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libfdt: Update to latest pylibfdt implementation

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The enhanced pylibfdt support in U-Boot needed for binman was a
placeholder while upstreaming of this work continued. This is now
complete, so bring in the changes and update the tools as needed.

There are quite a few changes since we decided to split the
implementation into three fdt classes instead of two.

The Fdt.del_node() method was unfortunately missed in this process and
will be dealt with later. It exists in U-Boot but not upstream.

Further syncing of libfdt probably needs to wait until we assess the
code-size impact of all the new checking code on SPL and possibly provide
a way to disable it.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2018-07-26 14:02:13 -06:00
parent 95e11069b5
commit 50c59522c2
3 changed files with 254 additions and 240 deletions
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490
scripts/dtc/pylibfdt/libfdt.i_shipped
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@ -18,7 +18,8 @@
* a struct called fdt_property. That struct causes swig to create a class in
* libfdt.py called fdt_property(), which confuses things.
*/
static int _fdt_property(void *fdt, const char *name, const char *val, int len)
static int fdt_property_stub(void *fdt, const char *name, const char *val,
int len)
{
return fdt_property(fdt, name, val, len);
}
@ -54,6 +55,7 @@ import struct
# Pass this as the 'quiet' parameter to return -ENOTFOUND on NOTFOUND errors,
# instead of raising an exception.
QUIET_NOTFOUND = (NOTFOUND,)
QUIET_NOSPACE = (NOSPACE,)
class FdtException(Exception):
@ -119,23 +121,18 @@ def check_err_null(val, quiet=()):
raise FdtException(val)
return val
class FdtRo(object):
"""Class for a read-only device-tree
class Fdt:
"""Device tree class, supporting all operations
This is a base class used by FdtRw (read-write access) and FdtSw
(sequential-write access). It implements read-only access to the
device tree.
The Fdt object is created is created from a device tree binary file,
e.g. with something like:
Here are the three classes and when you should use them:
fdt = Fdt(open("filename.dtb").read())
Operations can then be performed using the methods in this class. Each
method xxx(args...) corresponds to a libfdt function fdt_xxx(fdt, args...).
All methods raise an FdtException if an error occurs. To avoid this
behaviour a 'quiet' parameter is provided for some functions. This
defaults to empty, but you can pass a list of errors that you expect.
If one of these errors occurs, the function will return an error number
(e.g. -NOTFOUND).
FdtRo - read-only access to an existing FDT
FdtRw - read-write access to an existing FDT (most common case)
FdtSw - for creating a new FDT, as well as allowing read-only access
"""
def __init__(self, data):
self._fdt = bytearray(data)
@ -157,12 +154,14 @@ class Fdt:
Args:
nodeoffset: Node offset of previous node
depth: On input, the depth of the node at nodeoffset. On output, the
depth of the returned node
depth: The depth of the node at nodeoffset. This is used to
calculate the depth of the returned node
quiet: Errors to ignore (empty to raise on all errors)
Returns:
The offset of the next node, if any
Typle:
Offset of the next node, if any, else a -ve error
Depth of the returned node, if any, else undefined
Raises:
FdtException if no more nodes found or other error occurs
@ -205,7 +204,7 @@ class Fdt:
Returns:
Magic word
"""
return fdt_magic(self._fdt) & 0xffffffff
return fdt_magic(self._fdt)
def totalsize(self):
"""Return the total size of the device tree
@ -213,7 +212,7 @@ class Fdt:
Returns:
Total tree size in bytes
"""
return check_err(fdt_totalsize(self._fdt))
return fdt_totalsize(self._fdt)
def off_dt_struct(self):
"""Return the start of the device-tree struct area
@ -221,7 +220,7 @@ class Fdt:
Returns:
Start offset of struct area
"""
return check_err(fdt_off_dt_struct(self._fdt))
return fdt_off_dt_struct(self._fdt)
def off_dt_strings(self):
"""Return the start of the device-tree string area
@ -229,7 +228,7 @@ class Fdt:
Returns:
Start offset of string area
"""
return check_err(fdt_off_dt_strings(self._fdt))
return fdt_off_dt_strings(self._fdt)
def off_mem_rsvmap(self):
"""Return the start of the memory reserve map
@ -237,7 +236,7 @@ class Fdt:
Returns:
Start offset of memory reserve map
"""
return check_err(fdt_off_mem_rsvmap(self._fdt))
return fdt_off_mem_rsvmap(self._fdt)
def version(self):
"""Return the version of the device tree
@ -245,7 +244,7 @@ class Fdt:
Returns:
Version number of the device tree
"""
return check_err(fdt_version(self._fdt))
return fdt_version(self._fdt)
def last_comp_version(self):
"""Return the last compatible version of the device tree
@ -253,7 +252,7 @@ class Fdt:
Returns:
Last compatible version number of the device tree
"""
return check_err(fdt_last_comp_version(self._fdt))
return fdt_last_comp_version(self._fdt)
def boot_cpuid_phys(self):
"""Return the physical boot CPU ID
@ -261,7 +260,7 @@ class Fdt:
Returns:
Physical boot CPU ID
"""
return check_err(fdt_boot_cpuid_phys(self._fdt))
return fdt_boot_cpuid_phys(self._fdt)
def size_dt_strings(self):
"""Return the start of the device-tree string area
@ -269,7 +268,7 @@ class Fdt:
Returns:
Start offset of string area
"""
return check_err(fdt_size_dt_strings(self._fdt))
return fdt_size_dt_strings(self._fdt)
def size_dt_struct(self):
"""Return the start of the device-tree struct area
@ -277,7 +276,7 @@ class Fdt:
Returns:
Start offset of struct area
"""
return check_err(fdt_size_dt_struct(self._fdt))
return fdt_size_dt_struct(self._fdt)
def num_mem_rsv(self, quiet=()):
"""Return the number of memory reserve-map records
@ -398,77 +397,6 @@ class Fdt:
return pdata
return Property(pdata[0], pdata[1])
def get_property(self, nodeoffset, prop_name, quiet=()):
"""Obtains a property by name
Args:
nodeoffset: Offset to the node to check
prop_name: Name of property to get
quiet: Errors to ignore (empty to raise on all errors)
Returns:
Property object, or None if not found
Raises:
FdtException on error (e.g. invalid prop_offset or device
tree format)
"""
pdata = check_err_null(
fdt_get_property(self._fdt, nodeoffset, prop_name), quiet)
if isinstance(pdata, (int)):
return pdata
return Property(pdata[0], pdata[1])
@staticmethod
def create_empty_tree(size, quiet=()):
"""Create an empty device tree ready for use
Args:
size: Size of device tree in bytes
Returns:
Fdt object containing the device tree
"""
data = bytearray(size)
err = check_err(fdt_create_empty_tree(data, size), quiet)
if err:
return err
return Fdt(data)
def open_into(self, size, quiet=()):
"""Move the device tree into a larger or smaller space
This creates a new device tree of size @size and moves the existing
device tree contents over to that. It can be used to create more space
in a device tree.
Args:
size: Required new size of device tree in bytes
"""
fdt = bytearray(size)
fdt[:len(self._fdt)] = self._fdt
err = check_err(fdt_open_into(self._fdt, fdt, size), quiet)
if err:
return err
self._fdt = fdt
def pack(self, quiet=()):
"""Pack the device tree to remove unused space
This adjusts the tree in place.
Args:
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if any error occurs
"""
err = check_err(fdt_pack(self._fdt), quiet)
if err:
return err
del self._fdt[self.totalsize():]
return err
def getprop(self, nodeoffset, prop_name, quiet=()):
"""Get a property from a node
@ -478,7 +406,9 @@ class Fdt:
quiet: Errors to ignore (empty to raise on all errors)
Returns:
Value of property as a string, or -ve error number
Value of property as a Property object (which can be used as a
bytearray/string), or -ve error number. On failure, returns an
integer error
Raises:
FdtError if any error occurs (e.g. the property is not found)
@ -487,26 +417,6 @@ class Fdt:
quiet)
if isinstance(pdata, (int)):
return pdata
return str(pdata[0])
def getprop_obj(self, nodeoffset, prop_name, quiet=()):
"""Get a property from a node as a Property object
Args:
nodeoffset: Node offset containing property to get
prop_name: Name of property to get
quiet: Errors to ignore (empty to raise on all errors)
Returns:
Property object, or None if not found
Raises:
FdtError if any error occurs (e.g. the property is not found)
"""
pdata = check_err_null(fdt_getprop(self._fdt, nodeoffset, prop_name),
quiet)
if isinstance(pdata, (int)):
return None
return Property(prop_name, bytearray(pdata[0]))
def get_phandle(self, nodeoffset):
@ -536,12 +446,101 @@ class Fdt:
"""
return check_err(fdt_parent_offset(self._fdt, nodeoffset), quiet)
def node_offset_by_phandle(self, phandle, quiet=()):
"""Get the offset of a node with the given phandle
Args:
phandle: Phandle to search for
quiet: Errors to ignore (empty to raise on all errors)
Returns:
The offset of node with that phandle, if any
Raises:
FdtException if no node found or other error occurs
"""
return check_err(fdt_node_offset_by_phandle(self._fdt, phandle), quiet)
class Fdt(FdtRo):
"""Device tree class, supporting all operations
The Fdt object is created is created from a device tree binary file,
e.g. with something like:
fdt = Fdt(open("filename.dtb").read())
Operations can then be performed using the methods in this class. Each
method xxx(args...) corresponds to a libfdt function fdt_xxx(fdt, args...).
All methods raise an FdtException if an error occurs. To avoid this
behaviour a 'quiet' parameter is provided for some functions. This
defaults to empty, but you can pass a list of errors that you expect.
If one of these errors occurs, the function will return an error number
(e.g. -NOTFOUND).
"""
def __init__(self, data):
FdtRo.__init__(self, data)
@staticmethod
def create_empty_tree(size, quiet=()):
"""Create an empty device tree ready for use
Args:
size: Size of device tree in bytes
Returns:
Fdt object containing the device tree
"""
data = bytearray(size)
err = check_err(fdt_create_empty_tree(data, size), quiet)
if err:
return err
return Fdt(data)
def resize(self, size, quiet=()):
"""Move the device tree into a larger or smaller space
This creates a new device tree of size @size and moves the existing
device tree contents over to that. It can be used to create more space
in a device tree. Note that the Fdt object remains the same, but it
now has a new bytearray holding the contents.
Args:
size: Required new size of device tree in bytes
"""
fdt = bytearray(size)
err = check_err(fdt_open_into(self._fdt, fdt, size), quiet)
if err:
return err
self._fdt = fdt
def pack(self, quiet=()):
"""Pack the device tree to remove unused space
This adjusts the tree in place.
Args:
quiet: Errors to ignore (empty to raise on all errors)
Returns:
Error code, or 0 if OK
Raises:
FdtException if any error occurs
"""
err = check_err(fdt_pack(self._fdt), quiet)
if err:
return err
del self._fdt[self.totalsize():]
return err
def set_name(self, nodeoffset, name, quiet=()):
"""Set the name of a node
Args:
nodeoffset: Node offset of node to update
name: New node name
name: New node name (string without \0)
Returns:
Error code, or 0 if OK
@ -549,6 +548,8 @@ class Fdt:
Raises:
FdtException if no parent found or other error occurs
"""
if chr(0) in name:
raise ValueError('Property contains embedded nul characters')
return check_err(fdt_set_name(self._fdt, nodeoffset, name), quiet)
def setprop(self, nodeoffset, prop_name, val, quiet=()):
@ -613,7 +614,8 @@ class Fdt:
Args:
nodeoffset: Node offset containing the property to create/update
prop_name: Name of property
val: Value to write (string without nul terminator)
val: Value to write (string without nul terminator). Unicode is
supposed by encoding to UTF-8
quiet: Errors to ignore (empty to raise on all errors)
Returns:
@ -622,7 +624,7 @@ class Fdt:
Raises:
FdtException if no parent found or other error occurs
"""
val += '\0'
val = val.encode('utf-8') + '\0'
return check_err(fdt_setprop(self._fdt, nodeoffset, prop_name,
val, len(val)), quiet)
@ -638,21 +640,6 @@ class Fdt:
"""
return check_err(fdt_delprop(self._fdt, nodeoffset, prop_name))
def node_offset_by_phandle(self, phandle, quiet=()):
"""Get the offset of a node with the given phandle
Args:
phandle: Phandle to search for
quiet: Errors to ignore (empty to raise on all errors)
Returns:
The offset of node with that phandle, if any
Raises:
FdtException if no node found or other error occurs
"""
return check_err(fdt_node_offset_by_phandle(self._fdt, phandle), quiet)
def del_node(self, nodeoffset):
"""Delete a node
@ -696,16 +683,20 @@ class Property(bytearray):
return self.as_cell('q')
def as_str(self):
return self[:-1]
"""Unicode is supported by decoding from UTF-8"""
if self[-1] != 0:
raise ValueError('Property lacks nul termination')
if 0 in self[:-1]:
raise ValueError('Property contains embedded nul characters')
return self[:-1].decode('utf-8')
class FdtSw(object):
class FdtSw(FdtRo):
"""Software interface to create a device tree from scratch
The methods in this class work by adding to an existing 'partial' device
tree buffer of a fixed size created by instantiating this class. When the
tree is complete, call finish() to complete the device tree so that it can
be used.
tree is complete, call as_fdt() to obtain a device tree ready to be used.
Similarly with nodes, a new node is started with begin_node() and finished
with end_node().
@ -713,58 +704,87 @@ class FdtSw(object):
The context manager functions can be used to make this a bit easier:
# First create the device tree with a node and property:
with FdtSw(small_size) as sw:
with sw.AddNode('node'):
sw.property_u32('reg', 2)
fdt = sw.AsFdt()
sw = FdtSw()
with sw.add_node('node'):
sw.property_u32('reg', 2)
fdt = sw.as_fdt()
# Now we can use it as a real device tree
fdt.setprop_u32(0, 'reg', 3)
The size hint provides a starting size for the space to be used by the
device tree. This will be increased automatically as needed as new items
are added to the tree.
"""
def __init__(self, size, quiet=()):
fdtrw = bytearray(size)
err = check_err(fdt_create(fdtrw, size))
INC_SIZE = 1024 # Expand size by this much when out of space
def __init__(self, size_hint=None):
"""Create a new FdtSw object
Args:
size_hint: A hint as to the initial size to use
Raises:
ValueError if size_hint is negative
Returns:
FdtSw object on success, else integer error code (if not raising)
"""
if not size_hint:
size_hint = self.INC_SIZE
fdtsw = bytearray(size_hint)
err = check_err(fdt_create(fdtsw, size_hint))
if err:
return err
self._fdtrw = fdtrw
self._fdt = fdtsw
def __enter__(self):
"""Contact manager to use to create a device tree via software"""
return self
def __exit__(self, type, value, traceback):
check_err(fdt_finish(self._fdtrw))
def AsFdt(self):
def as_fdt(self):
"""Convert a FdtSw into an Fdt so it can be accessed as normal
Note that finish() must be called before this function will work. If
you are using the context manager (see 'with' code in the FdtSw class
comment) then this will happen automatically.
Creates a new Fdt object from the work-in-progress device tree. This
does not call fdt_finish() on the current object, so it is possible to
add more nodes/properties and call as_fdt() again to get an updated
tree.
Returns:
Fdt object allowing access to the newly created device tree
"""
return Fdt(self._fdtrw)
fdtsw = bytearray(self._fdt)
check_err(fdt_finish(fdtsw))
return Fdt(fdtsw)
def resize(self, size, quiet=()):
def check_space(self, val):
"""Check if we need to add more space to the FDT
This should be called with the error code from an operation. If this is
-NOSPACE then the FDT will be expanded to have more space, and True will
be returned, indicating that the operation needs to be tried again.
Args:
val: Return value from the operation that was attempted
Returns:
True if the operation must be retried, else False
"""
if check_err(val, QUIET_NOSPACE) < 0:
self.resize(len(self._fdt) + self.INC_SIZE)
return True
return False
def resize(self, size):
"""Resize the buffer to accommodate a larger tree
Args:
size: New size of tree
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if no node found or other error occurs
FdtException on any error
"""
fdt = bytearray(size)
fdt[:len(self._fdtrw)] = self._fdtrw
err = check_err(fdt_resize(self._fdtrw, fdt, size), quiet)
if err:
return err
self._fdtrw = fdt
err = check_err(fdt_resize(self._fdt, fdt, size))
self._fdt = fdt
def add_reservemap_entry(self, addr, size, quiet=()):
def add_reservemap_entry(self, addr, size):
"""Add a new memory reserve map entry
Once finished adding, you must call finish_reservemap().
@ -772,26 +792,24 @@ class FdtSw(object):
Args:
addr: 64-bit start address
size: 64-bit size
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if no node found or other error occurs
FdtException on any error
"""
return check_err(fdt_add_reservemap_entry(self._fdtrw, addr, size),
quiet)
while self.check_space(fdt_add_reservemap_entry(self._fdt, addr,
size)):
pass
def finish_reservemap(self, quiet=()):
def finish_reservemap(self):
"""Indicate that there are no more reserve map entries to add
Args:
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if no node found or other error occurs
FdtException on any error
"""
return check_err(fdt_finish_reservemap(self._fdtrw), quiet)
while self.check_space(fdt_finish_reservemap(self._fdt)):
pass
def begin_node(self, name, quiet=()):
def begin_node(self, name):
"""Begin a new node
Use this before adding properties to the node. Then call end_node() to
@ -800,14 +818,14 @@ class FdtSw(object):
Args:
name: Name of node to begin
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if no node found or other error occurs
FdtException on any error
"""
return check_err(fdt_begin_node(self._fdtrw, name), quiet)
while self.check_space(fdt_begin_node(self._fdt, name)):
pass
def property_string(self, name, string, quiet=()):
def property_string(self, name, string):
"""Add a property with a string value
The string will be nul-terminated when written to the device tree
@ -815,14 +833,14 @@ class FdtSw(object):
Args:
name: Name of property to add
string: String value of property
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if no node found or other error occurs
FdtException on any error
"""
return check_err(fdt_property_string(self._fdtrw, name, string), quiet)
while self.check_space(fdt_property_string(self._fdt, name, string)):
pass
def property_u32(self, name, val, quiet=()):
def property_u32(self, name, val):
"""Add a property with a 32-bit value
Write a single-cell value to the device tree
@ -830,14 +848,14 @@ class FdtSw(object):
Args:
name: Name of property to add
val: Value of property
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if no node found or other error occurs
FdtException on any error
"""
return check_err(fdt_property_u32(self._fdtrw, name, val), quiet)
while self.check_space(fdt_property_u32(self._fdt, name, val)):
pass
def property_u64(self, name, val, quiet=()):
def property_u64(self, name, val):
"""Add a property with a 64-bit value
Write a double-cell value to the device tree in big-endian format
@ -845,14 +863,14 @@ class FdtSw(object):
Args:
name: Name of property to add
val: Value of property
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if no node found or other error occurs
FdtException on any error
"""
return check_err(fdt_property_u64(self._fdtrw, name, val), quiet)
while self.check_space(fdt_property_u64(self._fdt, name, val)):
pass
def property_cell(self, name, val, quiet=()):
def property_cell(self, name, val):
"""Add a property with a single-cell value
Write a single-cell value to the device tree
@ -863,11 +881,12 @@ class FdtSw(object):
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if no node found or other error occurs
FdtException on any error
"""
return check_err(fdt_property_cell(self._fdtrw, name, val), quiet)
while self.check_space(fdt_property_cell(self._fdt, name, val)):
pass
def property(self, name, val, quiet=()):
def property(self, name, val):
"""Add a property
Write a new property with the given value to the device tree. The value
@ -879,11 +898,13 @@ class FdtSw(object):
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if no node found or other error occurs
FdtException on any error
"""
return check_err(_fdt_property(self._fdtrw, name, val, len(val)), quiet)
while self.check_space(fdt_property_stub(self._fdt, name, val,
len(val))):
pass
def end_node(self, quiet=()):
def end_node(self):
"""End a node
Use this after adding properties to a node to close it off. You can also
@ -893,24 +914,12 @@ class FdtSw(object):
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if no node found or other error occurs
FdtException on any error
"""
return check_err(fdt_end_node(self._fdtrw), quiet)
while self.check_space(fdt_end_node(self._fdt)):
pass
def finish(self, quiet=()):
"""Finish writing the device tree
This closes off the device tree ready for use
Args:
quiet: Errors to ignore (empty to raise on all errors)
Raises:
FdtException if no node found or other error occurs
"""
return check_err(fdt_finish(self._fdtrw), quiet)
def AddNode(self, name):
def add_node(self, name):
"""Create a new context for adding a node
When used in a 'with' clause this starts a new node and finishes it
@ -919,7 +928,7 @@ class FdtSw(object):
Args:
name: Name of node to add
"""
return NodeAdder(self._fdtrw, name)
return NodeAdder(self, name)
class NodeAdder():
@ -927,26 +936,30 @@ class NodeAdder():
This allows you to add nodes in a more natural way:
with fdtsw.AddNode('name'):
with fdtsw.add_node('name'):
fdtsw.property_string('test', 'value')
The node is automatically completed with a call to end_node() when the
context exits.
"""
def __init__(self, fdt, name):
self._fdt = fdt
def __init__(self, fdtsw, name):
self._fdt = fdtsw
self._name = name
def __enter__(self):
check_err(fdt_begin_node(self._fdt, self._name))
self._fdt.begin_node(self._name)
def __exit__(self, type, value, traceback):
check_err(fdt_end_node(self._fdt))
self._fdt.end_node()
%}
%rename(fdt_property) fdt_property_func;
typedef int fdt32_t;
/*
* fdt32_t is a big-endian 32-bit value defined to uint32_t in libfdt_env.h
* so use the same type here.
*/
typedef uint32_t fdt32_t;
%include "libfdt/fdt.h"
@ -1039,16 +1052,17 @@ typedef int fdt32_t;
%warnfilter(302) fdt_property;
/* These are macros in the header so have to be redefined here */
int fdt_magic(const void *fdt);
int fdt_totalsize(const void *fdt);
int fdt_off_dt_struct(const void *fdt);
int fdt_off_dt_strings(const void *fdt);
int fdt_off_mem_rsvmap(const void *fdt);
int fdt_version(const void *fdt);
int fdt_last_comp_version(const void *fdt);
int fdt_boot_cpuid_phys(const void *fdt);
int fdt_size_dt_strings(const void *fdt);
int fdt_size_dt_struct(const void *fdt);
uint32_t fdt_magic(const void *fdt);
uint32_t fdt_totalsize(const void *fdt);
uint32_t fdt_off_dt_struct(const void *fdt);
uint32_t fdt_off_dt_strings(const void *fdt);
uint32_t fdt_off_mem_rsvmap(const void *fdt);
uint32_t fdt_version(const void *fdt);
uint32_t fdt_last_comp_version(const void *fdt);
uint32_t fdt_boot_cpuid_phys(const void *fdt);
uint32_t fdt_size_dt_strings(const void *fdt);
uint32_t fdt_size_dt_struct(const void *fdt);
int fdt_property_string(void *fdt, const char *name, const char *val);
int fdt_property_cell(void *fdt, const char *name, uint32_t val);
@ -1056,6 +1070,6 @@ int fdt_property_cell(void *fdt, const char *name, uint32_t val);
* This function has a stub since the name fdt_property is used for both a
* function and a struct, which confuses SWIG.
*/
int _fdt_property(void *fdt, const char *name, const char *val, int len);
int fdt_property_stub(void *fdt, const char *name, const char *val, int len);
%include <../libfdt/libfdt.h>

2
tools/dtoc/fdt.py
View file

@ -287,7 +287,7 @@ class Node:
fdt_obj = self._fdt._fdt_obj
if fdt_obj.setprop_u32(self.Offset(), prop_name, 0,
(libfdt.NOSPACE,)) == -libfdt.NOSPACE:
fdt_obj.open_into(fdt_obj.totalsize() + 1024)
fdt_obj.resize(fdt_obj.totalsize() + 1024)
fdt_obj.setprop_u32(self.Offset(), prop_name, 0)
self.props[prop_name] = Prop(self, -1, prop_name, '\0' * 4)
self._fdt.Invalidate()

2
tools/dtoc/test_fdt.py
View file

@ -233,7 +233,7 @@ class TestProp(unittest.TestCase):
Return fdt.Prop object for this property
"""
p = self.fdt.get_property(self.node.Offset(), prop_name)
p = self.fdt.getprop(self.node.Offset(), prop_name)
return fdt.Prop(self.node, -1, prop_name, p)
def testMakeProp(self):