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authorMary Ruthven <mruthven@chromium.org>2020-10-19 19:47:24 +0000
committerCommit Bot <commit-bot@chromium.org>2020-10-29 18:57:56 +0000
commit9589af4d494a070ff02b4cd6fe7c33b1b2b40623 (patch)
tree0d58ca97092f0b5a1617c83564563766fb4b6a05 /util/signer/ec_RW-manifest-dev.json
parent41997f691cfd87332af4ad155f8cb9268d86cae9 (diff)
downloadchrome-ec-9589af4d494a070ff02b4cd6fe7c33b1b2b40623.tar.gz
Revert "cr50: debounce successive TPM reset pulses"
This reverts commit 4805196e894a73a2a1285f1cd622d160ad248f77. Reason for revert: We aren't planning on landing this in the branch. Reduce the difference between TOT and the branch by reverting this. BUG=b:164130916 TEST=run ccd open with TOT image Original change's description: > cr50: debounce successive TPM reset pulses > > Some platforms generate more than one pulse when resetting, many Intel > SOCs generate two pulses, some other chips could go even higher. > > TPM reset on Cr50 is processed asynchronously, repetitive pulses > result in multiple reset processing cycles.In case pulses are coming > too soon one after another this could cause some race conditions. > > Let's ignore repetitive reset pulses unless there has been an attempt > by the host to read a register (which is usually the very first action > of the AP when booting up). > > BRANCH=cr50, cr50-mp > BUG=none > TEST=observed that only one reset is happening on an Octopus device, > while there are two pulses present on the PLT_RST_L line. > > Verified proper reboot multiple times in a row. > > Change-Id: Ie1b124d41be0388bd8e12d0084827782de62cfa0 > Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> > Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1755059 > Reviewed-by: Mary Ruthven <mruthven@chromium.org> Bug: none Change-Id: Ifbe8afea87c522c94cf9ab73cca8a1489ec3956b Signed-off-by: Mary Ruthven <mruthven@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2485927
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