Re: [PATCH v2 4/4] PM: domains: Drop/restore performance state votes for devices at system PM

Ulf Hansson
2021-06-08T14:40:01Z

On Tue, 8 Jun 2021 at 16:20, Mark Brown <broonie@kernel.org> wrote:
>
> On Tue, Jun 08, 2021 at 04:08:55PM +0200, Ulf Hansson wrote:
>
> > Honestly, I am not sure about what the regulator-fixed-domain intends
> > to model, but I assume it's something that fits well to be modelled as
> > a plain regulator, to start with.
>
> > Perhaps Mark can chime in and spread some light over this?
>
> IIRC it's for situations where there's a device that's normally built as
> a separate chip that got built into a bigger SoC and wants to rear end
> something onto a power domain, I guess especially if the power domain
> doesn't cover the whole of a Linux device.

Alright, thanks for explaining!

Certainly something that should not be mixed up with a regular power
rail for shared resources (aka power-domain). Maybe it's worth trying
to extend the description in the DT binding a bit, so it doesn't get
abused?

Kind regards
Uffe