-#ifndef _LIBFDT_H
-#define _LIBFDT_H
-/*
- * libfdt - Flat Device Tree manipulation
- * Copyright (C) 2006 David Gibson, IBM Corporation.
- *
- * libfdt is dual licensed: you can use it either under the terms of
- * the GPL, or the BSD license, at your option.
- *
- * a) This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- * MA 02110-1301 USA
- *
- * Alternatively,
- *
- * b) Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * 1. Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the following
- * disclaimer.
- * 2. Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials
- * provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
- * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <libfdt_env.h>
-#include <fdt.h>
-
-#define FDT_FIRST_SUPPORTED_VERSION 0x10
-#define FDT_LAST_SUPPORTED_VERSION 0x11
-
-/* Error codes: informative error codes */
-#define FDT_ERR_NOTFOUND 1
- /* FDT_ERR_NOTFOUND: The requested node or property does not exist */
-#define FDT_ERR_EXISTS 2
- /* FDT_ERR_EXISTS: Attemped to create a node or property which
- * already exists */
-#define FDT_ERR_NOSPACE 3
- /* FDT_ERR_NOSPACE: Operation needed to expand the device
- * tree, but its buffer did not have sufficient space to
- * contain the expanded tree. Use fdt_open_into() to move the
- * device tree to a buffer with more space. */
-
-/* Error codes: codes for bad parameters */
-#define FDT_ERR_BADOFFSET 4
- /* FDT_ERR_BADOFFSET: Function was passed a structure block
- * offset which is out-of-bounds, or which points to an
- * unsuitable part of the structure for the operation. */
-#define FDT_ERR_BADPATH 5
- /* FDT_ERR_BADPATH: Function was passed a badly formatted path
- * (e.g. missing a leading / for a function which requires an
- * absolute path) */
-#define FDT_ERR_BADPHANDLE 6
- /* FDT_ERR_BADPHANDLE: Function was passed an invalid phandle
- * value. phandle values of 0 and -1 are not permitted. */
-#define FDT_ERR_BADSTATE 7
- /* FDT_ERR_BADSTATE: Function was passed an incomplete device
- * tree created by the sequential-write functions, which is
- * not sufficiently complete for the requested operation. */
-
-/* Error codes: codes for bad device tree blobs */
-#define FDT_ERR_TRUNCATED 8
- /* FDT_ERR_TRUNCATED: Structure block of the given device tree
- * ends without an FDT_END tag. */
-#define FDT_ERR_BADMAGIC 9
- /* FDT_ERR_BADMAGIC: Given "device tree" appears not to be a
- * device tree at all - it is missing the flattened device
- * tree magic number. */
-#define FDT_ERR_BADVERSION 10
- /* FDT_ERR_BADVERSION: Given device tree has a version which
- * can't be handled by the requested operation. For
- * read-write functions, this may mean that fdt_open_into() is
- * required to convert the tree to the expected version. */
-#define FDT_ERR_BADSTRUCTURE 11
- /* FDT_ERR_BADSTRUCTURE: Given device tree has a corrupt
- * structure block or other serious error (e.g. misnested
- * nodes, or subnodes preceding properties). */
-#define FDT_ERR_BADLAYOUT 12
- /* FDT_ERR_BADLAYOUT: For read-write functions, the given
- * device tree has it's sub-blocks in an order that the
- * function can't handle (memory reserve map, then structure,
- * then strings). Use fdt_open_into() to reorganize the tree
- * into a form suitable for the read-write operations. */
-
-/* "Can't happen" error indicating a bug in libfdt */
-#define FDT_ERR_INTERNAL 13
- /* FDT_ERR_INTERNAL: libfdt has failed an internal assertion.
- * Should never be returned, if it is, it indicates a bug in
- * libfdt itself. */
-
-#define FDT_ERR_MAX 13
-
-/**********************************************************************/
-/* Low-level functions (you probably don't need these) */
-/**********************************************************************/
-
-const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen);
-static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen)
-{
- return (void *)(uintptr_t)fdt_offset_ptr(fdt, offset, checklen);
-}
-
-uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset);
-
-/**********************************************************************/
-/* Traversal functions */
-/**********************************************************************/
-
-int fdt_next_node(const void *fdt, int offset, int *depth);
-
-/**********************************************************************/
-/* General functions */
-/**********************************************************************/
-
-#define fdt_get_header(fdt, field) \
- (fdt32_to_cpu(((const struct fdt_header *)(fdt))->field))
-#define fdt_magic(fdt) (fdt_get_header(fdt, magic))
-#define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize))
-#define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct))
-#define fdt_off_dt_strings(fdt) (fdt_get_header(fdt, off_dt_strings))
-#define fdt_off_mem_rsvmap(fdt) (fdt_get_header(fdt, off_mem_rsvmap))
-#define fdt_version(fdt) (fdt_get_header(fdt, version))
-#define fdt_last_comp_version(fdt) (fdt_get_header(fdt, last_comp_version))
-#define fdt_boot_cpuid_phys(fdt) (fdt_get_header(fdt, boot_cpuid_phys))
-#define fdt_size_dt_strings(fdt) (fdt_get_header(fdt, size_dt_strings))
-#define fdt_size_dt_struct(fdt) (fdt_get_header(fdt, size_dt_struct))
-
-#define __fdt_set_hdr(name) \
- static inline void fdt_set_##name(void *fdt, uint32_t val) \
- { \
- struct fdt_header *fdth = (struct fdt_header*)fdt; \
- fdth->name = cpu_to_fdt32(val); \
- }
-__fdt_set_hdr(magic);
-__fdt_set_hdr(totalsize);
-__fdt_set_hdr(off_dt_struct);
-__fdt_set_hdr(off_dt_strings);
-__fdt_set_hdr(off_mem_rsvmap);
-__fdt_set_hdr(version);
-__fdt_set_hdr(last_comp_version);
-__fdt_set_hdr(boot_cpuid_phys);
-__fdt_set_hdr(size_dt_strings);
-__fdt_set_hdr(size_dt_struct);
-#undef __fdt_set_hdr
-
-/**
- * fdt_check_header - sanity check a device tree or possible device tree
- * @fdt: pointer to data which might be a flattened device tree
- *
- * fdt_check_header() checks that the given buffer contains what
- * appears to be a flattened device tree with sane information in its
- * header.
- *
- * returns:
- * 0, if the buffer appears to contain a valid device tree
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE, standard meanings, as above
- */
-int fdt_check_header(const void *fdt);
-
-/**
- * fdt_move - move a device tree around in memory
- * @fdt: pointer to the device tree to move
- * @buf: pointer to memory where the device is to be moved
- * @bufsize: size of the memory space at buf
- *
- * fdt_move() relocates, if possible, the device tree blob located at
- * fdt to the buffer at buf of size bufsize. The buffer may overlap
- * with the existing device tree blob at fdt. Therefore,
- * fdt_move(fdt, fdt, fdt_totalsize(fdt))
- * should always succeed.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, bufsize is insufficient to contain the device tree
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE, standard meanings
- */
-int fdt_move(const void *fdt, void *buf, int bufsize);
-
-/**********************************************************************/
-/* Read-only functions */
-/**********************************************************************/
-
-/**
- * fdt_string - retrieve a string from the strings block of a device tree
- * @fdt: pointer to the device tree blob
- * @stroffset: offset of the string within the strings block (native endian)
- *
- * fdt_string() retrieves a pointer to a single string from the
- * strings block of the device tree blob at fdt.
- *
- * returns:
- * a pointer to the string, on success
- * NULL, if stroffset is out of bounds
- */
-const char *fdt_string(const void *fdt, int stroffset);
-
-/**
- * fdt_num_mem_rsv - retrieve the number of memory reserve map entries
- * @fdt: pointer to the device tree blob
- *
- * Returns the number of entries in the device tree blob's memory
- * reservation map. This does not include the terminating 0,0 entry
- * or any other (0,0) entries reserved for expansion.
- *
- * returns:
- * the number of entries
- */
-int fdt_num_mem_rsv(const void *fdt);
-
-/**
- * fdt_get_mem_rsv - retrieve one memory reserve map entry
- * @fdt: pointer to the device tree blob
- * @address, @size: pointers to 64-bit variables
- *
- * On success, *address and *size will contain the address and size of
- * the n-th reserve map entry from the device tree blob, in
- * native-endian format.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE, standard meanings
- */
-int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size);
-
-/**
- * fdt_subnode_offset_namelen - find a subnode based on substring
- * @fdt: pointer to the device tree blob
- * @parentoffset: structure block offset of a node
- * @name: name of the subnode to locate
- * @namelen: number of characters of name to consider
- *
- * Identical to fdt_subnode_offset(), but only examine the first
- * namelen characters of name for matching the subnode name. This is
- * useful for finding subnodes based on a portion of a larger string,
- * such as a full path.
- */
-int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,
- const char *name, int namelen);
-/**
- * fdt_subnode_offset - find a subnode of a given node
- * @fdt: pointer to the device tree blob
- * @parentoffset: structure block offset of a node
- * @name: name of the subnode to locate
- *
- * fdt_subnode_offset() finds a subnode of the node at structure block
- * offset parentoffset with the given name. name may include a unit
- * address, in which case fdt_subnode_offset() will find the subnode
- * with that unit address, or the unit address may be omitted, in
- * which case fdt_subnode_offset() will find an arbitrary subnode
- * whose name excluding unit address matches the given name.
- *
- * returns:
- * structure block offset of the requested subnode (>=0), on success
- * -FDT_ERR_NOTFOUND, if the requested subnode does not exist
- * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings.
- */
-int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name);
-
-/**
- * fdt_path_offset - find a tree node by its full path
- * @fdt: pointer to the device tree blob
- * @path: full path of the node to locate
- *
- * fdt_path_offset() finds a node of a given path in the device tree.
- * Each path component may omit the unit address portion, but the
- * results of this are undefined if any such path component is
- * ambiguous (that is if there are multiple nodes at the relevant
- * level matching the given component, differentiated only by unit
- * address).
- *
- * returns:
- * structure block offset of the node with the requested path (>=0), on success
- * -FDT_ERR_BADPATH, given path does not begin with '/' or is invalid
- * -FDT_ERR_NOTFOUND, if the requested node does not exist
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings.
- */
-int fdt_path_offset(const void *fdt, const char *path);
-
-/**
- * fdt_get_name - retrieve the name of a given node
- * @fdt: pointer to the device tree blob
- * @nodeoffset: structure block offset of the starting node
- * @lenp: pointer to an integer variable (will be overwritten) or NULL
- *
- * fdt_get_name() retrieves the name (including unit address) of the
- * device tree node at structure block offset nodeoffset. If lenp is
- * non-NULL, the length of this name is also returned, in the integer
- * pointed to by lenp.
- *
- * returns:
- * pointer to the node's name, on success
- * If lenp is non-NULL, *lenp contains the length of that name (>=0)
- * NULL, on error
- * if lenp is non-NULL *lenp contains an error code (<0):
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE, standard meanings
- */
-const char *fdt_get_name(const void *fdt, int nodeoffset, int *lenp);
-
-/**
- * fdt_first_property_offset - find the offset of a node's first property
- * @fdt: pointer to the device tree blob
- * @nodeoffset: structure block offset of a node
- *
- * fdt_first_property_offset() finds the first property of the node at
- * the given structure block offset.
- *
- * returns:
- * structure block offset of the property (>=0), on success
- * -FDT_ERR_NOTFOUND, if the requested node has no properties
- * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings.
- */
-int fdt_first_property_offset(const void *fdt, int nodeoffset);
-
-/**
- * fdt_next_property_offset - step through a node's properties
- * @fdt: pointer to the device tree blob
- * @offset: structure block offset of a property
- *
- * fdt_next_property_offset() finds the property immediately after the
- * one at the given structure block offset. This will be a property
- * of the same node as the given property.
- *
- * returns:
- * structure block offset of the next property (>=0), on success
- * -FDT_ERR_NOTFOUND, if the given property is the last in its node
- * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_PROP tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings.
- */
-int fdt_next_property_offset(const void *fdt, int offset);
-
-/**
- * fdt_get_property_by_offset - retrieve the property at a given offset
- * @fdt: pointer to the device tree blob
- * @offset: offset of the property to retrieve
- * @lenp: pointer to an integer variable (will be overwritten) or NULL
- *
- * fdt_get_property_by_offset() retrieves a pointer to the
- * fdt_property structure within the device tree blob at the given
- * offset. If lenp is non-NULL, the length of the property value is
- * also returned, in the integer pointed to by lenp.
- *
- * returns:
- * pointer to the structure representing the property
- * if lenp is non-NULL, *lenp contains the length of the property
- * value (>=0)
- * NULL, on error
- * if lenp is non-NULL, *lenp contains an error code (<0):
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-const struct fdt_property *fdt_get_property_by_offset(const void *fdt,
- int offset,
- int *lenp);
-
-/**
- * fdt_get_property_namelen - find a property based on substring
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to find
- * @name: name of the property to find
- * @namelen: number of characters of name to consider
- * @lenp: pointer to an integer variable (will be overwritten) or NULL
- *
- * Identical to fdt_get_property_namelen(), but only examine the first
- * namelen characters of name for matching the property name.
- */
-const struct fdt_property *fdt_get_property_namelen(const void *fdt,
- int nodeoffset,
- const char *name,
- int namelen, int *lenp);
-
-/**
- * fdt_get_property - find a given property in a given node
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to find
- * @name: name of the property to find
- * @lenp: pointer to an integer variable (will be overwritten) or NULL
- *
- * fdt_get_property() retrieves a pointer to the fdt_property
- * structure within the device tree blob corresponding to the property
- * named 'name' of the node at offset nodeoffset. If lenp is
- * non-NULL, the length of the property value is also returned, in the
- * integer pointed to by lenp.
- *
- * returns:
- * pointer to the structure representing the property
- * if lenp is non-NULL, *lenp contains the length of the property
- * value (>=0)
- * NULL, on error
- * if lenp is non-NULL, *lenp contains an error code (<0):
- * -FDT_ERR_NOTFOUND, node does not have named property
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-const struct fdt_property *fdt_get_property(const void *fdt, int nodeoffset,
- const char *name, int *lenp);
-static inline struct fdt_property *fdt_get_property_w(void *fdt, int nodeoffset,
- const char *name,
- int *lenp)
-{
- return (struct fdt_property *)(uintptr_t)
- fdt_get_property(fdt, nodeoffset, name, lenp);
-}
-
-/**
- * fdt_getprop_by_offset - retrieve the value of a property at a given offset
- * @fdt: pointer to the device tree blob
- * @ffset: offset of the property to read
- * @namep: pointer to a string variable (will be overwritten) or NULL
- * @lenp: pointer to an integer variable (will be overwritten) or NULL
- *
- * fdt_getprop_by_offset() retrieves a pointer to the value of the
- * property at structure block offset 'offset' (this will be a pointer
- * to within the device blob itself, not a copy of the value). If
- * lenp is non-NULL, the length of the property value is also
- * returned, in the integer pointed to by lenp. If namep is non-NULL,
- * the property's namne will also be returned in the char * pointed to
- * by namep (this will be a pointer to within the device tree's string
- * block, not a new copy of the name).
- *
- * returns:
- * pointer to the property's value
- * if lenp is non-NULL, *lenp contains the length of the property
- * value (>=0)
- * if namep is non-NULL *namep contiains a pointer to the property
- * name.
- * NULL, on error
- * if lenp is non-NULL, *lenp contains an error code (<0):
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-const void *fdt_getprop_by_offset(const void *fdt, int offset,
- const char **namep, int *lenp);
-
-/**
- * fdt_getprop_namelen - get property value based on substring
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to find
- * @name: name of the property to find
- * @namelen: number of characters of name to consider
- * @lenp: pointer to an integer variable (will be overwritten) or NULL
- *
- * Identical to fdt_getprop(), but only examine the first namelen
- * characters of name for matching the property name.
- */
-const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,
- const char *name, int namelen, int *lenp);
-
-/**
- * fdt_getprop - retrieve the value of a given property
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to find
- * @name: name of the property to find
- * @lenp: pointer to an integer variable (will be overwritten) or NULL
- *
- * fdt_getprop() retrieves a pointer to the value of the property
- * named 'name' of the node at offset nodeoffset (this will be a
- * pointer to within the device blob itself, not a copy of the value).
- * If lenp is non-NULL, the length of the property value is also
- * returned, in the integer pointed to by lenp.
- *
- * returns:
- * pointer to the property's value
- * if lenp is non-NULL, *lenp contains the length of the property
- * value (>=0)
- * NULL, on error
- * if lenp is non-NULL, *lenp contains an error code (<0):
- * -FDT_ERR_NOTFOUND, node does not have named property
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-const void *fdt_getprop(const void *fdt, int nodeoffset,
- const char *name, int *lenp);
-static inline void *fdt_getprop_w(void *fdt, int nodeoffset,
- const char *name, int *lenp)
-{
- return (void *)(uintptr_t)fdt_getprop(fdt, nodeoffset, name, lenp);
-}
-
-/**
- * fdt_get_phandle - retrieve the phandle of a given node
- * @fdt: pointer to the device tree blob
- * @nodeoffset: structure block offset of the node
- *
- * fdt_get_phandle() retrieves the phandle of the device tree node at
- * structure block offset nodeoffset.
- *
- * returns:
- * the phandle of the node at nodeoffset, on success (!= 0, != -1)
- * 0, if the node has no phandle, or another error occurs
- */
-uint32_t fdt_get_phandle(const void *fdt, int nodeoffset);
-
-/**
- * fdt_get_alias_namelen - get alias based on substring
- * @fdt: pointer to the device tree blob
- * @name: name of the alias th look up
- * @namelen: number of characters of name to consider
- *
- * Identical to fdt_get_alias(), but only examine the first namelen
- * characters of name for matching the alias name.
- */
-const char *fdt_get_alias_namelen(const void *fdt,
- const char *name, int namelen);
-
-/**
- * fdt_get_alias - retreive the path referenced by a given alias
- * @fdt: pointer to the device tree blob
- * @name: name of the alias th look up
- *
- * fdt_get_alias() retrieves the value of a given alias. That is, the
- * value of the property named 'name' in the node /aliases.
- *
- * returns:
- * a pointer to the expansion of the alias named 'name', of it exists
- * NULL, if the given alias or the /aliases node does not exist
- */
-const char *fdt_get_alias(const void *fdt, const char *name);
-
-/**
- * fdt_get_path - determine the full path of a node
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose path to find
- * @buf: character buffer to contain the returned path (will be overwritten)
- * @buflen: size of the character buffer at buf
- *
- * fdt_get_path() computes the full path of the node at offset
- * nodeoffset, and records that path in the buffer at buf.
- *
- * NOTE: This function is expensive, as it must scan the device tree
- * structure from the start to nodeoffset.
- *
- * returns:
- * 0, on success
- * buf contains the absolute path of the node at
- * nodeoffset, as a NUL-terminated string.
- * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
- * -FDT_ERR_NOSPACE, the path of the given node is longer than (bufsize-1)
- * characters and will not fit in the given buffer.
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE, standard meanings
- */
-int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen);
-
-/**
- * fdt_supernode_atdepth_offset - find a specific ancestor of a node
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose parent to find
- * @supernodedepth: depth of the ancestor to find
- * @nodedepth: pointer to an integer variable (will be overwritten) or NULL
- *
- * fdt_supernode_atdepth_offset() finds an ancestor of the given node
- * at a specific depth from the root (where the root itself has depth
- * 0, its immediate subnodes depth 1 and so forth). So
- * fdt_supernode_atdepth_offset(fdt, nodeoffset, 0, NULL);
- * will always return 0, the offset of the root node. If the node at
- * nodeoffset has depth D, then:
- * fdt_supernode_atdepth_offset(fdt, nodeoffset, D, NULL);
- * will return nodeoffset itself.
- *
- * NOTE: This function is expensive, as it must scan the device tree
- * structure from the start to nodeoffset.
- *
- * returns:
-
- * structure block offset of the node at node offset's ancestor
- * of depth supernodedepth (>=0), on success
- * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
-* -FDT_ERR_NOTFOUND, supernodedepth was greater than the depth of nodeoffset
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE, standard meanings
- */
-int fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset,
- int supernodedepth, int *nodedepth);
-
-/**
- * fdt_node_depth - find the depth of a given node
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose parent to find
- *
- * fdt_node_depth() finds the depth of a given node. The root node
- * has depth 0, its immediate subnodes depth 1 and so forth.
- *
- * NOTE: This function is expensive, as it must scan the device tree
- * structure from the start to nodeoffset.
- *
- * returns:
- * depth of the node at nodeoffset (>=0), on success
- * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE, standard meanings
- */
-int fdt_node_depth(const void *fdt, int nodeoffset);
-
-/**
- * fdt_parent_offset - find the parent of a given node
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose parent to find
- *
- * fdt_parent_offset() locates the parent node of a given node (that
- * is, it finds the offset of the node which contains the node at
- * nodeoffset as a subnode).
- *
- * NOTE: This function is expensive, as it must scan the device tree
- * structure from the start to nodeoffset, *twice*.
- *
- * returns:
- * structure block offset of the parent of the node at nodeoffset
- * (>=0), on success
- * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE, standard meanings
- */
-int fdt_parent_offset(const void *fdt, int nodeoffset);
-
-/**
- * fdt_node_offset_by_prop_value - find nodes with a given property value
- * @fdt: pointer to the device tree blob
- * @startoffset: only find nodes after this offset
- * @propname: property name to check
- * @propval: property value to search for
- * @proplen: length of the value in propval
- *
- * fdt_node_offset_by_prop_value() returns the offset of the first
- * node after startoffset, which has a property named propname whose
- * value is of length proplen and has value equal to propval; or if
- * startoffset is -1, the very first such node in the tree.
- *
- * To iterate through all nodes matching the criterion, the following
- * idiom can be used:
- * offset = fdt_node_offset_by_prop_value(fdt, -1, propname,
- * propval, proplen);
- * while (offset != -FDT_ERR_NOTFOUND) {
- * // other code here
- * offset = fdt_node_offset_by_prop_value(fdt, offset, propname,
- * propval, proplen);
- * }
- *
- * Note the -1 in the first call to the function, if 0 is used here
- * instead, the function will never locate the root node, even if it
- * matches the criterion.
- *
- * returns:
- * structure block offset of the located node (>= 0, >startoffset),
- * on success
- * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the
- * tree after startoffset
- * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE, standard meanings
- */
-int fdt_node_offset_by_prop_value(const void *fdt, int startoffset,
- const char *propname,
- const void *propval, int proplen);
-
-/**
- * fdt_node_offset_by_phandle - find the node with a given phandle
- * @fdt: pointer to the device tree blob
- * @phandle: phandle value
- *
- * fdt_node_offset_by_phandle() returns the offset of the node
- * which has the given phandle value. If there is more than one node
- * in the tree with the given phandle (an invalid tree), results are
- * undefined.
- *
- * returns:
- * structure block offset of the located node (>= 0), on success
- * -FDT_ERR_NOTFOUND, no node with that phandle exists
- * -FDT_ERR_BADPHANDLE, given phandle value was invalid (0 or -1)
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE, standard meanings
- */
-int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle);
-
-/**
- * fdt_node_check_compatible: check a node's compatible property
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of a tree node
- * @compatible: string to match against
- *
- *
- * fdt_node_check_compatible() returns 0 if the given node contains a
- * 'compatible' property with the given string as one of its elements,
- * it returns non-zero otherwise, or on error.
- *
- * returns:
- * 0, if the node has a 'compatible' property listing the given string
- * 1, if the node has a 'compatible' property, but it does not list
- * the given string
- * -FDT_ERR_NOTFOUND, if the given node has no 'compatible' property
- * -FDT_ERR_BADOFFSET, if nodeoffset does not refer to a BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE, standard meanings
- */
-int fdt_node_check_compatible(const void *fdt, int nodeoffset,
- const char *compatible);
-
-/**
- * fdt_node_offset_by_compatible - find nodes with a given 'compatible' value
- * @fdt: pointer to the device tree blob
- * @startoffset: only find nodes after this offset
- * @compatible: 'compatible' string to match against
- *
- * fdt_node_offset_by_compatible() returns the offset of the first
- * node after startoffset, which has a 'compatible' property which
- * lists the given compatible string; or if startoffset is -1, the
- * very first such node in the tree.
- *
- * To iterate through all nodes matching the criterion, the following
- * idiom can be used:
- * offset = fdt_node_offset_by_compatible(fdt, -1, compatible);
- * while (offset != -FDT_ERR_NOTFOUND) {
- * // other code here
- * offset = fdt_node_offset_by_compatible(fdt, offset, compatible);
- * }
- *
- * Note the -1 in the first call to the function, if 0 is used here
- * instead, the function will never locate the root node, even if it
- * matches the criterion.
- *
- * returns:
- * structure block offset of the located node (>= 0, >startoffset),
- * on success
- * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the
- * tree after startoffset
- * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE, standard meanings
- */
-int fdt_node_offset_by_compatible(const void *fdt, int startoffset,
- const char *compatible);
-
-/**********************************************************************/
-/* Write-in-place functions */
-/**********************************************************************/
-
-/**
- * fdt_setprop_inplace - change a property's value, but not its size
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to change
- * @name: name of the property to change
- * @val: pointer to data to replace the property value with
- * @len: length of the property value
- *
- * fdt_setprop_inplace() replaces the value of a given property with
- * the data in val, of length len. This function cannot change the
- * size of a property, and so will only work if len is equal to the
- * current length of the property.
- *
- * This function will alter only the bytes in the blob which contain
- * the given property value, and will not alter or move any other part
- * of the tree.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, if len is not equal to the property's current length
- * -FDT_ERR_NOTFOUND, node does not have the named property
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
- const void *val, int len);
-
-/**
- * fdt_setprop_inplace_u32 - change the value of a 32-bit integer property
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to change
- * @name: name of the property to change
- * @val: 32-bit integer value to replace the property with
- *
- * fdt_setprop_inplace_u32() replaces the value of a given property
- * with the 32-bit integer value in val, converting val to big-endian
- * if necessary. This function cannot change the size of a property,
- * and so will only work if the property already exists and has length
- * 4.
- *
- * This function will alter only the bytes in the blob which contain
- * the given property value, and will not alter or move any other part
- * of the tree.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, if the property's length is not equal to 4
- * -FDT_ERR_NOTFOUND, node does not have the named property
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-static inline int fdt_setprop_inplace_u32(void *fdt, int nodeoffset,
- const char *name, uint32_t val)
-{
- val = cpu_to_fdt32(val);
- return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val));
-}
-
-/**
- * fdt_setprop_inplace_u64 - change the value of a 64-bit integer property
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to change
- * @name: name of the property to change
- * @val: 64-bit integer value to replace the property with
- *
- * fdt_setprop_inplace_u64() replaces the value of a given property
- * with the 64-bit integer value in val, converting val to big-endian
- * if necessary. This function cannot change the size of a property,
- * and so will only work if the property already exists and has length
- * 8.
- *
- * This function will alter only the bytes in the blob which contain
- * the given property value, and will not alter or move any other part
- * of the tree.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, if the property's length is not equal to 8
- * -FDT_ERR_NOTFOUND, node does not have the named property
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-static inline int fdt_setprop_inplace_u64(void *fdt, int nodeoffset,
- const char *name, uint64_t val)
-{
- val = cpu_to_fdt64(val);
- return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val));
-}
-
-/**
- * fdt_setprop_inplace_cell - change the value of a single-cell property
- *
- * This is an alternative name for fdt_setprop_inplace_u32()
- */
-static inline int fdt_setprop_inplace_cell(void *fdt, int nodeoffset,
- const char *name, uint32_t val)
-{
- return fdt_setprop_inplace_u32(fdt, nodeoffset, name, val);
-}
-
-/**
- * fdt_nop_property - replace a property with nop tags
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to nop
- * @name: name of the property to nop
- *
- * fdt_nop_property() will replace a given property's representation
- * in the blob with FDT_NOP tags, effectively removing it from the
- * tree.
- *
- * This function will alter only the bytes in the blob which contain
- * the property, and will not alter or move any other part of the
- * tree.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOTFOUND, node does not have the named property
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-int fdt_nop_property(void *fdt, int nodeoffset, const char *name);
-
-/**
- * fdt_nop_node - replace a node (subtree) with nop tags
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node to nop
- *
- * fdt_nop_node() will replace a given node's representation in the
- * blob, including all its subnodes, if any, with FDT_NOP tags,
- * effectively removing it from the tree.
- *
- * This function will alter only the bytes in the blob which contain
- * the node and its properties and subnodes, and will not alter or
- * move any other part of the tree.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-int fdt_nop_node(void *fdt, int nodeoffset);
-
-/**********************************************************************/
-/* Sequential write functions */
-/**********************************************************************/
-
-int fdt_create(void *buf, int bufsize);
-int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size);
-int fdt_finish_reservemap(void *fdt);
-int fdt_begin_node(void *fdt, const char *name);
-int fdt_property(void *fdt, const char *name, const void *val, int len);
-static inline int fdt_property_u32(void *fdt, const char *name, uint32_t val)
-{
- val = cpu_to_fdt32(val);
- return fdt_property(fdt, name, &val, sizeof(val));
-}
-static inline int fdt_property_u64(void *fdt, const char *name, uint64_t val)
-{
- val = cpu_to_fdt64(val);
- return fdt_property(fdt, name, &val, sizeof(val));
-}
-static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val)
-{
- return fdt_property_u32(fdt, name, val);
-}
-#define fdt_property_string(fdt, name, str) \
- fdt_property(fdt, name, str, strlen(str)+1)
-int fdt_end_node(void *fdt);
-int fdt_finish(void *fdt);
-
-/**********************************************************************/
-/* Read-write functions */
-/**********************************************************************/
-
-int fdt_create_empty_tree(void *buf, int bufsize);
-int fdt_open_into(const void *fdt, void *buf, int bufsize);
-int fdt_pack(void *fdt);
-
-/**
- * fdt_add_mem_rsv - add one memory reserve map entry
- * @fdt: pointer to the device tree blob
- * @address, @size: 64-bit values (native endian)
- *
- * Adds a reserve map entry to the given blob reserving a region at
- * address address of length size.
- *
- * This function will insert data into the reserve map and will
- * therefore change the indexes of some entries in the table.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
- * contain the new reservation entry
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size);
-
-/**
- * fdt_del_mem_rsv - remove a memory reserve map entry
- * @fdt: pointer to the device tree blob
- * @n: entry to remove
- *
- * fdt_del_mem_rsv() removes the n-th memory reserve map entry from
- * the blob.
- *
- * This function will delete data from the reservation table and will
- * therefore change the indexes of some entries in the table.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOTFOUND, there is no entry of the given index (i.e. there
- * are less than n+1 reserve map entries)
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-int fdt_del_mem_rsv(void *fdt, int n);
-
-/**
- * fdt_set_name - change the name of a given node
- * @fdt: pointer to the device tree blob
- * @nodeoffset: structure block offset of a node
- * @name: name to give the node
- *
- * fdt_set_name() replaces the name (including unit address, if any)
- * of the given node with the given string. NOTE: this function can't
- * efficiently check if the new name is unique amongst the given
- * node's siblings; results are undefined if this function is invoked
- * with a name equal to one of the given node's siblings.
- *
- * This function may insert or delete data from the blob, and will
- * therefore change the offsets of some existing nodes.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, there is insufficient free space in the blob
- * to contain the new name
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE, standard meanings
- */
-int fdt_set_name(void *fdt, int nodeoffset, const char *name);
-
-/**
- * fdt_setprop - create or change a property
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to change
- * @name: name of the property to change
- * @val: pointer to data to set the property value to
- * @len: length of the property value
- *
- * fdt_setprop() sets the value of the named property in the given
- * node to the given value and length, creating the property if it
- * does not already exist.
- *
- * This function may insert or delete data from the blob, and will
- * therefore change the offsets of some existing nodes.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
- * contain the new property value
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-int fdt_setprop(void *fdt, int nodeoffset, const char *name,
- const void *val, int len);
-
-/**
- * fdt_setprop_u32 - set a property to a 32-bit integer
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to change
- * @name: name of the property to change
- * @val: 32-bit integer value for the property (native endian)
- *
- * fdt_setprop_u32() sets the value of the named property in the given
- * node to the given 32-bit integer value (converting to big-endian if
- * necessary), or creates a new property with that value if it does
- * not already exist.
- *
- * This function may insert or delete data from the blob, and will
- * therefore change the offsets of some existing nodes.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
- * contain the new property value
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-static inline int fdt_setprop_u32(void *fdt, int nodeoffset, const char *name,
- uint32_t val)
-{
- val = cpu_to_fdt32(val);
- return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val));
-}
-
-/**
- * fdt_setprop_u64 - set a property to a 64-bit integer
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to change
- * @name: name of the property to change
- * @val: 64-bit integer value for the property (native endian)
- *
- * fdt_setprop_u64() sets the value of the named property in the given
- * node to the given 64-bit integer value (converting to big-endian if
- * necessary), or creates a new property with that value if it does
- * not already exist.
- *
- * This function may insert or delete data from the blob, and will
- * therefore change the offsets of some existing nodes.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
- * contain the new property value
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-static inline int fdt_setprop_u64(void *fdt, int nodeoffset, const char *name,
- uint64_t val)
-{
- val = cpu_to_fdt64(val);
- return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val));
-}
-
-/**
- * fdt_setprop_cell - set a property to a single cell value
- *
- * This is an alternative name for fdt_setprop_u32()
- */
-static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name,
- uint32_t val)
-{
- return fdt_setprop_u32(fdt, nodeoffset, name, val);
-}
-
-/**
- * fdt_setprop_string - set a property to a string value
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to change
- * @name: name of the property to change
- * @str: string value for the property
- *
- * fdt_setprop_string() sets the value of the named property in the
- * given node to the given string value (using the length of the
- * string to determine the new length of the property), or creates a
- * new property with that value if it does not already exist.
- *
- * This function may insert or delete data from the blob, and will
- * therefore change the offsets of some existing nodes.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
- * contain the new property value
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-#define fdt_setprop_string(fdt, nodeoffset, name, str) \
- fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
-
-/**
- * fdt_appendprop - append to or create a property
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to change
- * @name: name of the property to append to
- * @val: pointer to data to append to the property value
- * @len: length of the data to append to the property value
- *
- * fdt_appendprop() appends the value to the named property in the
- * given node, creating the property if it does not already exist.
- *
- * This function may insert data into the blob, and will therefore
- * change the offsets of some existing nodes.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
- * contain the new property value
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-int fdt_appendprop(void *fdt, int nodeoffset, const char *name,
- const void *val, int len);
-
-/**
- * fdt_appendprop_u32 - append a 32-bit integer value to a property
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to change
- * @name: name of the property to change
- * @val: 32-bit integer value to append to the property (native endian)
- *
- * fdt_appendprop_u32() appends the given 32-bit integer value
- * (converting to big-endian if necessary) to the value of the named
- * property in the given node, or creates a new property with that
- * value if it does not already exist.
- *
- * This function may insert data into the blob, and will therefore
- * change the offsets of some existing nodes.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
- * contain the new property value
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-static inline int fdt_appendprop_u32(void *fdt, int nodeoffset,
- const char *name, uint32_t val)
-{
- val = cpu_to_fdt32(val);
- return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val));
-}
-
-/**
- * fdt_appendprop_u64 - append a 64-bit integer value to a property
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to change
- * @name: name of the property to change
- * @val: 64-bit integer value to append to the property (native endian)
- *
- * fdt_appendprop_u64() appends the given 64-bit integer value
- * (converting to big-endian if necessary) to the value of the named
- * property in the given node, or creates a new property with that
- * value if it does not already exist.
- *
- * This function may insert data into the blob, and will therefore
- * change the offsets of some existing nodes.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
- * contain the new property value
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-static inline int fdt_appendprop_u64(void *fdt, int nodeoffset,
- const char *name, uint64_t val)
-{
- val = cpu_to_fdt64(val);
- return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val));
-}
-
-/**
- * fdt_appendprop_cell - append a single cell value to a property
- *
- * This is an alternative name for fdt_appendprop_u32()
- */
-static inline int fdt_appendprop_cell(void *fdt, int nodeoffset,
- const char *name, uint32_t val)
-{
- return fdt_appendprop_u32(fdt, nodeoffset, name, val);
-}
-
-/**
- * fdt_appendprop_string - append a string to a property
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to change
- * @name: name of the property to change
- * @str: string value to append to the property
- *
- * fdt_appendprop_string() appends the given string to the value of
- * the named property in the given node, or creates a new property
- * with that value if it does not already exist.
- *
- * This function may insert data into the blob, and will therefore
- * change the offsets of some existing nodes.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
- * contain the new property value
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-#define fdt_appendprop_string(fdt, nodeoffset, name, str) \
- fdt_appendprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
-
-/**
- * fdt_delprop - delete a property
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node whose property to nop
- * @name: name of the property to nop
- *
- * fdt_del_property() will delete the given property.
- *
- * This function will delete data from the blob, and will therefore
- * change the offsets of some existing nodes.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_NOTFOUND, node does not have the named property
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-int fdt_delprop(void *fdt, int nodeoffset, const char *name);
-
-/**
- * fdt_add_subnode_namelen - creates a new node based on substring
- * @fdt: pointer to the device tree blob
- * @parentoffset: structure block offset of a node
- * @name: name of the subnode to locate
- * @namelen: number of characters of name to consider
- *
- * Identical to fdt_add_subnode(), but use only the first namelen
- * characters of name as the name of the new node. This is useful for
- * creating subnodes based on a portion of a larger string, such as a
- * full path.
- */
-int fdt_add_subnode_namelen(void *fdt, int parentoffset,
- const char *name, int namelen);
-
-/**
- * fdt_add_subnode - creates a new node
- * @fdt: pointer to the device tree blob
- * @parentoffset: structure block offset of a node
- * @name: name of the subnode to locate
- *
- * fdt_add_subnode() creates a new node as a subnode of the node at
- * structure block offset parentoffset, with the given name (which
- * should include the unit address, if any).
- *
- * This function will insert data into the blob, and will therefore
- * change the offsets of some existing nodes.
-
- * returns:
- * structure block offset of the created nodeequested subnode (>=0), on success
- * -FDT_ERR_NOTFOUND, if the requested subnode does not exist
- * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag
- * -FDT_ERR_EXISTS, if the node at parentoffset already has a subnode of
- * the given name
- * -FDT_ERR_NOSPACE, if there is insufficient free space in the
- * blob to contain the new node
- * -FDT_ERR_NOSPACE
- * -FDT_ERR_BADLAYOUT
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings.
- */
-int fdt_add_subnode(void *fdt, int parentoffset, const char *name);
-
-/**
- * fdt_del_node - delete a node (subtree)
- * @fdt: pointer to the device tree blob
- * @nodeoffset: offset of the node to nop
- *
- * fdt_del_node() will remove the given node, including all its
- * subnodes if any, from the blob.
- *
- * This function will delete data from the blob, and will therefore
- * change the offsets of some existing nodes.
- *
- * returns:
- * 0, on success
- * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
- * -FDT_ERR_BADLAYOUT,
- * -FDT_ERR_BADMAGIC,
- * -FDT_ERR_BADVERSION,
- * -FDT_ERR_BADSTATE,
- * -FDT_ERR_BADSTRUCTURE,
- * -FDT_ERR_TRUNCATED, standard meanings
- */
-int fdt_del_node(void *fdt, int nodeoffset);
-
-/**********************************************************************/
-/* Debugging / informational functions */
-/**********************************************************************/
-
-const char *fdt_strerror(int errval);
-
-#endif /* _LIBFDT_H */
+#ifndef _LIBFDT_H\r
+#define _LIBFDT_H\r
+/*\r
+ * libfdt - Flat Device Tree manipulation\r
+ * Copyright (C) 2006 David Gibson, IBM Corporation.\r
+ *\r
+ * libfdt is dual licensed: you can use it either under the terms of\r
+ * the GPL, or the BSD license, at your option.\r
+ *\r
+ * a) This library is free software; you can redistribute it and/or\r
+ * modify it under the terms of the GNU General Public License as\r
+ * published by the Free Software Foundation; either version 2 of the\r
+ * License, or (at your option) any later version.\r
+ *\r
+ * This library is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ * You should have received a copy of the GNU General Public\r
+ * License along with this library; if not, write to the Free\r
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,\r
+ * MA 02110-1301 USA\r
+ *\r
+ * Alternatively,\r
+ *\r
+ * b) Redistribution and use in source and binary forms, with or\r
+ * without modification, are permitted provided that the following\r
+ * conditions are met:\r
+ *\r
+ * 1. Redistributions of source code must retain the above\r
+ * copyright notice, this list of conditions and the following\r
+ * disclaimer.\r
+ * 2. Redistributions in binary form must reproduce the above\r
+ * copyright notice, this list of conditions and the following\r
+ * disclaimer in the documentation and/or other materials\r
+ * provided with the distribution.\r
+ *\r
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND\r
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,\r
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF\r
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\r
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR\r
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\r
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT\r
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\r
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR\r
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,\r
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
+ */\r
+\r
+#include <libfdt_env.h>\r
+#include <fdt.h>\r
+\r
+#define FDT_FIRST_SUPPORTED_VERSION 0x10\r
+#define FDT_LAST_SUPPORTED_VERSION 0x11\r
+\r
+/* Error codes: informative error codes */\r
+#define FDT_ERR_NOTFOUND 1\r
+ /* FDT_ERR_NOTFOUND: The requested node or property does not exist */\r
+#define FDT_ERR_EXISTS 2\r
+ /* FDT_ERR_EXISTS: Attemped to create a node or property which\r
+ * already exists */\r
+#define FDT_ERR_NOSPACE 3\r
+ /* FDT_ERR_NOSPACE: Operation needed to expand the device\r
+ * tree, but its buffer did not have sufficient space to\r
+ * contain the expanded tree. Use fdt_open_into() to move the\r
+ * device tree to a buffer with more space. */\r
+\r
+/* Error codes: codes for bad parameters */\r
+#define FDT_ERR_BADOFFSET 4\r
+ /* FDT_ERR_BADOFFSET: Function was passed a structure block\r
+ * offset which is out-of-bounds, or which points to an\r
+ * unsuitable part of the structure for the operation. */\r
+#define FDT_ERR_BADPATH 5\r
+ /* FDT_ERR_BADPATH: Function was passed a badly formatted path\r
+ * (e.g. missing a leading / for a function which requires an\r
+ * absolute path) */\r
+#define FDT_ERR_BADPHANDLE 6\r
+ /* FDT_ERR_BADPHANDLE: Function was passed an invalid phandle\r
+ * value. phandle values of 0 and -1 are not permitted. */\r
+#define FDT_ERR_BADSTATE 7\r
+ /* FDT_ERR_BADSTATE: Function was passed an incomplete device\r
+ * tree created by the sequential-write functions, which is\r
+ * not sufficiently complete for the requested operation. */\r
+\r
+/* Error codes: codes for bad device tree blobs */\r
+#define FDT_ERR_TRUNCATED 8\r
+ /* FDT_ERR_TRUNCATED: Structure block of the given device tree\r
+ * ends without an FDT_END tag. */\r
+#define FDT_ERR_BADMAGIC 9\r
+ /* FDT_ERR_BADMAGIC: Given "device tree" appears not to be a\r
+ * device tree at all - it is missing the flattened device\r
+ * tree magic number. */\r
+#define FDT_ERR_BADVERSION 10\r
+ /* FDT_ERR_BADVERSION: Given device tree has a version which\r
+ * can't be handled by the requested operation. For\r
+ * read-write functions, this may mean that fdt_open_into() is\r
+ * required to convert the tree to the expected version. */\r
+#define FDT_ERR_BADSTRUCTURE 11\r
+ /* FDT_ERR_BADSTRUCTURE: Given device tree has a corrupt\r
+ * structure block or other serious error (e.g. misnested\r
+ * nodes, or subnodes preceding properties). */\r
+#define FDT_ERR_BADLAYOUT 12\r
+ /* FDT_ERR_BADLAYOUT: For read-write functions, the given\r
+ * device tree has it's sub-blocks in an order that the\r
+ * function can't handle (memory reserve map, then structure,\r
+ * then strings). Use fdt_open_into() to reorganize the tree\r
+ * into a form suitable for the read-write operations. */\r
+\r
+/* "Can't happen" error indicating a bug in libfdt */\r
+#define FDT_ERR_INTERNAL 13\r
+ /* FDT_ERR_INTERNAL: libfdt has failed an internal assertion.\r
+ * Should never be returned, if it is, it indicates a bug in\r
+ * libfdt itself. */\r
+\r
+#define FDT_ERR_MAX 13\r
+\r
+/**********************************************************************/\r
+/* Low-level functions (you probably don't need these) */\r
+/**********************************************************************/\r
+\r
+const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen);\r
+static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen)\r
+{\r
+ return (void *)(uintptr_t)fdt_offset_ptr(fdt, offset, checklen);\r
+}\r
+\r
+uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset);\r
+\r
+/**********************************************************************/\r
+/* Traversal functions */\r
+/**********************************************************************/\r
+\r
+int fdt_next_node(const void *fdt, int offset, int *depth);\r
+\r
+/**********************************************************************/\r
+/* General functions */\r
+/**********************************************************************/\r
+\r
+#define fdt_get_header(fdt, field) \\r
+ (fdt32_to_cpu(((const struct fdt_header *)(fdt))->field))\r
+#define fdt_magic(fdt) (fdt_get_header(fdt, magic))\r
+#define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize))\r
+#define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct))\r
+#define fdt_off_dt_strings(fdt) (fdt_get_header(fdt, off_dt_strings))\r
+#define fdt_off_mem_rsvmap(fdt) (fdt_get_header(fdt, off_mem_rsvmap))\r
+#define fdt_version(fdt) (fdt_get_header(fdt, version))\r
+#define fdt_last_comp_version(fdt) (fdt_get_header(fdt, last_comp_version))\r
+#define fdt_boot_cpuid_phys(fdt) (fdt_get_header(fdt, boot_cpuid_phys))\r
+#define fdt_size_dt_strings(fdt) (fdt_get_header(fdt, size_dt_strings))\r
+#define fdt_size_dt_struct(fdt) (fdt_get_header(fdt, size_dt_struct))\r
+\r
+#define __fdt_set_hdr(name) \\r
+ static inline void fdt_set_##name(void *fdt, uint32_t val) \\r
+ { \\r
+ struct fdt_header *fdth = (struct fdt_header*)fdt; \\r
+ fdth->name = cpu_to_fdt32(val); \\r
+ }\r
+__fdt_set_hdr(magic);\r
+__fdt_set_hdr(totalsize);\r
+__fdt_set_hdr(off_dt_struct);\r
+__fdt_set_hdr(off_dt_strings);\r
+__fdt_set_hdr(off_mem_rsvmap);\r
+__fdt_set_hdr(version);\r
+__fdt_set_hdr(last_comp_version);\r
+__fdt_set_hdr(boot_cpuid_phys);\r
+__fdt_set_hdr(size_dt_strings);\r
+__fdt_set_hdr(size_dt_struct);\r
+#undef __fdt_set_hdr\r
+\r
+/**\r
+ * fdt_check_header - sanity check a device tree or possible device tree\r
+ * @fdt: pointer to data which might be a flattened device tree\r
+ *\r
+ * fdt_check_header() checks that the given buffer contains what\r
+ * appears to be a flattened device tree with sane information in its\r
+ * header.\r
+ *\r
+ * returns:\r
+ * 0, if the buffer appears to contain a valid device tree\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE, standard meanings, as above\r
+ */\r
+int fdt_check_header(const void *fdt);\r
+\r
+/**\r
+ * fdt_move - move a device tree around in memory\r
+ * @fdt: pointer to the device tree to move\r
+ * @buf: pointer to memory where the device is to be moved\r
+ * @bufsize: size of the memory space at buf\r
+ *\r
+ * fdt_move() relocates, if possible, the device tree blob located at\r
+ * fdt to the buffer at buf of size bufsize. The buffer may overlap\r
+ * with the existing device tree blob at fdt. Therefore,\r
+ * fdt_move(fdt, fdt, fdt_totalsize(fdt))\r
+ * should always succeed.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, bufsize is insufficient to contain the device tree\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE, standard meanings\r
+ */\r
+int fdt_move(const void *fdt, void *buf, int bufsize);\r
+\r
+/**********************************************************************/\r
+/* Read-only functions */\r
+/**********************************************************************/\r
+\r
+/**\r
+ * fdt_string - retrieve a string from the strings block of a device tree\r
+ * @fdt: pointer to the device tree blob\r
+ * @stroffset: offset of the string within the strings block (native endian)\r
+ *\r
+ * fdt_string() retrieves a pointer to a single string from the\r
+ * strings block of the device tree blob at fdt.\r
+ *\r
+ * returns:\r
+ * a pointer to the string, on success\r
+ * NULL, if stroffset is out of bounds\r
+ */\r
+const char *fdt_string(const void *fdt, int stroffset);\r
+\r
+/**\r
+ * fdt_num_mem_rsv - retrieve the number of memory reserve map entries\r
+ * @fdt: pointer to the device tree blob\r
+ *\r
+ * Returns the number of entries in the device tree blob's memory\r
+ * reservation map. This does not include the terminating 0,0 entry\r
+ * or any other (0,0) entries reserved for expansion.\r
+ *\r
+ * returns:\r
+ * the number of entries\r
+ */\r
+int fdt_num_mem_rsv(const void *fdt);\r
+\r
+/**\r
+ * fdt_get_mem_rsv - retrieve one memory reserve map entry\r
+ * @fdt: pointer to the device tree blob\r
+ * @address, @size: pointers to 64-bit variables\r
+ *\r
+ * On success, *address and *size will contain the address and size of\r
+ * the n-th reserve map entry from the device tree blob, in\r
+ * native-endian format.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE, standard meanings\r
+ */\r
+int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size);\r
+\r
+/**\r
+ * fdt_subnode_offset_namelen - find a subnode based on substring\r
+ * @fdt: pointer to the device tree blob\r
+ * @parentoffset: structure block offset of a node\r
+ * @name: name of the subnode to locate\r
+ * @namelen: number of characters of name to consider\r
+ *\r
+ * Identical to fdt_subnode_offset(), but only examine the first\r
+ * namelen characters of name for matching the subnode name. This is\r
+ * useful for finding subnodes based on a portion of a larger string,\r
+ * such as a full path.\r
+ */\r
+int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,\r
+ const char *name, int namelen);\r
+/**\r
+ * fdt_subnode_offset - find a subnode of a given node\r
+ * @fdt: pointer to the device tree blob\r
+ * @parentoffset: structure block offset of a node\r
+ * @name: name of the subnode to locate\r
+ *\r
+ * fdt_subnode_offset() finds a subnode of the node at structure block\r
+ * offset parentoffset with the given name. name may include a unit\r
+ * address, in which case fdt_subnode_offset() will find the subnode\r
+ * with that unit address, or the unit address may be omitted, in\r
+ * which case fdt_subnode_offset() will find an arbitrary subnode\r
+ * whose name excluding unit address matches the given name.\r
+ *\r
+ * returns:\r
+ * structure block offset of the requested subnode (>=0), on success\r
+ * -FDT_ERR_NOTFOUND, if the requested subnode does not exist\r
+ * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings.\r
+ */\r
+int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name);\r
+\r
+/**\r
+ * fdt_path_offset - find a tree node by its full path\r
+ * @fdt: pointer to the device tree blob\r
+ * @path: full path of the node to locate\r
+ *\r
+ * fdt_path_offset() finds a node of a given path in the device tree.\r
+ * Each path component may omit the unit address portion, but the\r
+ * results of this are undefined if any such path component is\r
+ * ambiguous (that is if there are multiple nodes at the relevant\r
+ * level matching the given component, differentiated only by unit\r
+ * address).\r
+ *\r
+ * returns:\r
+ * structure block offset of the node with the requested path (>=0), on success\r
+ * -FDT_ERR_BADPATH, given path does not begin with '/' or is invalid\r
+ * -FDT_ERR_NOTFOUND, if the requested node does not exist\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings.\r
+ */\r
+int fdt_path_offset(const void *fdt, const char *path);\r
+\r
+/**\r
+ * fdt_get_name - retrieve the name of a given node\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: structure block offset of the starting node\r
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL\r
+ *\r
+ * fdt_get_name() retrieves the name (including unit address) of the\r
+ * device tree node at structure block offset nodeoffset. If lenp is\r
+ * non-NULL, the length of this name is also returned, in the integer\r
+ * pointed to by lenp.\r
+ *\r
+ * returns:\r
+ * pointer to the node's name, on success\r
+ * If lenp is non-NULL, *lenp contains the length of that name (>=0)\r
+ * NULL, on error\r
+ * if lenp is non-NULL *lenp contains an error code (<0):\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE, standard meanings\r
+ */\r
+const char *fdt_get_name(const void *fdt, int nodeoffset, int *lenp);\r
+\r
+/**\r
+ * fdt_first_property_offset - find the offset of a node's first property\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: structure block offset of a node\r
+ *\r
+ * fdt_first_property_offset() finds the first property of the node at\r
+ * the given structure block offset.\r
+ *\r
+ * returns:\r
+ * structure block offset of the property (>=0), on success\r
+ * -FDT_ERR_NOTFOUND, if the requested node has no properties\r
+ * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings.\r
+ */\r
+int fdt_first_property_offset(const void *fdt, int nodeoffset);\r
+\r
+/**\r
+ * fdt_next_property_offset - step through a node's properties\r
+ * @fdt: pointer to the device tree blob\r
+ * @offset: structure block offset of a property\r
+ *\r
+ * fdt_next_property_offset() finds the property immediately after the\r
+ * one at the given structure block offset. This will be a property\r
+ * of the same node as the given property.\r
+ *\r
+ * returns:\r
+ * structure block offset of the next property (>=0), on success\r
+ * -FDT_ERR_NOTFOUND, if the given property is the last in its node\r
+ * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_PROP tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings.\r
+ */\r
+int fdt_next_property_offset(const void *fdt, int offset);\r
+\r
+/**\r
+ * fdt_get_property_by_offset - retrieve the property at a given offset\r
+ * @fdt: pointer to the device tree blob\r
+ * @offset: offset of the property to retrieve\r
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL\r
+ *\r
+ * fdt_get_property_by_offset() retrieves a pointer to the\r
+ * fdt_property structure within the device tree blob at the given\r
+ * offset. If lenp is non-NULL, the length of the property value is\r
+ * also returned, in the integer pointed to by lenp.\r
+ *\r
+ * returns:\r
+ * pointer to the structure representing the property\r
+ * if lenp is non-NULL, *lenp contains the length of the property\r
+ * value (>=0)\r
+ * NULL, on error\r
+ * if lenp is non-NULL, *lenp contains an error code (<0):\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+const struct fdt_property *fdt_get_property_by_offset(const void *fdt,\r
+ int offset,\r
+ int *lenp);\r
+\r
+/**\r
+ * fdt_get_property_namelen - find a property based on substring\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to find\r
+ * @name: name of the property to find\r
+ * @namelen: number of characters of name to consider\r
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL\r
+ *\r
+ * Identical to fdt_get_property_namelen(), but only examine the first\r
+ * namelen characters of name for matching the property name.\r
+ */\r
+const struct fdt_property *fdt_get_property_namelen(const void *fdt,\r
+ int nodeoffset,\r
+ const char *name,\r
+ int namelen, int *lenp);\r
+\r
+/**\r
+ * fdt_get_property - find a given property in a given node\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to find\r
+ * @name: name of the property to find\r
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL\r
+ *\r
+ * fdt_get_property() retrieves a pointer to the fdt_property\r
+ * structure within the device tree blob corresponding to the property\r
+ * named 'name' of the node at offset nodeoffset. If lenp is\r
+ * non-NULL, the length of the property value is also returned, in the\r
+ * integer pointed to by lenp.\r
+ *\r
+ * returns:\r
+ * pointer to the structure representing the property\r
+ * if lenp is non-NULL, *lenp contains the length of the property\r
+ * value (>=0)\r
+ * NULL, on error\r
+ * if lenp is non-NULL, *lenp contains an error code (<0):\r
+ * -FDT_ERR_NOTFOUND, node does not have named property\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+const struct fdt_property *fdt_get_property(const void *fdt, int nodeoffset,\r
+ const char *name, int *lenp);\r
+static inline struct fdt_property *fdt_get_property_w(void *fdt, int nodeoffset,\r
+ const char *name,\r
+ int *lenp)\r
+{\r
+ return (struct fdt_property *)(uintptr_t)\r
+ fdt_get_property(fdt, nodeoffset, name, lenp);\r
+}\r
+\r
+/**\r
+ * fdt_getprop_by_offset - retrieve the value of a property at a given offset\r
+ * @fdt: pointer to the device tree blob\r
+ * @ffset: offset of the property to read\r
+ * @namep: pointer to a string variable (will be overwritten) or NULL\r
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL\r
+ *\r
+ * fdt_getprop_by_offset() retrieves a pointer to the value of the\r
+ * property at structure block offset 'offset' (this will be a pointer\r
+ * to within the device blob itself, not a copy of the value). If\r
+ * lenp is non-NULL, the length of the property value is also\r
+ * returned, in the integer pointed to by lenp. If namep is non-NULL,\r
+ * the property's namne will also be returned in the char * pointed to\r
+ * by namep (this will be a pointer to within the device tree's string\r
+ * block, not a new copy of the name).\r
+ *\r
+ * returns:\r
+ * pointer to the property's value\r
+ * if lenp is non-NULL, *lenp contains the length of the property\r
+ * value (>=0)\r
+ * if namep is non-NULL *namep contiains a pointer to the property\r
+ * name.\r
+ * NULL, on error\r
+ * if lenp is non-NULL, *lenp contains an error code (<0):\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+const void *fdt_getprop_by_offset(const void *fdt, int offset,\r
+ const char **namep, int *lenp);\r
+\r
+/**\r
+ * fdt_getprop_namelen - get property value based on substring\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to find\r
+ * @name: name of the property to find\r
+ * @namelen: number of characters of name to consider\r
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL\r
+ *\r
+ * Identical to fdt_getprop(), but only examine the first namelen\r
+ * characters of name for matching the property name.\r
+ */\r
+const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,\r
+ const char *name, int namelen, int *lenp);\r
+\r
+/**\r
+ * fdt_getprop - retrieve the value of a given property\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to find\r
+ * @name: name of the property to find\r
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL\r
+ *\r
+ * fdt_getprop() retrieves a pointer to the value of the property\r
+ * named 'name' of the node at offset nodeoffset (this will be a\r
+ * pointer to within the device blob itself, not a copy of the value).\r
+ * If lenp is non-NULL, the length of the property value is also\r
+ * returned, in the integer pointed to by lenp.\r
+ *\r
+ * returns:\r
+ * pointer to the property's value\r
+ * if lenp is non-NULL, *lenp contains the length of the property\r
+ * value (>=0)\r
+ * NULL, on error\r
+ * if lenp is non-NULL, *lenp contains an error code (<0):\r
+ * -FDT_ERR_NOTFOUND, node does not have named property\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+const void *fdt_getprop(const void *fdt, int nodeoffset,\r
+ const char *name, int *lenp);\r
+static inline void *fdt_getprop_w(void *fdt, int nodeoffset,\r
+ const char *name, int *lenp)\r
+{\r
+ return (void *)(uintptr_t)fdt_getprop(fdt, nodeoffset, name, lenp);\r
+}\r
+\r
+/**\r
+ * fdt_get_phandle - retrieve the phandle of a given node\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: structure block offset of the node\r
+ *\r
+ * fdt_get_phandle() retrieves the phandle of the device tree node at\r
+ * structure block offset nodeoffset.\r
+ *\r
+ * returns:\r
+ * the phandle of the node at nodeoffset, on success (!= 0, != -1)\r
+ * 0, if the node has no phandle, or another error occurs\r
+ */\r
+uint32_t fdt_get_phandle(const void *fdt, int nodeoffset);\r
+\r
+/**\r
+ * fdt_get_alias_namelen - get alias based on substring\r
+ * @fdt: pointer to the device tree blob\r
+ * @name: name of the alias th look up\r
+ * @namelen: number of characters of name to consider\r
+ *\r
+ * Identical to fdt_get_alias(), but only examine the first namelen\r
+ * characters of name for matching the alias name.\r
+ */\r
+const char *fdt_get_alias_namelen(const void *fdt,\r
+ const char *name, int namelen);\r
+\r
+/**\r
+ * fdt_get_alias - retreive the path referenced by a given alias\r
+ * @fdt: pointer to the device tree blob\r
+ * @name: name of the alias th look up\r
+ *\r
+ * fdt_get_alias() retrieves the value of a given alias. That is, the\r
+ * value of the property named 'name' in the node /aliases.\r
+ *\r
+ * returns:\r
+ * a pointer to the expansion of the alias named 'name', of it exists\r
+ * NULL, if the given alias or the /aliases node does not exist\r
+ */\r
+const char *fdt_get_alias(const void *fdt, const char *name);\r
+\r
+/**\r
+ * fdt_get_path - determine the full path of a node\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose path to find\r
+ * @buf: character buffer to contain the returned path (will be overwritten)\r
+ * @buflen: size of the character buffer at buf\r
+ *\r
+ * fdt_get_path() computes the full path of the node at offset\r
+ * nodeoffset, and records that path in the buffer at buf.\r
+ *\r
+ * NOTE: This function is expensive, as it must scan the device tree\r
+ * structure from the start to nodeoffset.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * buf contains the absolute path of the node at\r
+ * nodeoffset, as a NUL-terminated string.\r
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r
+ * -FDT_ERR_NOSPACE, the path of the given node is longer than (bufsize-1)\r
+ * characters and will not fit in the given buffer.\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE, standard meanings\r
+ */\r
+int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen);\r
+\r
+/**\r
+ * fdt_supernode_atdepth_offset - find a specific ancestor of a node\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose parent to find\r
+ * @supernodedepth: depth of the ancestor to find\r
+ * @nodedepth: pointer to an integer variable (will be overwritten) or NULL\r
+ *\r
+ * fdt_supernode_atdepth_offset() finds an ancestor of the given node\r
+ * at a specific depth from the root (where the root itself has depth\r
+ * 0, its immediate subnodes depth 1 and so forth). So\r
+ * fdt_supernode_atdepth_offset(fdt, nodeoffset, 0, NULL);\r
+ * will always return 0, the offset of the root node. If the node at\r
+ * nodeoffset has depth D, then:\r
+ * fdt_supernode_atdepth_offset(fdt, nodeoffset, D, NULL);\r
+ * will return nodeoffset itself.\r
+ *\r
+ * NOTE: This function is expensive, as it must scan the device tree\r
+ * structure from the start to nodeoffset.\r
+ *\r
+ * returns:\r
+\r
+ * structure block offset of the node at node offset's ancestor\r
+ * of depth supernodedepth (>=0), on success\r
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r
+* -FDT_ERR_NOTFOUND, supernodedepth was greater than the depth of nodeoffset\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE, standard meanings\r
+ */\r
+int fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset,\r
+ int supernodedepth, int *nodedepth);\r
+\r
+/**\r
+ * fdt_node_depth - find the depth of a given node\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose parent to find\r
+ *\r
+ * fdt_node_depth() finds the depth of a given node. The root node\r
+ * has depth 0, its immediate subnodes depth 1 and so forth.\r
+ *\r
+ * NOTE: This function is expensive, as it must scan the device tree\r
+ * structure from the start to nodeoffset.\r
+ *\r
+ * returns:\r
+ * depth of the node at nodeoffset (>=0), on success\r
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE, standard meanings\r
+ */\r
+int fdt_node_depth(const void *fdt, int nodeoffset);\r
+\r
+/**\r
+ * fdt_parent_offset - find the parent of a given node\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose parent to find\r
+ *\r
+ * fdt_parent_offset() locates the parent node of a given node (that\r
+ * is, it finds the offset of the node which contains the node at\r
+ * nodeoffset as a subnode).\r
+ *\r
+ * NOTE: This function is expensive, as it must scan the device tree\r
+ * structure from the start to nodeoffset, *twice*.\r
+ *\r
+ * returns:\r
+ * structure block offset of the parent of the node at nodeoffset\r
+ * (>=0), on success\r
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE, standard meanings\r
+ */\r
+int fdt_parent_offset(const void *fdt, int nodeoffset);\r
+\r
+/**\r
+ * fdt_node_offset_by_prop_value - find nodes with a given property value\r
+ * @fdt: pointer to the device tree blob\r
+ * @startoffset: only find nodes after this offset\r
+ * @propname: property name to check\r
+ * @propval: property value to search for\r
+ * @proplen: length of the value in propval\r
+ *\r
+ * fdt_node_offset_by_prop_value() returns the offset of the first\r
+ * node after startoffset, which has a property named propname whose\r
+ * value is of length proplen and has value equal to propval; or if\r
+ * startoffset is -1, the very first such node in the tree.\r
+ *\r
+ * To iterate through all nodes matching the criterion, the following\r
+ * idiom can be used:\r
+ * offset = fdt_node_offset_by_prop_value(fdt, -1, propname,\r
+ * propval, proplen);\r
+ * while (offset != -FDT_ERR_NOTFOUND) {\r
+ * // other code here\r
+ * offset = fdt_node_offset_by_prop_value(fdt, offset, propname,\r
+ * propval, proplen);\r
+ * }\r
+ *\r
+ * Note the -1 in the first call to the function, if 0 is used here\r
+ * instead, the function will never locate the root node, even if it\r
+ * matches the criterion.\r
+ *\r
+ * returns:\r
+ * structure block offset of the located node (>= 0, >startoffset),\r
+ * on success\r
+ * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the\r
+ * tree after startoffset\r
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE, standard meanings\r
+ */\r
+int fdt_node_offset_by_prop_value(const void *fdt, int startoffset,\r
+ const char *propname,\r
+ const void *propval, int proplen);\r
+\r
+/**\r
+ * fdt_node_offset_by_phandle - find the node with a given phandle\r
+ * @fdt: pointer to the device tree blob\r
+ * @phandle: phandle value\r
+ *\r
+ * fdt_node_offset_by_phandle() returns the offset of the node\r
+ * which has the given phandle value. If there is more than one node\r
+ * in the tree with the given phandle (an invalid tree), results are\r
+ * undefined.\r
+ *\r
+ * returns:\r
+ * structure block offset of the located node (>= 0), on success\r
+ * -FDT_ERR_NOTFOUND, no node with that phandle exists\r
+ * -FDT_ERR_BADPHANDLE, given phandle value was invalid (0 or -1)\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE, standard meanings\r
+ */\r
+int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle);\r
+\r
+/**\r
+ * fdt_node_check_compatible: check a node's compatible property\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of a tree node\r
+ * @compatible: string to match against\r
+ *\r
+ *\r
+ * fdt_node_check_compatible() returns 0 if the given node contains a\r
+ * 'compatible' property with the given string as one of its elements,\r
+ * it returns non-zero otherwise, or on error.\r
+ *\r
+ * returns:\r
+ * 0, if the node has a 'compatible' property listing the given string\r
+ * 1, if the node has a 'compatible' property, but it does not list\r
+ * the given string\r
+ * -FDT_ERR_NOTFOUND, if the given node has no 'compatible' property\r
+ * -FDT_ERR_BADOFFSET, if nodeoffset does not refer to a BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE, standard meanings\r
+ */\r
+int fdt_node_check_compatible(const void *fdt, int nodeoffset,\r
+ const char *compatible);\r
+\r
+/**\r
+ * fdt_node_offset_by_compatible - find nodes with a given 'compatible' value\r
+ * @fdt: pointer to the device tree blob\r
+ * @startoffset: only find nodes after this offset\r
+ * @compatible: 'compatible' string to match against\r
+ *\r
+ * fdt_node_offset_by_compatible() returns the offset of the first\r
+ * node after startoffset, which has a 'compatible' property which\r
+ * lists the given compatible string; or if startoffset is -1, the\r
+ * very first such node in the tree.\r
+ *\r
+ * To iterate through all nodes matching the criterion, the following\r
+ * idiom can be used:\r
+ * offset = fdt_node_offset_by_compatible(fdt, -1, compatible);\r
+ * while (offset != -FDT_ERR_NOTFOUND) {\r
+ * // other code here\r
+ * offset = fdt_node_offset_by_compatible(fdt, offset, compatible);\r
+ * }\r
+ *\r
+ * Note the -1 in the first call to the function, if 0 is used here\r
+ * instead, the function will never locate the root node, even if it\r
+ * matches the criterion.\r
+ *\r
+ * returns:\r
+ * structure block offset of the located node (>= 0, >startoffset),\r
+ * on success\r
+ * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the\r
+ * tree after startoffset\r
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE, standard meanings\r
+ */\r
+int fdt_node_offset_by_compatible(const void *fdt, int startoffset,\r
+ const char *compatible);\r
+\r
+/**********************************************************************/\r
+/* Write-in-place functions */\r
+/**********************************************************************/\r
+\r
+/**\r
+ * fdt_setprop_inplace - change a property's value, but not its size\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to change\r
+ * @name: name of the property to change\r
+ * @val: pointer to data to replace the property value with\r
+ * @len: length of the property value\r
+ *\r
+ * fdt_setprop_inplace() replaces the value of a given property with\r
+ * the data in val, of length len. This function cannot change the\r
+ * size of a property, and so will only work if len is equal to the\r
+ * current length of the property.\r
+ *\r
+ * This function will alter only the bytes in the blob which contain\r
+ * the given property value, and will not alter or move any other part\r
+ * of the tree.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, if len is not equal to the property's current length\r
+ * -FDT_ERR_NOTFOUND, node does not have the named property\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,\r
+ const void *val, int len);\r
+\r
+/**\r
+ * fdt_setprop_inplace_u32 - change the value of a 32-bit integer property\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to change\r
+ * @name: name of the property to change\r
+ * @val: 32-bit integer value to replace the property with\r
+ *\r
+ * fdt_setprop_inplace_u32() replaces the value of a given property\r
+ * with the 32-bit integer value in val, converting val to big-endian\r
+ * if necessary. This function cannot change the size of a property,\r
+ * and so will only work if the property already exists and has length\r
+ * 4.\r
+ *\r
+ * This function will alter only the bytes in the blob which contain\r
+ * the given property value, and will not alter or move any other part\r
+ * of the tree.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, if the property's length is not equal to 4\r
+ * -FDT_ERR_NOTFOUND, node does not have the named property\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+static inline int fdt_setprop_inplace_u32(void *fdt, int nodeoffset,\r
+ const char *name, uint32_t val)\r
+{\r
+ val = cpu_to_fdt32(val);\r
+ return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val));\r
+}\r
+\r
+/**\r
+ * fdt_setprop_inplace_u64 - change the value of a 64-bit integer property\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to change\r
+ * @name: name of the property to change\r
+ * @val: 64-bit integer value to replace the property with\r
+ *\r
+ * fdt_setprop_inplace_u64() replaces the value of a given property\r
+ * with the 64-bit integer value in val, converting val to big-endian\r
+ * if necessary. This function cannot change the size of a property,\r
+ * and so will only work if the property already exists and has length\r
+ * 8.\r
+ *\r
+ * This function will alter only the bytes in the blob which contain\r
+ * the given property value, and will not alter or move any other part\r
+ * of the tree.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, if the property's length is not equal to 8\r
+ * -FDT_ERR_NOTFOUND, node does not have the named property\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+static inline int fdt_setprop_inplace_u64(void *fdt, int nodeoffset,\r
+ const char *name, uint64_t val)\r
+{\r
+ val = cpu_to_fdt64(val);\r
+ return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val));\r
+}\r
+\r
+/**\r
+ * fdt_setprop_inplace_cell - change the value of a single-cell property\r
+ *\r
+ * This is an alternative name for fdt_setprop_inplace_u32()\r
+ */\r
+static inline int fdt_setprop_inplace_cell(void *fdt, int nodeoffset,\r
+ const char *name, uint32_t val)\r
+{\r
+ return fdt_setprop_inplace_u32(fdt, nodeoffset, name, val);\r
+}\r
+\r
+/**\r
+ * fdt_nop_property - replace a property with nop tags\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to nop\r
+ * @name: name of the property to nop\r
+ *\r
+ * fdt_nop_property() will replace a given property's representation\r
+ * in the blob with FDT_NOP tags, effectively removing it from the\r
+ * tree.\r
+ *\r
+ * This function will alter only the bytes in the blob which contain\r
+ * the property, and will not alter or move any other part of the\r
+ * tree.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOTFOUND, node does not have the named property\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+int fdt_nop_property(void *fdt, int nodeoffset, const char *name);\r
+\r
+/**\r
+ * fdt_nop_node - replace a node (subtree) with nop tags\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node to nop\r
+ *\r
+ * fdt_nop_node() will replace a given node's representation in the\r
+ * blob, including all its subnodes, if any, with FDT_NOP tags,\r
+ * effectively removing it from the tree.\r
+ *\r
+ * This function will alter only the bytes in the blob which contain\r
+ * the node and its properties and subnodes, and will not alter or\r
+ * move any other part of the tree.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+int fdt_nop_node(void *fdt, int nodeoffset);\r
+\r
+/**********************************************************************/\r
+/* Sequential write functions */\r
+/**********************************************************************/\r
+\r
+int fdt_create(void *buf, int bufsize);\r
+int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size);\r
+int fdt_finish_reservemap(void *fdt);\r
+int fdt_begin_node(void *fdt, const char *name);\r
+int fdt_property(void *fdt, const char *name, const void *val, int len);\r
+static inline int fdt_property_u32(void *fdt, const char *name, uint32_t val)\r
+{\r
+ val = cpu_to_fdt32(val);\r
+ return fdt_property(fdt, name, &val, sizeof(val));\r
+}\r
+static inline int fdt_property_u64(void *fdt, const char *name, uint64_t val)\r
+{\r
+ val = cpu_to_fdt64(val);\r
+ return fdt_property(fdt, name, &val, sizeof(val));\r
+}\r
+static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val)\r
+{\r
+ return fdt_property_u32(fdt, name, val);\r
+}\r
+#define fdt_property_string(fdt, name, str) \\r
+ fdt_property(fdt, name, str, strlen(str)+1)\r
+int fdt_end_node(void *fdt);\r
+int fdt_finish(void *fdt);\r
+\r
+/**********************************************************************/\r
+/* Read-write functions */\r
+/**********************************************************************/\r
+\r
+int fdt_create_empty_tree(void *buf, int bufsize);\r
+int fdt_open_into(const void *fdt, void *buf, int bufsize);\r
+int fdt_pack(void *fdt);\r
+\r
+/**\r
+ * fdt_add_mem_rsv - add one memory reserve map entry\r
+ * @fdt: pointer to the device tree blob\r
+ * @address, @size: 64-bit values (native endian)\r
+ *\r
+ * Adds a reserve map entry to the given blob reserving a region at\r
+ * address address of length size.\r
+ *\r
+ * This function will insert data into the reserve map and will\r
+ * therefore change the indexes of some entries in the table.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r
+ * contain the new reservation entry\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size);\r
+\r
+/**\r
+ * fdt_del_mem_rsv - remove a memory reserve map entry\r
+ * @fdt: pointer to the device tree blob\r
+ * @n: entry to remove\r
+ *\r
+ * fdt_del_mem_rsv() removes the n-th memory reserve map entry from\r
+ * the blob.\r
+ *\r
+ * This function will delete data from the reservation table and will\r
+ * therefore change the indexes of some entries in the table.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOTFOUND, there is no entry of the given index (i.e. there\r
+ * are less than n+1 reserve map entries)\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+int fdt_del_mem_rsv(void *fdt, int n);\r
+\r
+/**\r
+ * fdt_set_name - change the name of a given node\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: structure block offset of a node\r
+ * @name: name to give the node\r
+ *\r
+ * fdt_set_name() replaces the name (including unit address, if any)\r
+ * of the given node with the given string. NOTE: this function can't\r
+ * efficiently check if the new name is unique amongst the given\r
+ * node's siblings; results are undefined if this function is invoked\r
+ * with a name equal to one of the given node's siblings.\r
+ *\r
+ * This function may insert or delete data from the blob, and will\r
+ * therefore change the offsets of some existing nodes.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob\r
+ * to contain the new name\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE, standard meanings\r
+ */\r
+int fdt_set_name(void *fdt, int nodeoffset, const char *name);\r
+\r
+/**\r
+ * fdt_setprop - create or change a property\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to change\r
+ * @name: name of the property to change\r
+ * @val: pointer to data to set the property value to\r
+ * @len: length of the property value\r
+ *\r
+ * fdt_setprop() sets the value of the named property in the given\r
+ * node to the given value and length, creating the property if it\r
+ * does not already exist.\r
+ *\r
+ * This function may insert or delete data from the blob, and will\r
+ * therefore change the offsets of some existing nodes.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r
+ * contain the new property value\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+int fdt_setprop(void *fdt, int nodeoffset, const char *name,\r
+ const void *val, int len);\r
+\r
+/**\r
+ * fdt_setprop_u32 - set a property to a 32-bit integer\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to change\r
+ * @name: name of the property to change\r
+ * @val: 32-bit integer value for the property (native endian)\r
+ *\r
+ * fdt_setprop_u32() sets the value of the named property in the given\r
+ * node to the given 32-bit integer value (converting to big-endian if\r
+ * necessary), or creates a new property with that value if it does\r
+ * not already exist.\r
+ *\r
+ * This function may insert or delete data from the blob, and will\r
+ * therefore change the offsets of some existing nodes.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r
+ * contain the new property value\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+static inline int fdt_setprop_u32(void *fdt, int nodeoffset, const char *name,\r
+ uint32_t val)\r
+{\r
+ val = cpu_to_fdt32(val);\r
+ return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val));\r
+}\r
+\r
+/**\r
+ * fdt_setprop_u64 - set a property to a 64-bit integer\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to change\r
+ * @name: name of the property to change\r
+ * @val: 64-bit integer value for the property (native endian)\r
+ *\r
+ * fdt_setprop_u64() sets the value of the named property in the given\r
+ * node to the given 64-bit integer value (converting to big-endian if\r
+ * necessary), or creates a new property with that value if it does\r
+ * not already exist.\r
+ *\r
+ * This function may insert or delete data from the blob, and will\r
+ * therefore change the offsets of some existing nodes.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r
+ * contain the new property value\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+static inline int fdt_setprop_u64(void *fdt, int nodeoffset, const char *name,\r
+ uint64_t val)\r
+{\r
+ val = cpu_to_fdt64(val);\r
+ return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val));\r
+}\r
+\r
+/**\r
+ * fdt_setprop_cell - set a property to a single cell value\r
+ *\r
+ * This is an alternative name for fdt_setprop_u32()\r
+ */\r
+static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name,\r
+ uint32_t val)\r
+{\r
+ return fdt_setprop_u32(fdt, nodeoffset, name, val);\r
+}\r
+\r
+/**\r
+ * fdt_setprop_string - set a property to a string value\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to change\r
+ * @name: name of the property to change\r
+ * @str: string value for the property\r
+ *\r
+ * fdt_setprop_string() sets the value of the named property in the\r
+ * given node to the given string value (using the length of the\r
+ * string to determine the new length of the property), or creates a\r
+ * new property with that value if it does not already exist.\r
+ *\r
+ * This function may insert or delete data from the blob, and will\r
+ * therefore change the offsets of some existing nodes.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r
+ * contain the new property value\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+#define fdt_setprop_string(fdt, nodeoffset, name, str) \\r
+ fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)\r
+\r
+/**\r
+ * fdt_appendprop - append to or create a property\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to change\r
+ * @name: name of the property to append to\r
+ * @val: pointer to data to append to the property value\r
+ * @len: length of the data to append to the property value\r
+ *\r
+ * fdt_appendprop() appends the value to the named property in the\r
+ * given node, creating the property if it does not already exist.\r
+ *\r
+ * This function may insert data into the blob, and will therefore\r
+ * change the offsets of some existing nodes.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r
+ * contain the new property value\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+int fdt_appendprop(void *fdt, int nodeoffset, const char *name,\r
+ const void *val, int len);\r
+\r
+/**\r
+ * fdt_appendprop_u32 - append a 32-bit integer value to a property\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to change\r
+ * @name: name of the property to change\r
+ * @val: 32-bit integer value to append to the property (native endian)\r
+ *\r
+ * fdt_appendprop_u32() appends the given 32-bit integer value\r
+ * (converting to big-endian if necessary) to the value of the named\r
+ * property in the given node, or creates a new property with that\r
+ * value if it does not already exist.\r
+ *\r
+ * This function may insert data into the blob, and will therefore\r
+ * change the offsets of some existing nodes.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r
+ * contain the new property value\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+static inline int fdt_appendprop_u32(void *fdt, int nodeoffset,\r
+ const char *name, uint32_t val)\r
+{\r
+ val = cpu_to_fdt32(val);\r
+ return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val));\r
+}\r
+\r
+/**\r
+ * fdt_appendprop_u64 - append a 64-bit integer value to a property\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to change\r
+ * @name: name of the property to change\r
+ * @val: 64-bit integer value to append to the property (native endian)\r
+ *\r
+ * fdt_appendprop_u64() appends the given 64-bit integer value\r
+ * (converting to big-endian if necessary) to the value of the named\r
+ * property in the given node, or creates a new property with that\r
+ * value if it does not already exist.\r
+ *\r
+ * This function may insert data into the blob, and will therefore\r
+ * change the offsets of some existing nodes.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r
+ * contain the new property value\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+static inline int fdt_appendprop_u64(void *fdt, int nodeoffset,\r
+ const char *name, uint64_t val)\r
+{\r
+ val = cpu_to_fdt64(val);\r
+ return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val));\r
+}\r
+\r
+/**\r
+ * fdt_appendprop_cell - append a single cell value to a property\r
+ *\r
+ * This is an alternative name for fdt_appendprop_u32()\r
+ */\r
+static inline int fdt_appendprop_cell(void *fdt, int nodeoffset,\r
+ const char *name, uint32_t val)\r
+{\r
+ return fdt_appendprop_u32(fdt, nodeoffset, name, val);\r
+}\r
+\r
+/**\r
+ * fdt_appendprop_string - append a string to a property\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to change\r
+ * @name: name of the property to change\r
+ * @str: string value to append to the property\r
+ *\r
+ * fdt_appendprop_string() appends the given string to the value of\r
+ * the named property in the given node, or creates a new property\r
+ * with that value if it does not already exist.\r
+ *\r
+ * This function may insert data into the blob, and will therefore\r
+ * change the offsets of some existing nodes.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to\r
+ * contain the new property value\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+#define fdt_appendprop_string(fdt, nodeoffset, name, str) \\r
+ fdt_appendprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)\r
+\r
+/**\r
+ * fdt_delprop - delete a property\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node whose property to nop\r
+ * @name: name of the property to nop\r
+ *\r
+ * fdt_del_property() will delete the given property.\r
+ *\r
+ * This function will delete data from the blob, and will therefore\r
+ * change the offsets of some existing nodes.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_NOTFOUND, node does not have the named property\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+int fdt_delprop(void *fdt, int nodeoffset, const char *name);\r
+\r
+/**\r
+ * fdt_add_subnode_namelen - creates a new node based on substring\r
+ * @fdt: pointer to the device tree blob\r
+ * @parentoffset: structure block offset of a node\r
+ * @name: name of the subnode to locate\r
+ * @namelen: number of characters of name to consider\r
+ *\r
+ * Identical to fdt_add_subnode(), but use only the first namelen\r
+ * characters of name as the name of the new node. This is useful for\r
+ * creating subnodes based on a portion of a larger string, such as a\r
+ * full path.\r
+ */\r
+int fdt_add_subnode_namelen(void *fdt, int parentoffset,\r
+ const char *name, int namelen);\r
+\r
+/**\r
+ * fdt_add_subnode - creates a new node\r
+ * @fdt: pointer to the device tree blob\r
+ * @parentoffset: structure block offset of a node\r
+ * @name: name of the subnode to locate\r
+ *\r
+ * fdt_add_subnode() creates a new node as a subnode of the node at\r
+ * structure block offset parentoffset, with the given name (which\r
+ * should include the unit address, if any).\r
+ *\r
+ * This function will insert data into the blob, and will therefore\r
+ * change the offsets of some existing nodes.\r
+\r
+ * returns:\r
+ * structure block offset of the created nodeequested subnode (>=0), on success\r
+ * -FDT_ERR_NOTFOUND, if the requested subnode does not exist\r
+ * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_EXISTS, if the node at parentoffset already has a subnode of\r
+ * the given name\r
+ * -FDT_ERR_NOSPACE, if there is insufficient free space in the\r
+ * blob to contain the new node\r
+ * -FDT_ERR_NOSPACE\r
+ * -FDT_ERR_BADLAYOUT\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings.\r
+ */\r
+int fdt_add_subnode(void *fdt, int parentoffset, const char *name);\r
+\r
+/**\r
+ * fdt_del_node - delete a node (subtree)\r
+ * @fdt: pointer to the device tree blob\r
+ * @nodeoffset: offset of the node to nop\r
+ *\r
+ * fdt_del_node() will remove the given node, including all its\r
+ * subnodes if any, from the blob.\r
+ *\r
+ * This function will delete data from the blob, and will therefore\r
+ * change the offsets of some existing nodes.\r
+ *\r
+ * returns:\r
+ * 0, on success\r
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag\r
+ * -FDT_ERR_BADLAYOUT,\r
+ * -FDT_ERR_BADMAGIC,\r
+ * -FDT_ERR_BADVERSION,\r
+ * -FDT_ERR_BADSTATE,\r
+ * -FDT_ERR_BADSTRUCTURE,\r
+ * -FDT_ERR_TRUNCATED, standard meanings\r
+ */\r
+int fdt_del_node(void *fdt, int nodeoffset);\r
+\r
+/**********************************************************************/\r
+/* Debugging / informational functions */\r
+/**********************************************************************/\r
+\r
+const char *fdt_strerror(int errval);\r
+\r
+#endif /* _LIBFDT_H */\r
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