Re: [PATCH V4 1/9] PM / OPP: Allow OPP table to be used for power-domains

From: Viresh Kumar
Date: Wed Apr 19 2017 - 07:48:05 EST


On 18-04-17, 17:01, Sudeep Holla wrote:
> Understood. I would incline towards reusing regulators we that's what is

It can be just a regulator, but it can be anything else as well. That
entity may have its own clock/volt/current tunables, etc.

> changed behind the scene. Calling this operating performance point
> is misleading and doesn't align well with existing specs/features.

Yeah, but there are no voltage levels available here and that doesn't
fit as a regulator then.

> Understood. We have exactly same thing with SCPI but it controls both
> frequency and voltage referred as operating points. In general, this OPP
> terminology is used in SCPI/ACPI/SCMI specifications as both frequency
> and voltage control. I am bit worried that this binding might introduce
> confusions on the definitions. But it can be reworded/renamed easily if
> required.

Yeah, so far we have been looking at OPPs as freq-voltage pairs ONLY
and that is changing. I am not sure if it going in the wrong
direction really. Without frequency also it is an operating point for
the domain. Isn't it?

--
viresh