Previously, sleep was being reenabled only after tpm fifo reads as
that would typcially be near the end of a host driven TPM
command. However, in the case the host reads or writes to the STS
register, then sleep would not be re-enabled. Moved the re-enable
point to at the end of every i2cs interrupt. Since sleep is delayed by
1 second prior to being reenabled then Cr50 will not go to sleep in
the middle of TPM command since the host is either writing or reading
STS at a much faster rate when a TPM command is being executed.
BRANCH=none
BUG=chrome-os-partner:40397
TEST=manual
Added a debug counter in idle.c and shortened sleep delays from 3
minutes to 5 seconds. Unplugged suzyq and verified that when
reconnected, the counter was incrementing to verify that Reef would
go to sleep. Also verified that TPM worked successfully and kernel
was launched.
Change-Id: I03ad33ed3591bbba24b5c56445c06d0e11368019
Signed-off-by: Scott <scollyer@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/401808
Commit-Ready: Scott Collyer <scollyer@chromium.org>
Tested-by: Scott Collyer <scollyer@chromium.org>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
450b944ca9