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# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2018 Google, Inc
# Written by Simon Glass <sjg@chromium.org>
#
# Entry-type module for U-Boot device tree files
#
from binman.entry import Entry
from binman.etype.blob import Entry_blob
class Entry_blob_dtb(Entry_blob):
"""A blob that holds a device tree
This is a blob containing a device tree. The contents of the blob are
obtained from the list of available device-tree files, managed by the
'state' module.
"""
def __init__(self, section, etype, node):
# Put this here to allow entry-docs and help to work without libfdt
global state
from binman import state
super().__init__(section, etype, node)
def ObtainContents(self):
"""Get the device-tree from the list held by the 'state' module"""
self._filename = self.GetDefaultFilename()
self._pathname, _ = state.GetFdtContents(self.GetFdtEtype())
return super().ReadBlobContents()
def ProcessContents(self):
"""Re-read the DTB contents so that we get any calculated properties"""
_, indata = state.GetFdtContents(self.GetFdtEtype())
data = self.CompressData(indata)
return self.ProcessContentsUpdate(data)
def GetFdtEtype(self):
"""Get the entry type of this device tree
This can be 'u-boot-dtb', 'u-boot-spl-dtb' or 'u-boot-tpl-dtb'
Returns:
Entry type if any, e.g. 'u-boot-dtb'
"""
return None
def GetFdts(self):
"""Get the device trees used by this entry
Returns:
Dict:
key: Filename from this entry (without the path)
value: Tuple:
Fdt object for this dtb, or None if not available
Filename of file containing this dtb
"""
fname = self.GetDefaultFilename()
return {self.GetFdtEtype(): [self, fname]}
def WriteData(self, data, decomp=True):
ok = super().WriteData(data, decomp)
# Update the state module, since it has the authoritative record of the
# device trees used. If we don't do this, then state.GetFdtContents()
# will still return the old contents
state.UpdateFdtContents(self.GetFdtEtype(), data)
return ok
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