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The SHA config register should be cleared, so that only required bits are set on init(). Doing so ensures that previous settings that used the engine in a different mode, e.g HMAC, do not survive. BRANCH=none BUG=chrome-os-partner:43025,chrome-os-partner:47524 TEST=build succeeds; tpmtest.py tests pass; manufacture works (cherry picked from commit 9b3619ddd7304359ee17e243923f1e47c925cb21) Signed-off-by: nagendra modadugu <ngm@google.com> Reviewed-on: https://chromium-review.googlesource.com/359418 Reviewed-by: Marius Schilder <mschilder@chromium.org> Reviewed-by: Vadim Bendebury <vbendeb@chromium.org> Commit-Queue: Vadim Bendebury <vbendeb@chromium.org> Tested-by: Vadim Bendebury <vbendeb@chromium.org> Change-Id: If5a79af06ea7512f19775a2f34d741b144f211f7 Reviewed-on: https://chromium-review.googlesource.com/358982 Commit-Ready: Vadim Bendebury <vbendeb@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly