37 lines
905 B
Python
37 lines
905 B
Python
#!/usr/bin/python
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#
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# Copyright (C) 2016 Google, Inc
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# Written by Simon Glass <sjg@chromium.org>
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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import fdt_fallback
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# Bring in either the normal fdt library (which relies on libfdt) or the
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# fallback one (which uses fdtget and is slower). Both provide the same
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# interface for this file to use.
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try:
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import fdt_normal
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have_libfdt = True
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except ImportError:
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have_libfdt = False
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force_fallback = False
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def FdtScan(fname, _force_fallback=False):
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"""Returns a new Fdt object from the implementation we are using"""
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if have_libfdt and not force_fallback and not _force_fallback:
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dtb = fdt_normal.FdtNormal(fname)
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else:
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dtb = fdt_fallback.FdtFallback(fname)
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dtb.Scan()
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return dtb
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def UseFallback(fallback):
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global force_fallback
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old_val = force_fallback
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force_fallback = fallback
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return old_val
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