[PATCH v4 0/4] tpm/tpm_crb: implement power management.
From: Tomas Winkler
Date: Sat Oct 08 2016 - 08:01:50 EST
Te overall platform ability to enter a low power state is also
conditioned on the ability of a tpm device to go to idle state.
This series should provide this feature.
Unfortunately, there is a HW bug on Intel PTT devices on Skylake,
Kabylake, and Broxton devices, where certain registers lost retention
during TPM idle state. Hence this implementation takes this into
consideration and implement the feature based only on access to
registers that retain their state. This still conforms to the spec
and should be correct also on non Intle devices.
V2: Utilize runtime_pm for driving tpm crb idle states.
V3. fix lower case corruption in the first patch
V4. Fix unbalanced runtime pm get and put
Tomas Winkler (4):
tpm/tpm_crb: implement tpm crb idle state
tmp/tpm_crb: fix Intel PTT hw bug during idle state
tpm/tpm_crb: open code the crb_init into acpi_add
tmp/tpm_crb: implement runtime pm for tpm_crb
drivers/char/tpm/tpm-interface.c | 5 ++
drivers/char/tpm/tpm_crb.c | 166 +++++++++++++++++++++++++++++++++------
2 files changed, 147 insertions(+), 24 deletions(-)