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dtoc: Tidy up property-offset handling

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If a property does not yet have an offset, then that means it exists in
the cache'd fdt but has not yet been synced back to the flat tree. Use
the dirty flag for this so we don't need to check the offset too. Improve
the comments for Prop and Node to make it clear what an offset of None
means.

Also clear the dirty flag after the property is synced.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-03-21 18:24:35 +13:00
parent acd98611c3
commit 37ba9844c2
1 changed files with 7 additions and 3 deletions
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10
tools/dtoc/fdt.py
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@ -103,6 +103,8 @@ class Prop:
"""A device tree property
Properties:
node: Node containing this property
offset: Offset of the property (None if still to be synced)
name: Property name (as per the device tree)
value: Property value as a string of bytes, or a list of strings of
bytes
@ -114,7 +116,7 @@ class Prop:
self.name = name
self.value = None
self.bytes = bytes(data)
self.dirty = False
self.dirty = offset is None
if not data:
self.type = Type.BOOL
self.value = True
@ -228,7 +230,7 @@ class Prop:
Raises:
FdtException if auto_resize is False and there is not enough space
"""
if self._offset is None or self.dirty:
if self.dirty:
node = self._node
fdt_obj = node._fdt._fdt_obj
if auto_resize:
@ -239,13 +241,15 @@ class Prop:
fdt_obj.setprop(node.Offset(), self.name, self.bytes)
else:
fdt_obj.setprop(node.Offset(), self.name, self.bytes)
self.dirty = False
class Node:
"""A device tree node
Properties:
offset: Integer offset in the device tree
parent: Parent Node
offset: Integer offset in the device tree (None if to be synced)
name: Device tree node tname
path: Full path to node, along with the node name itself
_fdt: Device tree object