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

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