tools/dtoc/fdt.py

6 # SPDX-License-Identifier:      GPL-2.0+
15 # This deals with a device tree, presenting it as an assortment of Node and
17 # contains the base classes and defines the high-level API. You can use
20 # This implementation uses a libfdt Python library to access the device tree,
32     """A device tree property
35         name: Property name (as per the device tree)
105                     TYPE_INT: a byte-swapped integer stored as a 4-byte string
106                     TYPE_BYTE: a byte stored as a single-byte string
112         count = len(strings) - 1
113         if count > 0 and not strings[-1]:
114             for string in strings[:-1]:
128                 return TYPE_STRING, strings[:-1]
166     """A device tree node
169         offset: Integer offset in the device tree
170         name: Device tree node tname
172         _fdt: Device tree object
212         searching into subnodes so that the entire tree is built.
222             sep = '' if self.path[-1] == '/' else '/'
234         Note: This does not take account of property offsets - these will not
238             #print '%s: %d -> %d\n' % (self.path, self._offset, my_offset)
261     """Provides simple access to a flat device tree blob using libfdts.
265       _root: Root of device tree (a Node object)
279         """Scan a device tree, building up a tree of Node objects
292         """Get the root Node of the device tree
315         """Flush device tree changes back to the file
317         If the device tree has changed in memory, write it back to the file.
323         """Pack the device tree down to its minimum size
326         build up in the device tree binary.
388             offset: Offset within the 'struct' region of the device tree
390             Position of @offset within the device tree binary