On Sat, Jun 18, 2016 at 05:10:25PM +0200, Jarkko Sakkinen wrote: > These patches implement support for runtime PM with TPM2 CRB chips such > as PTT in Skylake. > > This is very naive implementation since the TPM is resumed and supended > for every transaction thus causing total 40 ms latency for each > transaction but for the existing use cases this shouldn't be an issue. > > Jarkko Sakkinen (3): > tpm_crb: fix crb_req_canceled behavior > tpm, tpm_crb: remove wmb()'s > tpm, tpm_crb: runtime power management > > drivers/char/tpm/tpm-interface.c | 3 ++ > drivers/char/tpm/tpm_crb.c | 60 > +++++++++++++++++++++++++++++++++++----- > 2 files changed, 56 insertions(+), 7 deletions(-)
Reviewing myself: * I fsckd the description. The latency is whopping 400 ms, not 4 ms. Sorry about that. Thus it's better to use autosuspend. * Callbacks should take tpm_mutex before doing anything. I guess that tpm_tis could later on also take advantage of this work? /Jarkko
