Re: [PATCH v4] dt-bindings: dvfs: Add support for generic performance domains

[Viresh Kumar]

On 19-10-21, 15:58, Ulf Hansson wrote:
> To me, this looks doable from a genpd provider too. Of course, we may
> need to extend the genpd interface a bit to make it fit well for this
> new use case, of course. And I am happy to help, if that is needed.
> 
> One thing though; how is the aggregation of the OPP votes expected to
> be done? Is that entirely managed by FW - or is it expected that the
> cpufreq driver, in this case, keeps track of the aggregated votes too?

In case of cpufreq drivers, the voting is never required since there
is always a single request from cpufreq core to change the freq for a
group of devices (CPUs). And these genpds will only have a bunch of
CPUs to serve.

> Don't get me wrong, I am not pushing for these DT bindings to be
> deprecated (at least not yet :-)), but I would certainly like to
> understand more about them. In the end, we haven't walked this far, by
> extending genpd and inventing new DT bindings to enable it to support
> "performance management" - then just to just forget about them again.
> :-)

I am happy to move to genpd if this can be done in a sane way there :)

-- 
viresh