The 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. This path series should be applied on top of the series: 'Small fixes and cleanups for tpm_crb' Tomas Winkler (3): tpm/tpm_crb: implement tpm crb idle state tmp/tpm_crb: fix Intel PTT hw bug during idle state tpm/tpm_crb: cache cmd_size register value. drivers/char/tpm/tpm-interface.c | 21 +++++++ drivers/char/tpm/tpm_crb.c | 124 ++++++++++++++++++++++++++++++++++----- include/linux/tpm.h | 3 +- 3 files changed, 132 insertions(+), 16 deletions(-) -- 2.7.4 ------------------------------------------------------------------------------ _______________________________________________ tpmdd-devel mailing list tpmdd-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tpmdd-devel
