1516 lines
55 KiB
C
1516 lines
55 KiB
C
#ifndef _LIBFDT_H
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#define _LIBFDT_H
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/*
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* libfdt - Flat Device Tree manipulation
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* Copyright (C) 2006 David Gibson, IBM Corporation.
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*
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* libfdt is dual licensed: you can use it either under the terms of
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* the GPL, or the BSD license, at your option.
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*
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* a) This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*
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* Alternatively,
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*
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* b) Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <libfdt_env.h>
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#include <fdt.h>
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#define FDT_FIRST_SUPPORTED_VERSION 0x10
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#define FDT_LAST_SUPPORTED_VERSION 0x11
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/* Error codes: informative error codes */
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#define FDT_ERR_NOTFOUND 1
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/* FDT_ERR_NOTFOUND: The requested node or property does not exist */
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#define FDT_ERR_EXISTS 2
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/* FDT_ERR_EXISTS: Attemped to create a node or property which
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* already exists */
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#define FDT_ERR_NOSPACE 3
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/* FDT_ERR_NOSPACE: Operation needed to expand the device
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* tree, but its buffer did not have sufficient space to
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* contain the expanded tree. Use fdt_open_into() to move the
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* device tree to a buffer with more space. */
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/* Error codes: codes for bad parameters */
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#define FDT_ERR_BADOFFSET 4
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/* FDT_ERR_BADOFFSET: Function was passed a structure block
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* offset which is out-of-bounds, or which points to an
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* unsuitable part of the structure for the operation. */
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#define FDT_ERR_BADPATH 5
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/* FDT_ERR_BADPATH: Function was passed a badly formatted path
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* (e.g. missing a leading / for a function which requires an
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* absolute path) */
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#define FDT_ERR_BADPHANDLE 6
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/* FDT_ERR_BADPHANDLE: Function was passed an invalid phandle
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* value. phandle values of 0 and -1 are not permitted. */
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#define FDT_ERR_BADSTATE 7
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/* FDT_ERR_BADSTATE: Function was passed an incomplete device
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* tree created by the sequential-write functions, which is
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* not sufficiently complete for the requested operation. */
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/* Error codes: codes for bad device tree blobs */
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#define FDT_ERR_TRUNCATED 8
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/* FDT_ERR_TRUNCATED: Structure block of the given device tree
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* ends without an FDT_END tag. */
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#define FDT_ERR_BADMAGIC 9
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/* FDT_ERR_BADMAGIC: Given "device tree" appears not to be a
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* device tree at all - it is missing the flattened device
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* tree magic number. */
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#define FDT_ERR_BADVERSION 10
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/* FDT_ERR_BADVERSION: Given device tree has a version which
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* can't be handled by the requested operation. For
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* read-write functions, this may mean that fdt_open_into() is
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* required to convert the tree to the expected version. */
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#define FDT_ERR_BADSTRUCTURE 11
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/* FDT_ERR_BADSTRUCTURE: Given device tree has a corrupt
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* structure block or other serious error (e.g. misnested
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* nodes, or subnodes preceding properties). */
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#define FDT_ERR_BADLAYOUT 12
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/* FDT_ERR_BADLAYOUT: For read-write functions, the given
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* device tree has it's sub-blocks in an order that the
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* function can't handle (memory reserve map, then structure,
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* then strings). Use fdt_open_into() to reorganize the tree
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* into a form suitable for the read-write operations. */
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/* "Can't happen" error indicating a bug in libfdt */
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#define FDT_ERR_INTERNAL 13
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/* FDT_ERR_INTERNAL: libfdt has failed an internal assertion.
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* Should never be returned, if it is, it indicates a bug in
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* libfdt itself. */
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#define FDT_ERR_MAX 13
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/**********************************************************************/
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/* Low-level functions (you probably don't need these) */
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/**********************************************************************/
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const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen);
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static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen)
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{
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return (void *)(uintptr_t)fdt_offset_ptr(fdt, offset, checklen);
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}
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uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset);
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/**********************************************************************/
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/* Traversal functions */
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/**********************************************************************/
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int fdt_next_node(const void *fdt, int offset, int *depth);
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/**
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* fdt_first_subnode() - get offset of first direct subnode
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*
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* @fdt: FDT blob
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* @offset: Offset of node to check
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* @return offset of first subnode, or -FDT_ERR_NOTFOUND if there is none
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*/
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int fdt_first_subnode(const void *fdt, int offset);
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/**
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* fdt_next_subnode() - get offset of next direct subnode
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*
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* After first calling fdt_first_subnode(), call this function repeatedly to
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* get direct subnodes of a parent node.
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*
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* @fdt: FDT blob
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* @offset: Offset of previous subnode
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* @return offset of next subnode, or -FDT_ERR_NOTFOUND if there are no more
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* subnodes
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*/
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int fdt_next_subnode(const void *fdt, int offset);
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/**********************************************************************/
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/* General functions */
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/**********************************************************************/
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#define fdt_get_header(fdt, field) \
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(fdt32_to_cpu(((const struct fdt_header *)(fdt))->field))
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#define fdt_magic(fdt) (fdt_get_header(fdt, magic))
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#define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize))
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#define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct))
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#define fdt_off_dt_strings(fdt) (fdt_get_header(fdt, off_dt_strings))
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#define fdt_off_mem_rsvmap(fdt) (fdt_get_header(fdt, off_mem_rsvmap))
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#define fdt_version(fdt) (fdt_get_header(fdt, version))
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#define fdt_last_comp_version(fdt) (fdt_get_header(fdt, last_comp_version))
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#define fdt_boot_cpuid_phys(fdt) (fdt_get_header(fdt, boot_cpuid_phys))
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#define fdt_size_dt_strings(fdt) (fdt_get_header(fdt, size_dt_strings))
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#define fdt_size_dt_struct(fdt) (fdt_get_header(fdt, size_dt_struct))
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#define __fdt_set_hdr(name) \
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static inline void fdt_set_##name(void *fdt, uint32_t val) \
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{ \
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struct fdt_header *fdth = (struct fdt_header*)fdt; \
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fdth->name = cpu_to_fdt32(val); \
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}
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__fdt_set_hdr(magic);
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__fdt_set_hdr(totalsize);
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__fdt_set_hdr(off_dt_struct);
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__fdt_set_hdr(off_dt_strings);
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__fdt_set_hdr(off_mem_rsvmap);
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__fdt_set_hdr(version);
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__fdt_set_hdr(last_comp_version);
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__fdt_set_hdr(boot_cpuid_phys);
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__fdt_set_hdr(size_dt_strings);
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__fdt_set_hdr(size_dt_struct);
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#undef __fdt_set_hdr
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/**
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* fdt_check_header - sanity check a device tree or possible device tree
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* @fdt: pointer to data which might be a flattened device tree
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*
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* fdt_check_header() checks that the given buffer contains what
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* appears to be a flattened device tree with sane information in its
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* header.
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*
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* returns:
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* 0, if the buffer appears to contain a valid device tree
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* -FDT_ERR_BADMAGIC,
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* -FDT_ERR_BADVERSION,
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* -FDT_ERR_BADSTATE, standard meanings, as above
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*/
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int fdt_check_header(const void *fdt);
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/**
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* fdt_move - move a device tree around in memory
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* @fdt: pointer to the device tree to move
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* @buf: pointer to memory where the device is to be moved
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* @bufsize: size of the memory space at buf
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*
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* fdt_move() relocates, if possible, the device tree blob located at
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* fdt to the buffer at buf of size bufsize. The buffer may overlap
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* with the existing device tree blob at fdt. Therefore,
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* fdt_move(fdt, fdt, fdt_totalsize(fdt))
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* should always succeed.
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*
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* returns:
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* 0, on success
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* -FDT_ERR_NOSPACE, bufsize is insufficient to contain the device tree
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* -FDT_ERR_BADMAGIC,
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* -FDT_ERR_BADVERSION,
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* -FDT_ERR_BADSTATE, standard meanings
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*/
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int fdt_move(const void *fdt, void *buf, int bufsize);
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/**********************************************************************/
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/* Read-only functions */
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/**********************************************************************/
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/**
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* fdt_string - retrieve a string from the strings block of a device tree
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* @fdt: pointer to the device tree blob
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* @stroffset: offset of the string within the strings block (native endian)
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*
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* fdt_string() retrieves a pointer to a single string from the
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* strings block of the device tree blob at fdt.
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*
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* returns:
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* a pointer to the string, on success
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* NULL, if stroffset is out of bounds
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*/
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const char *fdt_string(const void *fdt, int stroffset);
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/**
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* fdt_num_mem_rsv - retrieve the number of memory reserve map entries
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* @fdt: pointer to the device tree blob
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*
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* Returns the number of entries in the device tree blob's memory
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* reservation map. This does not include the terminating 0,0 entry
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* or any other (0,0) entries reserved for expansion.
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*
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* returns:
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* the number of entries
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*/
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int fdt_num_mem_rsv(const void *fdt);
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/**
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* fdt_get_mem_rsv - retrieve one memory reserve map entry
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* @fdt: pointer to the device tree blob
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* @address, @size: pointers to 64-bit variables
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*
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* On success, *address and *size will contain the address and size of
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* the n-th reserve map entry from the device tree blob, in
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* native-endian format.
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*
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* returns:
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* 0, on success
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* -FDT_ERR_BADMAGIC,
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* -FDT_ERR_BADVERSION,
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* -FDT_ERR_BADSTATE, standard meanings
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*/
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int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size);
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/**
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* fdt_subnode_offset_namelen - find a subnode based on substring
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* @fdt: pointer to the device tree blob
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* @parentoffset: structure block offset of a node
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* @name: name of the subnode to locate
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* @namelen: number of characters of name to consider
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*
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* Identical to fdt_subnode_offset(), but only examine the first
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* namelen characters of name for matching the subnode name. This is
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* useful for finding subnodes based on a portion of a larger string,
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* such as a full path.
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*/
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int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,
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const char *name, int namelen);
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/**
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* fdt_subnode_offset - find a subnode of a given node
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* @fdt: pointer to the device tree blob
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* @parentoffset: structure block offset of a node
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* @name: name of the subnode to locate
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*
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* fdt_subnode_offset() finds a subnode of the node at structure block
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* offset parentoffset with the given name. name may include a unit
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* address, in which case fdt_subnode_offset() will find the subnode
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* with that unit address, or the unit address may be omitted, in
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* which case fdt_subnode_offset() will find an arbitrary subnode
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* whose name excluding unit address matches the given name.
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*
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* returns:
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* structure block offset of the requested subnode (>=0), on success
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* -FDT_ERR_NOTFOUND, if the requested subnode does not exist
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* -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag
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* -FDT_ERR_BADMAGIC,
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* -FDT_ERR_BADVERSION,
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* -FDT_ERR_BADSTATE,
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* -FDT_ERR_BADSTRUCTURE,
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* -FDT_ERR_TRUNCATED, standard meanings.
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*/
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int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name);
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/**
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* fdt_path_offset - find a tree node by its full path
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* @fdt: pointer to the device tree blob
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* @path: full path of the node to locate
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*
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* fdt_path_offset() finds a node of a given path in the device tree.
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* Each path component may omit the unit address portion, but the
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* results of this are undefined if any such path component is
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* ambiguous (that is if there are multiple nodes at the relevant
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* level matching the given component, differentiated only by unit
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* address).
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*
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* returns:
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* structure block offset of the node with the requested path (>=0), on success
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* -FDT_ERR_BADPATH, given path does not begin with '/' or is invalid
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* -FDT_ERR_NOTFOUND, if the requested node does not exist
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* -FDT_ERR_BADMAGIC,
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* -FDT_ERR_BADVERSION,
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* -FDT_ERR_BADSTATE,
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* -FDT_ERR_BADSTRUCTURE,
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* -FDT_ERR_TRUNCATED, standard meanings.
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*/
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int fdt_path_offset(const void *fdt, const char *path);
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/**
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* fdt_get_name - retrieve the name of a given node
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* @fdt: pointer to the device tree blob
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* @nodeoffset: structure block offset of the starting node
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* @lenp: pointer to an integer variable (will be overwritten) or NULL
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*
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* fdt_get_name() retrieves the name (including unit address) of the
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* device tree node at structure block offset nodeoffset. If lenp is
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* non-NULL, the length of this name is also returned, in the integer
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* pointed to by lenp.
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*
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* returns:
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* pointer to the node's name, on success
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* If lenp is non-NULL, *lenp contains the length of that name (>=0)
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* NULL, on error
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* if lenp is non-NULL *lenp contains an error code (<0):
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* -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
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* -FDT_ERR_BADMAGIC,
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* -FDT_ERR_BADVERSION,
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* -FDT_ERR_BADSTATE, standard meanings
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*/
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const char *fdt_get_name(const void *fdt, int nodeoffset, int *lenp);
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/**
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* fdt_first_property_offset - find the offset of a node's first property
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* @fdt: pointer to the device tree blob
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* @nodeoffset: structure block offset of a node
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*
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* fdt_first_property_offset() finds the first property of the node at
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* the given structure block offset.
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*
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* returns:
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* structure block offset of the property (>=0), on success
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* -FDT_ERR_NOTFOUND, if the requested node has no properties
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* -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_BEGIN_NODE tag
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* -FDT_ERR_BADMAGIC,
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* -FDT_ERR_BADVERSION,
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* -FDT_ERR_BADSTATE,
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* -FDT_ERR_BADSTRUCTURE,
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* -FDT_ERR_TRUNCATED, standard meanings.
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*/
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int fdt_first_property_offset(const void *fdt, int nodeoffset);
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/**
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* fdt_next_property_offset - step through a node's properties
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* @fdt: pointer to the device tree blob
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* @offset: structure block offset of a property
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*
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* fdt_next_property_offset() finds the property immediately after the
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* one at the given structure block offset. This will be a property
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* of the same node as the given property.
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*
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* returns:
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* structure block offset of the next property (>=0), on success
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* -FDT_ERR_NOTFOUND, if the given property is the last in its node
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* -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_PROP tag
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* -FDT_ERR_BADMAGIC,
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* -FDT_ERR_BADVERSION,
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* -FDT_ERR_BADSTATE,
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* -FDT_ERR_BADSTRUCTURE,
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* -FDT_ERR_TRUNCATED, standard meanings.
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*/
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int fdt_next_property_offset(const void *fdt, int offset);
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/**
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* fdt_get_property_by_offset - retrieve the property at a given offset
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* @fdt: pointer to the device tree blob
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* @offset: offset of the property to retrieve
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* @lenp: pointer to an integer variable (will be overwritten) or NULL
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*
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* fdt_get_property_by_offset() retrieves a pointer to the
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* fdt_property structure within the device tree blob at the given
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* offset. If lenp is non-NULL, the length of the property value is
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* also returned, in the integer pointed to by lenp.
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*
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* returns:
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* pointer to the structure representing the property
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* if lenp is non-NULL, *lenp contains the length of the property
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* value (>=0)
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* NULL, on error
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* if lenp is non-NULL, *lenp contains an error code (<0):
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* -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag
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* -FDT_ERR_BADMAGIC,
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* -FDT_ERR_BADVERSION,
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* -FDT_ERR_BADSTATE,
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* -FDT_ERR_BADSTRUCTURE,
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* -FDT_ERR_TRUNCATED, standard meanings
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*/
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const struct fdt_property *fdt_get_property_by_offset(const void *fdt,
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int offset,
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int *lenp);
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/**
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* fdt_get_property_namelen - find a property based on substring
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* @fdt: pointer to the device tree blob
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* @nodeoffset: offset of the node whose property to find
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* @name: name of the property to find
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* @namelen: number of characters of name to consider
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* @lenp: pointer to an integer variable (will be overwritten) or NULL
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*
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* 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', if 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);
|
|
|
|
/**
|
|
* fdt_stringlist_contains - check a string list property for a string
|
|
* @strlist: Property containing a list of strings to check
|
|
* @listlen: Length of property
|
|
* @str: String to search for
|
|
*
|
|
* This is a utility function provided for convenience. The list contains
|
|
* one or more strings, each terminated by \0, as is found in a device tree
|
|
* "compatible" property.
|
|
*
|
|
* @return: 1 if the string is found in the list, 0 not found, or invalid list
|
|
*/
|
|
int fdt_stringlist_contains(const char *strlist, int listlen, const char *str);
|
|
|
|
/**********************************************************************/
|
|
/* 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)
|
|
{
|
|
fdt32_t tmp = cpu_to_fdt32(val);
|
|
return fdt_setprop_inplace(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
fdt64_t tmp = cpu_to_fdt64(val);
|
|
return fdt_setprop_inplace(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
}
|
|
|
|
/**
|
|
* 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_resize(void *fdt, 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)
|
|
{
|
|
fdt32_t tmp = cpu_to_fdt32(val);
|
|
return fdt_property(fdt, name, &tmp, sizeof(tmp));
|
|
}
|
|
static inline int fdt_property_u64(void *fdt, const char *name, uint64_t val)
|
|
{
|
|
fdt64_t tmp = cpu_to_fdt64(val);
|
|
return fdt_property(fdt, name, &tmp, sizeof(tmp));
|
|
}
|
|
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)
|
|
{
|
|
fdt32_t tmp = cpu_to_fdt32(val);
|
|
return fdt_setprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
fdt64_t tmp = cpu_to_fdt64(val);
|
|
return fdt_setprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
fdt32_t tmp = cpu_to_fdt32(val);
|
|
return fdt_appendprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
fdt64_t tmp = cpu_to_fdt64(val);
|
|
return fdt_appendprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
}
|
|
|
|
/**
|
|
* 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 */
|