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dtoc: Make use of the new pylibfdt methods

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Now that pylibfdt supports a fuller API we don't need to directly call
the libfdt stubs. Update the code to use the Fdt methods instead.

Some other cases remain which will be tidied up in a later commit, since
they need larger changes.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2018-07-06 10:27:26 -06:00
parent 57f0bc428a
commit 117f57b75a
1 changed files with 14 additions and 12 deletions

26
tools/dtoc/fdt.py
View File

@ -10,6 +10,7 @@ import sys
import fdt_util
import libfdt
from libfdt import QUIET_NOTFOUND
# This deals with a device tree, presenting it as an assortment of Node and
# Prop objects, representing nodes and properties, respectively. This file
@ -211,22 +212,22 @@ class Node:
This fills in the props and subnodes properties, recursively
searching into subnodes so that the entire tree is built.
"""
fdt_obj = self._fdt._fdt_obj
self.props = self._fdt.GetProps(self)
phandle = self.props.get('phandle')
phandle = fdt_obj.get_phandle(self.Offset())
if phandle:
val = fdt_util.fdt32_to_cpu(phandle.value)
self._fdt.phandle_to_node[val] = self
self._fdt.phandle_to_node[phandle] = self
offset = libfdt.fdt_first_subnode(self._fdt.GetFdt(), self.Offset())
offset = fdt_obj.first_subnode(self.Offset(), QUIET_NOTFOUND)
while offset >= 0:
sep = '' if self.path[-1] == '/' else '/'
name = self._fdt._fdt_obj.get_name(offset)
name = fdt_obj.get_name(offset)
path = self.path + sep + name
node = Node(self._fdt, self, offset, name, path)
self.subnodes.append(node)
node.Scan()
offset = libfdt.fdt_next_subnode(self._fdt.GetFdt(), offset)
offset = fdt_obj.next_subnode(offset, QUIET_NOTFOUND)
def Refresh(self, my_offset):
"""Fix up the _offset for each node, recursively
@ -324,9 +325,8 @@ class Fdt:
When nodes and properties shrink or are deleted, wasted space can
build up in the device tree binary.
"""
CheckErr(libfdt.fdt_pack(self._fdt), 'pack')
fdt_len = libfdt.fdt_totalsize(self._fdt)
del self._fdt[fdt_len:]
CheckErr(self._fdt_obj.pack(), 'pack')
self.Invalidate()
def GetFdt(self):
"""Get the contents of the FDT
@ -363,13 +363,15 @@ class Fdt:
ValueError: if the node does not exist.
"""
props_dict = {}
poffset = libfdt.fdt_first_property_offset(self._fdt, node._offset)
poffset = self._fdt_obj.first_property_offset(node._offset,
QUIET_NOTFOUND)
while poffset >= 0:
p = self._fdt_obj.get_property_by_offset(poffset)
prop = Prop(node, poffset, p.name, p)
props_dict[prop.name] = prop
poffset = libfdt.fdt_next_property_offset(self._fdt, poffset)
poffset = self._fdt_obj.next_property_offset(poffset,
QUIET_NOTFOUND)
return props_dict
def Invalidate(self):
@ -395,7 +397,7 @@ class Fdt:
Returns:
Position of @offset within the device tree binary
"""
return libfdt.fdt_off_dt_struct(self._fdt) + offset
return self._fdt_obj.off_dt_struct() + offset
@classmethod
def Node(self, fdt, parent, offset, name, path):