffset, name, str) \ 1377238742Simp fdt_appendprop((fdt), (nodeoffset), (name), (str), strlen(str)+1) 1378238742Simp 1379238742Simp/** 1380204431Sraj * fdt_delprop - delete a property 1381204431Sraj * @fdt: pointer to the device tree blob 1382204431Sraj * @nodeoffset: offset of the node whose property to nop 1383204431Sraj * @name: name of the property to nop 1384204431Sraj * 1385204431Sraj * fdt_del_property() will delete the given property. 1386204431Sraj * 1387204431Sraj * This function will delete data from the blob, and will therefore 1388204431Sraj * change the offsets of some existing nodes. 1389204431Sraj * 1390204431Sraj * returns: 1391204431Sraj * 0, on success 1392204431Sraj * -FDT_ERR_NOTFOUND, node does not have the named property 1393204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 1394204431Sraj * -FDT_ERR_BADLAYOUT, 1395204431Sraj * -FDT_ERR_BADMAGIC, 1396204431Sraj * -FDT_ERR_BADVERSION, 1397204431Sraj * -FDT_ERR_BADSTATE, 1398204431Sraj * -FDT_ERR_BADSTRUCTURE, 1399204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 1400204431Sraj */ 1401204431Srajint fdt_delprop(void *fdt, int nodeoffset, const char *name); 1402204431Sraj 1403204431Sraj/** 1404204431Sraj * fdt_add_subnode_namelen - creates a new node based on substring 1405204431Sraj * @fdt: pointer to the device tree blob 1406204431Sraj * @parentoffset: structure block offset of a node 1407204431Sraj * @name: name of the subnode to locate 1408204431Sraj * @namelen: number of characters of name to consider 1409204431Sraj * 1410204431Sraj * Identical to fdt_add_subnode(), but use only the first namelen 1411204431Sraj * characters of name as the name of the new node. This is useful for 1412204431Sraj * creating subnodes based on a portion of a larger string, such as a 1413204431Sraj * full path. 1414204431Sraj */ 1415204431Srajint fdt_add_subnode_namelen(void *fdt, int parentoffset, 1416204431Sraj const char *name, int namelen); 1417204431Sraj 1418204431Sraj/** 1419204431Sraj * fdt_add_subnode - creates a new node 1420204431Sraj * @fdt: pointer to the device tree blob 1421204431Sraj * @parentoffset: structure block offset of a node 1422204431Sraj * @name: name of the subnode to locate 1423204431Sraj * 1424204431Sraj * fdt_add_subnode() creates a new node as a subnode of the node at 1425204431Sraj * structure block offset parentoffset, with the given name (which 1426204431Sraj * should include the unit address, if any). 1427204431Sraj * 1428204431Sraj * This function will insert data into the blob, and will therefore 1429204431Sraj * change the offsets of some existing nodes. 1430204431Sraj 1431204431Sraj * returns: 1432204431Sraj * structure block offset of the created nodeequested subnode (>=0), on success 1433204431Sraj * -FDT_ERR_NOTFOUND, if the requested subnode does not exist 1434204431Sraj * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag 1435204431Sraj * -FDT_ERR_EXISTS, if the node at parentoffset already has a subnode of 1436204431Sraj * the given name 1437204431Sraj * -FDT_ERR_NOSPACE, if there is insufficient free space in the 1438204431Sraj * blob to contain the new node 1439204431Sraj * -FDT_ERR_NOSPACE 1440204431Sraj * -FDT_ERR_BADLAYOUT 1441204431Sraj * -FDT_ERR_BADMAGIC, 1442204431Sraj * -FDT_ERR_BADVERSION, 1443204431Sraj * -FDT_ERR_BADSTATE, 1444204431Sraj * -FDT_ERR_BADSTRUCTURE, 1445204431Sraj * -FDT_ERR_TRUNCATED, standard meanings. 1446204431Sraj */ 1447204431Srajint fdt_add_subnode(void *fdt, int parentoffset, const char *name); 1448204431Sraj 1449204431Sraj/** 1450204431Sraj * fdt_del_node - delete a node (subtree) 1451204431Sraj * @fdt: pointer to the device tree blob 1452204431Sraj * @nodeoffset: offset of the node to nop 1453204431Sraj * 1454204431Sraj * fdt_del_node() will remove the given node, including all its 1455204431Sraj * subnodes if any, from the blob. 1456204431Sraj * 1457204431Sraj * This function will delete data from the blob, and will therefore 1458204431Sraj * change the offsets of some existing nodes. 1459204431Sraj * 1460204431Sraj * returns: 1461204431Sraj * 0, on success 1462204431Sraj * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag 1463204431Sraj * -FDT_ERR_BADLAYOUT, 1464204431Sraj * -FDT_ERR_BADMAGIC, 1465204431Sraj * -FDT_ERR_BADVERSION, 1466204431Sraj * -FDT_ERR_BADSTATE, 1467204431Sraj * -FDT_ERR_BADSTRUCTURE, 1468204431Sraj * -FDT_ERR_TRUNCATED, standard meanings 1469204431Sraj */ 1470204431Srajint fdt_del_node(void *fdt, int nodeoffset); 1471204431Sraj 1472204431Sraj/**********************************************************************/ 1473204431Sraj/* Debugging / informational functions */ 1474204431Sraj/**********************************************************************/ 1475204431Sraj 1476204431Srajconst char *fdt_strerror(int errval); 1477204431Sraj 1478204431Sraj#endif /* _LIBFDT_H */ 1479