Vadim Bendebury 5a6bb19a88
tpm: reset communications channels when resetting TPM ...
TPM resets happen asynchronously, conceivably there is some interface
(i2cs or sps) activity under way when TPM is reset.
Sps driver provides a means of disconnecting the client of the driver,
while the i2cs driver does not. Come to think of it, there is no real
need to provide a special function to disconnect a client, this makes
API simpler and allows to add driver initialization to the client
registration function.
To make tpm_registers.c more flexible - allow to register a callback
for interface initialization, this way when TPM is reset, the
interface can be also re-initialized and is guaranteed to start from
scratch after reset.
BRANCH=none
BUG=chrome-os-partner:52366
TEST=both firmware_TPMExtend and firmware_TPMKernelVersion autotests
pass
Change-Id: I212166a23f9cd512d8f75315377d1f5620aea070
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org >
Reviewed-on: https://chromium-review.googlesource.com/388886
Reviewed-by: Randall Spangler <rspangler@chromium.org >
Reviewed-by: Bill Richardson <wfrichar@chromium.org >
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