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https://github.com/brain-hackers/u-boot-brain
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f6e02497ae
Since the state module holds references to all the device trees used by binman, it must be updated when the device trees are updated. Add support for this. Signed-off-by: Simon Glass <sjg@chromium.org>
65 lines
2.1 KiB
Python
65 lines
2.1 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
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# Copyright (c) 2018 Google, Inc
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# Written by Simon Glass <sjg@chromium.org>
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#
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# Entry-type module for U-Boot device tree files
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#
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import state
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from entry import Entry
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from blob import Entry_blob
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class Entry_blob_dtb(Entry_blob):
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"""A blob that holds a device tree
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This is a blob containing a device tree. The contents of the blob are
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obtained from the list of available device-tree files, managed by the
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'state' module.
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"""
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def __init__(self, section, etype, node):
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Entry_blob.__init__(self, section, etype, node)
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def ObtainContents(self):
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"""Get the device-tree from the list held by the 'state' module"""
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self._filename = self.GetDefaultFilename()
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self._pathname, _ = state.GetFdtContents(self.GetFdtEtype())
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return Entry_blob.ReadBlobContents(self)
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def ProcessContents(self):
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"""Re-read the DTB contents so that we get any calculated properties"""
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_, indata = state.GetFdtContents(self.GetFdtEtype())
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data = self.CompressData(indata)
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return self.ProcessContentsUpdate(data)
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def GetFdtEtype(self):
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"""Get the entry type of this device tree
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This can be 'u-boot-dtb', 'u-boot-spl-dtb' or 'u-boot-tpl-dtb'
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Returns:
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Entry type if any, e.g. 'u-boot-dtb'
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"""
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return None
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def GetFdts(self):
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"""Get the device trees used by this entry
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Returns:
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Dict:
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key: Filename from this entry (without the path)
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value: Tuple:
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Fdt object for this dtb, or None if not available
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Filename of file containing this dtb
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"""
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fname = self.GetDefaultFilename()
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return {self.GetFdtEtype(): [self, fname]}
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def WriteData(self, data, decomp=True):
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ok = Entry_blob.WriteData(self, data, decomp)
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# Update the state module, since it has the authoritative record of the
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# device trees used. If we don't do this, then state.GetFdtContents()
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# will still return the old contents
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state.UpdateFdtContents(self.GetFdtEtype(), data)
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return ok
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