mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-17 08:43:07 +00:00
185f812c41
Sphinx expects Return: and not @return to indicate a return value.
find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2048 lines
72 KiB
C
2048 lines
72 KiB
C
/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
|
|
#ifndef LIBFDT_H
|
|
#define LIBFDT_H
|
|
/*
|
|
* libfdt - Flat Device Tree manipulation
|
|
* Copyright (C) 2006 David Gibson, IBM Corporation.
|
|
*/
|
|
|
|
#include "libfdt_env.h"
|
|
#include "fdt.h"
|
|
|
|
#define FDT_FIRST_SUPPORTED_VERSION 0x02
|
|
#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: Attempted 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.
|
|
* This can be caused either by an invalid phandle property
|
|
* length, or the phandle value was either 0 or -1, which 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: FDT or a sub-block is improperly
|
|
* terminated (overflows, goes outside allowed bounds, or
|
|
* isn't properly terminated). */
|
|
#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. */
|
|
|
|
/* Errors in device tree content */
|
|
#define FDT_ERR_BADNCELLS 14
|
|
/* FDT_ERR_BADNCELLS: Device tree has a #address-cells, #size-cells
|
|
* or similar property with a bad format or value */
|
|
|
|
#define FDT_ERR_BADVALUE 15
|
|
/* FDT_ERR_BADVALUE: Device tree has a property with an unexpected
|
|
* value. For example: a property expected to contain a string list
|
|
* is not NUL-terminated within the length of its value. */
|
|
|
|
#define FDT_ERR_BADOVERLAY 16
|
|
/* FDT_ERR_BADOVERLAY: The device tree overlay, while
|
|
* correctly structured, cannot be applied due to some
|
|
* unexpected or missing value, property or node. */
|
|
|
|
#define FDT_ERR_NOPHANDLES 17
|
|
/* FDT_ERR_NOPHANDLES: The device tree doesn't have any
|
|
* phandle available anymore without causing an overflow */
|
|
|
|
#define FDT_ERR_BADFLAGS 18
|
|
/* FDT_ERR_BADFLAGS: The function was passed a flags field that
|
|
* contains invalid flags or an invalid combination of flags. */
|
|
|
|
#define FDT_ERR_MAX 18
|
|
|
|
/* constants */
|
|
#define FDT_MAX_PHANDLE 0xfffffffe
|
|
/* Valid values for phandles range from 1 to 2^32-2. */
|
|
|
|
/**********************************************************************/
|
|
/* Low-level functions (you probably don't need these) */
|
|
/**********************************************************************/
|
|
|
|
#ifndef SWIG /* This function is not useful in Python */
|
|
const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen);
|
|
#endif
|
|
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);
|
|
|
|
static inline void fdt32_st(void *property, uint32_t value)
|
|
{
|
|
uint8_t *bp = (uint8_t *)property;
|
|
|
|
bp[0] = value >> 24;
|
|
bp[1] = (value >> 16) & 0xff;
|
|
bp[2] = (value >> 8) & 0xff;
|
|
bp[3] = value & 0xff;
|
|
}
|
|
|
|
static inline void fdt64_st(void *property, uint64_t value)
|
|
{
|
|
uint8_t *bp = (uint8_t *)property;
|
|
|
|
bp[0] = value >> 56;
|
|
bp[1] = (value >> 48) & 0xff;
|
|
bp[2] = (value >> 40) & 0xff;
|
|
bp[3] = (value >> 32) & 0xff;
|
|
bp[4] = (value >> 24) & 0xff;
|
|
bp[5] = (value >> 16) & 0xff;
|
|
bp[6] = (value >> 8) & 0xff;
|
|
bp[7] = value & 0xff;
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* Traversal functions */
|
|
/**********************************************************************/
|
|
|
|
int fdt_next_node(const void *fdt, int offset, int *depth);
|
|
|
|
/**
|
|
* fdt_first_subnode() - get offset of first direct subnode
|
|
*
|
|
* @fdt: FDT blob
|
|
* @offset: Offset of node to check
|
|
* Return: offset of first subnode, or -FDT_ERR_NOTFOUND if there is none
|
|
*/
|
|
int fdt_first_subnode(const void *fdt, int offset);
|
|
|
|
/**
|
|
* fdt_next_subnode() - get offset of next direct subnode
|
|
*
|
|
* After first calling fdt_first_subnode(), call this function repeatedly to
|
|
* get direct subnodes of a parent node.
|
|
*
|
|
* @fdt: FDT blob
|
|
* @offset: Offset of previous subnode
|
|
* Return: offset of next subnode, or -FDT_ERR_NOTFOUND if there are no more
|
|
* subnodes
|
|
*/
|
|
int fdt_next_subnode(const void *fdt, int offset);
|
|
|
|
/**
|
|
* fdt_for_each_subnode - iterate over all subnodes of a parent
|
|
*
|
|
* @node: child node (int, lvalue)
|
|
* @fdt: FDT blob (const void *)
|
|
* @parent: parent node (int)
|
|
*
|
|
* This is actually a wrapper around a for loop and would be used like so:
|
|
*
|
|
* fdt_for_each_subnode(node, fdt, parent) {
|
|
* Use node
|
|
* ...
|
|
* }
|
|
*
|
|
* if ((node < 0) && (node != -FDT_ERR_NOTFOUND)) {
|
|
* Error handling
|
|
* }
|
|
*
|
|
* Note that this is implemented as a macro and @node is used as
|
|
* iterator in the loop. The parent variable be constant or even a
|
|
* literal.
|
|
*
|
|
*/
|
|
#define fdt_for_each_subnode(node, fdt, parent) \
|
|
for (node = fdt_first_subnode(fdt, parent); \
|
|
node >= 0; \
|
|
node = fdt_next_subnode(fdt, node))
|
|
|
|
/**********************************************************************/
|
|
/* 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_header_size - return the size of the tree's header
|
|
* @fdt: pointer to a flattened device tree
|
|
*/
|
|
size_t fdt_header_size(const void *fdt);
|
|
|
|
/**
|
|
* fdt_header_size_ - internal function which takes a version number
|
|
*/
|
|
size_t fdt_header_size_(uint32_t version);
|
|
|
|
/**
|
|
* fdt_check_header - sanity check a device tree header
|
|
|
|
* @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, and that the header contains
|
|
* valid information (to the extent that can be determined from the
|
|
* header alone).
|
|
*
|
|
* returns:
|
|
* 0, if the buffer appears to contain a valid device tree
|
|
* -FDT_ERR_BADMAGIC,
|
|
* -FDT_ERR_BADVERSION,
|
|
* -FDT_ERR_BADSTATE,
|
|
* -FDT_ERR_TRUNCATED, 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 */
|
|
/**********************************************************************/
|
|
|
|
int fdt_check_full(const void *fdt, size_t bufsize);
|
|
|
|
/**
|
|
* fdt_get_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)
|
|
* @lenp: optional pointer to return the string's length
|
|
*
|
|
* fdt_get_string() retrieves a pointer to a single string from the
|
|
* strings block of the device tree blob at fdt, and optionally also
|
|
* returns the string's length in *lenp.
|
|
*
|
|
* returns:
|
|
* a pointer to the string, on success
|
|
* NULL, if stroffset is out of bounds, or doesn't point to a valid string
|
|
*/
|
|
const char *fdt_get_string(const void *fdt, int stroffset, int *lenp);
|
|
|
|
/**
|
|
* 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, or doesn't point to a valid string
|
|
*/
|
|
const char *fdt_string(const void *fdt, int stroffset);
|
|
|
|
/**
|
|
* fdt_find_max_phandle - find and return the highest phandle in a tree
|
|
* @fdt: pointer to the device tree blob
|
|
* @phandle: return location for the highest phandle value found in the tree
|
|
*
|
|
* fdt_find_max_phandle() finds the highest phandle value in the given device
|
|
* tree. The value returned in @phandle is only valid if the function returns
|
|
* success.
|
|
*
|
|
* returns:
|
|
* 0 on success or a negative error code on failure
|
|
*/
|
|
int fdt_find_max_phandle(const void *fdt, uint32_t *phandle);
|
|
|
|
/**
|
|
* fdt_get_max_phandle - retrieves the highest phandle in a tree
|
|
* @fdt: pointer to the device tree blob
|
|
*
|
|
* fdt_get_max_phandle retrieves the highest phandle in the given
|
|
* device tree. This will ignore badly formatted phandles, or phandles
|
|
* with a value of 0 or -1.
|
|
*
|
|
* This function is deprecated in favour of fdt_find_max_phandle().
|
|
*
|
|
* returns:
|
|
* the highest phandle on success
|
|
* 0, if no phandle was found in the device tree
|
|
* -1, if an error occurred
|
|
*/
|
|
static inline uint32_t fdt_get_max_phandle(const void *fdt)
|
|
{
|
|
uint32_t phandle;
|
|
int err;
|
|
|
|
err = fdt_find_max_phandle(fdt, &phandle);
|
|
if (err < 0)
|
|
return (uint32_t)-1;
|
|
|
|
return phandle;
|
|
}
|
|
|
|
/**
|
|
* fdt_generate_phandle - return a new, unused phandle for a device tree blob
|
|
* @fdt: pointer to the device tree blob
|
|
* @phandle: return location for the new phandle
|
|
*
|
|
* Walks the device tree blob and looks for the highest phandle value. On
|
|
* success, the new, unused phandle value (one higher than the previously
|
|
* highest phandle value in the device tree blob) will be returned in the
|
|
* @phandle parameter.
|
|
*
|
|
* Returns:
|
|
* 0 on success or a negative error-code on failure
|
|
*/
|
|
int fdt_generate_phandle(const void *fdt, uint32_t *phandle);
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
#ifndef SWIG /* Not available in Python */
|
|
int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,
|
|
const char *name, int namelen);
|
|
#endif
|
|
/**
|
|
* 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_namelen - find a tree node by its full path
|
|
* @fdt: pointer to the device tree blob
|
|
* @path: full path of the node to locate
|
|
* @namelen: number of characters of path to consider
|
|
*
|
|
* Identical to fdt_path_offset(), but only consider the first namelen
|
|
* characters of path as the path name.
|
|
*/
|
|
#ifndef SWIG /* Not available in Python */
|
|
int fdt_path_offset_namelen(const void *fdt, const char *path, int namelen);
|
|
#endif
|
|
|
|
/**
|
|
* 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_for_each_property_offset - iterate over all properties of a node
|
|
*
|
|
* @property_offset: property offset (int, lvalue)
|
|
* @fdt: FDT blob (const void *)
|
|
* @node: node offset (int)
|
|
*
|
|
* This is actually a wrapper around a for loop and would be used like so:
|
|
*
|
|
* fdt_for_each_property_offset(property, fdt, node) {
|
|
* Use property
|
|
* ...
|
|
* }
|
|
*
|
|
* if ((property < 0) && (property != -FDT_ERR_NOTFOUND)) {
|
|
* Error handling
|
|
* }
|
|
*
|
|
* Note that this is implemented as a macro and property is used as
|
|
* iterator in the loop. The node variable can be constant or even a
|
|
* literal.
|
|
*/
|
|
#define fdt_for_each_property_offset(property, fdt, node) \
|
|
for (property = fdt_first_property_offset(fdt, node); \
|
|
property >= 0; \
|
|
property = fdt_next_property_offset(fdt, property))
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* Note that this code only works on device tree versions >= 16. fdt_getprop()
|
|
* works on all versions.
|
|
*
|
|
* 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(), but only examine the first namelen
|
|
* characters of name for matching the property name.
|
|
*/
|
|
#ifndef SWIG /* Not available in Python */
|
|
const struct fdt_property *fdt_get_property_namelen(const void *fdt,
|
|
int nodeoffset,
|
|
const char *name,
|
|
int namelen, int *lenp);
|
|
#endif
|
|
|
|
/**
|
|
* 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
|
|
* @offset: 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
|
|
*/
|
|
#ifndef SWIG /* This function is not useful in Python */
|
|
const void *fdt_getprop_by_offset(const void *fdt, int offset,
|
|
const char **namep, int *lenp);
|
|
#endif
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
#ifndef SWIG /* Not available in Python */
|
|
const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,
|
|
const char *name, int namelen, int *lenp);
|
|
static inline void *fdt_getprop_namelen_w(void *fdt, int nodeoffset,
|
|
const char *name, int namelen,
|
|
int *lenp)
|
|
{
|
|
return (void *)(uintptr_t)fdt_getprop_namelen(fdt, nodeoffset, name,
|
|
namelen, lenp);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
#ifndef SWIG /* Not available in Python */
|
|
const char *fdt_get_alias_namelen(const void *fdt,
|
|
const char *name, int namelen);
|
|
#endif
|
|
|
|
/**
|
|
* fdt_get_alias - retrieve 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);
|
|
|
|
/**
|
|
* fdt_stringlist_count - count the number of strings in a string list
|
|
* @fdt: pointer to the device tree blob
|
|
* @nodeoffset: offset of a tree node
|
|
* @property: name of the property containing the string list
|
|
* @return:
|
|
* the number of strings in the given property
|
|
* -FDT_ERR_BADVALUE if the property value is not NUL-terminated
|
|
* -FDT_ERR_NOTFOUND if the property does not exist
|
|
*/
|
|
int fdt_stringlist_count(const void *fdt, int nodeoffset, const char *property);
|
|
|
|
/**
|
|
* fdt_stringlist_search - find a string in a string list and return its index
|
|
* @fdt: pointer to the device tree blob
|
|
* @nodeoffset: offset of a tree node
|
|
* @property: name of the property containing the string list
|
|
* @string: string to look up in the string list
|
|
*
|
|
* Note that it is possible for this function to succeed on property values
|
|
* that are not NUL-terminated. That's because the function will stop after
|
|
* finding the first occurrence of @string. This can for example happen with
|
|
* small-valued cell properties, such as #address-cells, when searching for
|
|
* the empty string.
|
|
*
|
|
* @return:
|
|
* the index of the string in the list of strings
|
|
* -FDT_ERR_BADVALUE if the property value is not NUL-terminated
|
|
* -FDT_ERR_NOTFOUND if the property does not exist or does not contain
|
|
* the given string
|
|
*/
|
|
int fdt_stringlist_search(const void *fdt, int nodeoffset, const char *property,
|
|
const char *string);
|
|
|
|
/**
|
|
* fdt_stringlist_get() - obtain the string at a given index in a string list
|
|
* @fdt: pointer to the device tree blob
|
|
* @nodeoffset: offset of a tree node
|
|
* @property: name of the property containing the string list
|
|
* @index: index of the string to return
|
|
* @lenp: return location for the string length or an error code on failure
|
|
*
|
|
* Note that this will successfully extract strings from properties with
|
|
* non-NUL-terminated values. For example on small-valued cell properties
|
|
* this function will return the empty string.
|
|
*
|
|
* If non-NULL, the length of the string (on success) or a negative error-code
|
|
* (on failure) will be stored in the integer pointer to by lenp.
|
|
*
|
|
* @return:
|
|
* A pointer to the string at the given index in the string list or NULL on
|
|
* failure. On success the length of the string will be stored in the memory
|
|
* location pointed to by the lenp parameter, if non-NULL. On failure one of
|
|
* the following negative error codes will be returned in the lenp parameter
|
|
* (if non-NULL):
|
|
* -FDT_ERR_BADVALUE if the property value is not NUL-terminated
|
|
* -FDT_ERR_NOTFOUND if the property does not exist
|
|
*/
|
|
const char *fdt_stringlist_get(const void *fdt, int nodeoffset,
|
|
const char *property, int index,
|
|
int *lenp);
|
|
|
|
/**********************************************************************/
|
|
/* Read-only functions (addressing related) */
|
|
/**********************************************************************/
|
|
|
|
/**
|
|
* FDT_MAX_NCELLS - maximum value for #address-cells and #size-cells
|
|
*
|
|
* This is the maximum value for #address-cells, #size-cells and
|
|
* similar properties that will be processed by libfdt. IEE1275
|
|
* requires that OF implementations handle values up to 4.
|
|
* Implementations may support larger values, but in practice higher
|
|
* values aren't used.
|
|
*/
|
|
#define FDT_MAX_NCELLS 4
|
|
|
|
/**
|
|
* fdt_address_cells - retrieve address size for a bus represented in the tree
|
|
* @fdt: pointer to the device tree blob
|
|
* @nodeoffset: offset of the node to find the address size for
|
|
*
|
|
* When the node has a valid #address-cells property, returns its value.
|
|
*
|
|
* returns:
|
|
* 0 <= n < FDT_MAX_NCELLS, on success
|
|
* 2, if the node has no #address-cells property
|
|
* -FDT_ERR_BADNCELLS, if the node has a badly formatted or invalid
|
|
* #address-cells property
|
|
* -FDT_ERR_BADMAGIC,
|
|
* -FDT_ERR_BADVERSION,
|
|
* -FDT_ERR_BADSTATE,
|
|
* -FDT_ERR_BADSTRUCTURE,
|
|
* -FDT_ERR_TRUNCATED, standard meanings
|
|
*/
|
|
int fdt_address_cells(const void *fdt, int nodeoffset);
|
|
|
|
/**
|
|
* fdt_size_cells - retrieve address range size for a bus represented in the
|
|
* tree
|
|
* @fdt: pointer to the device tree blob
|
|
* @nodeoffset: offset of the node to find the address range size for
|
|
*
|
|
* When the node has a valid #size-cells property, returns its value.
|
|
*
|
|
* returns:
|
|
* 0 <= n < FDT_MAX_NCELLS, on success
|
|
* 1, if the node has no #size-cells property
|
|
* -FDT_ERR_BADNCELLS, if the node has a badly formatted or invalid
|
|
* #size-cells property
|
|
* -FDT_ERR_BADMAGIC,
|
|
* -FDT_ERR_BADVERSION,
|
|
* -FDT_ERR_BADSTATE,
|
|
* -FDT_ERR_BADSTRUCTURE,
|
|
* -FDT_ERR_TRUNCATED, standard meanings
|
|
*/
|
|
int fdt_size_cells(const void *fdt, int nodeoffset);
|
|
|
|
|
|
/**********************************************************************/
|
|
/* Write-in-place functions */
|
|
/**********************************************************************/
|
|
|
|
/**
|
|
* fdt_setprop_inplace_namelen_partial - 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
|
|
* @namelen: number of characters of name to consider
|
|
* @idx: index of the property to change in the array
|
|
* @val: pointer to data to replace the property value with
|
|
* @len: length of the property value
|
|
*
|
|
* Identical to fdt_setprop_inplace(), but modifies the given property
|
|
* starting from the given index, and using only the first characters
|
|
* of the name. It is useful when you want to manipulate only one value of
|
|
* an array and you have a string that doesn't end with \0.
|
|
*/
|
|
#ifndef SWIG /* Not available in Python */
|
|
int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
|
|
const char *name, int namelen,
|
|
uint32_t idx, const void *val,
|
|
int len);
|
|
#endif
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
#ifndef SWIG /* Not available in Python */
|
|
int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
|
|
const void *val, int len);
|
|
#endif
|
|
|
|
/**
|
|
* 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 */
|
|
/**********************************************************************/
|
|
|
|
/* fdt_create_with_flags flags */
|
|
#define FDT_CREATE_FLAG_NO_NAME_DEDUP 0x1
|
|
/* FDT_CREATE_FLAG_NO_NAME_DEDUP: Do not try to de-duplicate property
|
|
* names in the fdt. This can result in faster creation times, but
|
|
* a larger fdt. */
|
|
|
|
#define FDT_CREATE_FLAGS_ALL (FDT_CREATE_FLAG_NO_NAME_DEDUP)
|
|
|
|
/**
|
|
* fdt_create_with_flags - begin creation of a new fdt
|
|
* @fdt: pointer to memory allocated where fdt will be created
|
|
* @bufsize: size of the memory space at fdt
|
|
* @flags: a valid combination of FDT_CREATE_FLAG_ flags, or 0.
|
|
*
|
|
* fdt_create_with_flags() begins the process of creating a new fdt with
|
|
* the sequential write interface.
|
|
*
|
|
* fdt creation process must end with fdt_finished() to produce a valid fdt.
|
|
*
|
|
* returns:
|
|
* 0, on success
|
|
* -FDT_ERR_NOSPACE, bufsize is insufficient for a minimal fdt
|
|
* -FDT_ERR_BADFLAGS, flags is not valid
|
|
*/
|
|
int fdt_create_with_flags(void *buf, int bufsize, uint32_t flags);
|
|
|
|
/**
|
|
* fdt_create - begin creation of a new fdt
|
|
* @fdt: pointer to memory allocated where fdt will be created
|
|
* @bufsize: size of the memory space at fdt
|
|
*
|
|
* fdt_create() is equivalent to fdt_create_with_flags() with flags=0.
|
|
*
|
|
* returns:
|
|
* 0, on success
|
|
* -FDT_ERR_NOSPACE, bufsize is insufficient for a minimal fdt
|
|
*/
|
|
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));
|
|
}
|
|
|
|
#ifndef SWIG /* Not available in Python */
|
|
static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val)
|
|
{
|
|
return fdt_property_u32(fdt, name, val);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* fdt_property_placeholder - add a new property and return a ptr to its value
|
|
*
|
|
* @fdt: pointer to the device tree blob
|
|
* @name: name of property to add
|
|
* @len: length of property value in bytes
|
|
* @valp: returns a pointer to where where the value should be placed
|
|
*
|
|
* returns:
|
|
* 0, on success
|
|
* -FDT_ERR_BADMAGIC,
|
|
* -FDT_ERR_NOSPACE, standard meanings
|
|
*/
|
|
int fdt_property_placeholder(void *fdt, const char *name, int len, void **valp);
|
|
|
|
#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_placeholder - allocate space for 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
|
|
* @len: length of the property value
|
|
* @prop_data: return pointer to property data
|
|
*
|
|
* fdt_setprop_placeholer() allocates the named property in the given node.
|
|
* If the property exists it is resized. In either case a pointer to the
|
|
* property data is returned.
|
|
*
|
|
* 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_placeholder(void *fdt, int nodeoffset, const char *name,
|
|
int len, void **prop_data);
|
|
|
|
/**
|
|
* 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_setprop_empty - set a property to an empty value
|
|
* @fdt: pointer to the device tree blob
|
|
* @nodeoffset: offset of the node whose property to change
|
|
* @name: name of the property to change
|
|
*
|
|
* fdt_setprop_empty() sets the value of the named property in the
|
|
* given node to an empty (zero length) value, or creates a new empty
|
|
* 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
|
|
*/
|
|
#define fdt_setprop_empty(fdt, nodeoffset, name) \
|
|
fdt_setprop((fdt), (nodeoffset), (name), NULL, 0)
|
|
|
|
/**
|
|
* 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_appendprop_addrrange - append a address range property
|
|
* @fdt: pointer to the device tree blob
|
|
* @parent: offset of the parent node
|
|
* @nodeoffset: offset of the node to add a property at
|
|
* @name: name of property
|
|
* @addr: start address of a given range
|
|
* @size: size of a given range
|
|
*
|
|
* fdt_appendprop_addrrange() appends an address range value (start
|
|
* address and size) 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.
|
|
* If "name" is not specified, a default "reg" is used.
|
|
* Cell sizes are determined by parent's #address-cells and #size-cells.
|
|
*
|
|
* This function may insert data into the blob, and will therefore
|
|
* change the offsets of some existing nodes.
|
|
*
|
|
* returns:
|
|
* 0, on success
|
|
* -FDT_ERR_BADLAYOUT,
|
|
* -FDT_ERR_BADMAGIC,
|
|
* -FDT_ERR_BADNCELLS, if the node has a badly formatted or invalid
|
|
* #address-cells property
|
|
* -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
* -FDT_ERR_BADSTATE,
|
|
* -FDT_ERR_BADSTRUCTURE,
|
|
* -FDT_ERR_BADVERSION,
|
|
* -FDT_ERR_BADVALUE, addr or size doesn't fit to respective cells size
|
|
* -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
|
|
* contain a new property
|
|
* -FDT_ERR_TRUNCATED, standard meanings
|
|
*/
|
|
int fdt_appendprop_addrrange(void *fdt, int parent, int nodeoffset,
|
|
const char *name, uint64_t addr, uint64_t size);
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
#ifndef SWIG /* Not available in Python */
|
|
int fdt_add_subnode_namelen(void *fdt, int parentoffset,
|
|
const char *name, int namelen);
|
|
#endif
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* fdt_overlay_apply - Applies a DT overlay on a base DT
|
|
* @fdt: pointer to the base device tree blob
|
|
* @fdto: pointer to the device tree overlay blob
|
|
*
|
|
* fdt_overlay_apply() will apply the given device tree overlay on the
|
|
* given base device tree.
|
|
*
|
|
* Expect the base device tree to be modified, even if the function
|
|
* returns an error.
|
|
*
|
|
* returns:
|
|
* 0, on success
|
|
* -FDT_ERR_NOSPACE, there's not enough space in the base device tree
|
|
* -FDT_ERR_NOTFOUND, the overlay points to some inexistant nodes or
|
|
* properties in the base DT
|
|
* -FDT_ERR_BADPHANDLE,
|
|
* -FDT_ERR_BADOVERLAY,
|
|
* -FDT_ERR_NOPHANDLES,
|
|
* -FDT_ERR_INTERNAL,
|
|
* -FDT_ERR_BADLAYOUT,
|
|
* -FDT_ERR_BADMAGIC,
|
|
* -FDT_ERR_BADOFFSET,
|
|
* -FDT_ERR_BADPATH,
|
|
* -FDT_ERR_BADVERSION,
|
|
* -FDT_ERR_BADSTRUCTURE,
|
|
* -FDT_ERR_BADSTATE,
|
|
* -FDT_ERR_TRUNCATED, standard meanings
|
|
*/
|
|
int fdt_overlay_apply(void *fdt, void *fdto);
|
|
|
|
/**
|
|
* fdt_overlay_apply_node - Merges a node into the base device tree
|
|
*
|
|
* See overlay_apply_node() for details.
|
|
*/
|
|
int fdt_overlay_apply_node(void *fdt, int target, void *fdto, int node);
|
|
|
|
/**********************************************************************/
|
|
/* Debugging / informational functions */
|
|
/**********************************************************************/
|
|
|
|
const char *fdt_strerror(int errval);
|
|
|
|
#endif /* LIBFDT_H */
|