+
+def GetByte(node, propname, default=None):
+ """Get an byte from a property
+
+ Args:
+ node: Node object to read from
+ propname: property name to read
+ default: Default value to use if the node/property do not exist
+
+ Returns:
+ Byte value read, or default if none
+ """
+ prop = node.props.get(propname)
+ if not prop:
+ return default
+ value = prop.value
+ if isinstance(value, list):
+ raise ValueError("Node '%s' property '%s' has list value: expecting "
+ "a single byte" % (node.name, propname))
+ if len(value) != 1:
+ raise ValueError("Node '%s' property '%s' has length %d, expecting %d" %
+ (node.name, propname, len(value), 1))
+ return ord(value[0])
+
+def GetBytes(node, propname, size, default=None):
+ """Get a set of bytes from a property
+
+ Args:
+ node (Node): Node object to read from
+ propname (str): property name to read
+ size (int): Number of bytes to expect
+ default (bytes): Default value or None
+
+ Returns:
+ bytes: Bytes value read, or default if none
+ """
+ prop = node.props.get(propname)
+ if not prop:
+ return default
+ if len(prop.bytes) != size:
+ raise ValueError("Node '%s' property '%s' has length %d, expecting %d" %
+ (node.name, propname, len(prop.bytes), size))
+ return prop.bytes
+
+def GetPhandleList(node, propname):
+ """Get a list of phandles from a property
+
+ Args:
+ node: Node object to read from
+ propname: property name to read
+
+ Returns:
+ List of phandles read, each an integer
+ """
+ prop = node.props.get(propname)
+ if not prop:
+ return None
+ value = prop.value
+ if not isinstance(value, list):
+ value = [value]
+ return [fdt32_to_cpu(v) for v in value]
+
+def GetDatatype(node, propname, datatype):
+ """Get a value of a given type from a property
+
+ Args:
+ node: Node object to read from
+ propname: property name to read
+ datatype: Type to read (str or int)
+
+ Returns:
+ value read, or None if none
+
+ Raises:
+ ValueError if datatype is not str or int
+ """
+ if datatype == str:
+ return GetString(node, propname)
+ elif datatype == int:
+ return GetInt(node, propname)
+ raise ValueError("fdt_util internal error: Unknown data type '%s'" %
+ datatype)