dtoc: Add methods for adding and updating properties
Add a few more functions which allow creating and modifying property
values. If only we could do this so easily in the real world.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/dtoc/fdt.py b/tools/dtoc/fdt.py
index 26f4a4e..c5054e8 100644
--- a/tools/dtoc/fdt.py
+++ b/tools/dtoc/fdt.py
@@ -175,6 +175,16 @@
self.type = TYPE_INT
self.dirty = True
+ def SetData(self, bytes):
+ """Set the value of a property as bytes
+
+ Args:
+ bytes: New property value to set
+ """
+ self.bytes = str(bytes)
+ self.type, self.value = self.BytesToValue(bytes)
+ self.dirty = True
+
def Sync(self, auto_resize=False):
"""Sync property changes back to the device tree
@@ -326,18 +336,78 @@
"""
self.props[prop_name] = Prop(self, None, prop_name, '\0' * 4)
+ def AddEmptyProp(self, prop_name, len):
+ """Add a property with a fixed data size, for filling in later
+
+ The device tree is marked dirty so that the value will be written to
+ the blob on the next sync.
+
+ Args:
+ prop_name: Name of property
+ len: Length of data in property
+ """
+ value = chr(0) * len
+ self.props[prop_name] = Prop(self, None, prop_name, value)
+
def SetInt(self, prop_name, val):
"""Update an integer property int the device tree.
This is not allowed to change the size of the FDT.
+ The device tree is marked dirty so that the value will be written to
+ the blob on the next sync.
+
Args:
prop_name: Name of property
val: Value to set
"""
self.props[prop_name].SetInt(val)
+ def SetData(self, prop_name, val):
+ """Set the data value of a property
+
+ The device tree is marked dirty so that the value will be written to
+ the blob on the next sync.
+
+ Args:
+ prop_name: Name of property to set
+ val: Data value to set
+ """
+ self.props[prop_name].SetData(val)
+
+ def SetString(self, prop_name, val):
+ """Set the string value of a property
+
+ The device tree is marked dirty so that the value will be written to
+ the blob on the next sync.
+
+ Args:
+ prop_name: Name of property to set
+ val: String value to set (will be \0-terminated in DT)
+ """
+ self.props[prop_name].SetData(val + chr(0))
+
+ def AddString(self, prop_name, val):
+ """Add a new string property to a node
+
+ The device tree is marked dirty so that the value will be written to
+ the blob on the next sync.
+
+ Args:
+ prop_name: Name of property to add
+ val: String value of property
+ """
+ self.props[prop_name] = Prop(self, None, prop_name, val + chr(0))
+
def AddSubnode(self, name):
+ """Add a new subnode to the node
+
+ Args:
+ name: name of node to add
+
+ Returns:
+ New subnode that was created
+ """
path = self.path + '/' + name
subnode = Node(self._fdt, self, None, name, path)
self.subnodes.append(subnode)