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dtoc: Add a way for tests to request the fallback library 

We need to test both the normal (Python libfdt module) and fallback (fdtget)
implementations of the Fdt class. Add a way to select which implementation
to use.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2016-09-25 15:52:19 -06:00 committed by sjg
parent 8828254cae
commit 3cb44ba80c
1 changed files with 13 additions and 3 deletions
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16
tools/dtoc/fdt_select.py
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@ -6,6 +6,8 @@
# SPDX-License-Identifier: GPL-2.0+ # SPDX-License-Identifier: GPL-2.0+
# #
import fdt_fallback
# Bring in either the normal fdt library (which relies on libfdt) or the # Bring in either the normal fdt library (which relies on libfdt) or the
# fallback one (which uses fdtget and is slower). Both provide the same # fallback one (which uses fdtget and is slower). Both provide the same
# interface for this file to use. # interface for this file to use.
@ -14,13 +16,21 @@ try:
have_libfdt = True have_libfdt = True
except ImportError: except ImportError:
have_libfdt = False have_libfdt = False
import fdt_fallback
def FdtScan(fname): force_fallback = False
def FdtScan(fname, _force_fallback=False):
"""Returns a new Fdt object from the implementation we are using""" """Returns a new Fdt object from the implementation we are using"""
if have_libfdt: if have_libfdt and not force_fallback and not _force_fallback:
dtb = fdt_normal.FdtNormal(fname) dtb = fdt_normal.FdtNormal(fname)
else: else:
dtb = fdt_fallback.FdtFallback(fname) dtb = fdt_fallback.FdtFallback(fname)
dtb.Scan() dtb.Scan()
return dtb return dtb
def UseFallback(fallback):
global force_fallback
old_val = force_fallback
force_fallback = fallback
return old_val