Re: [PATCH AUTOSEL 5.4 277/350] tpm: Add a flag to indicate TPM power is managed by firmware

Jarkko Sakkinen
2019-12-11T17:57:13Z

On Tue, Dec 10, 2019 at 01:32:15PM -0800, Guenter Roeck wrote:
> On Tue, Dec 10, 2019 at 1:12 PM Sasha Levin <sashal@kernel.org> wrote:
> >
> > From: Stephen Boyd <swboyd@chromium.org>
> >
> > [ Upstream commit 2e2ee5a2db06c4b81315514b01d06fe5644342e9 ]
> >
> > On some platforms, the TPM power is managed by firmware and therefore we
> > don't need to stop the TPM on suspend when going to a light version of
> > suspend such as S0ix ("freeze" suspend state). Add a chip flag,
> > TPM_CHIP_FLAG_FIRMWARE_POWER_MANAGED, to indicate this so that certain
> > platforms can probe for the usage of this light suspend and avoid
> > touching the TPM state across suspend/resume.
> >
>
> Are the patches needed to support CR50 (which need this patch) going
> to be applied to v5.4.y as well ? If not, what is the purpose of
> applying this patch to v5.4.y ?
>
> Thanks,
> Guenter

Thanks Guenter. I think not.

/Jarkko