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

[Viresh Kumar <viresh.kumar@linaro.org>]

On 24-03-17, 10:44, Rob Herring wrote:
> On Mon, Mar 20, 2017 at 03:02:13PM +0530, Viresh Kumar wrote:
> > Power-domains need to express their active states in DT and what's
> > better than OPP table for that.
> > 
> > This patch allows power-domains to reuse OPP tables to express their
> > active states. The "opp-hz" property isn't a required property anymore
> > as power-domains may not always use them.
> 
> Then maybe you shouldn't be trying to make OPP table work here. At that 
> point you just need a table of voltage(s) per performance state?

Because that's what Kevin strongly recommended in the previous
versions.

@Kevin: Would you like to reply here ?

> > Add a new property "domain-performance-state", which will contain
> > positive integer values to represent performance levels of the
> > power-domains as described in this patch.
> 
> Why not reference the OPP entries from the domain:
> 
> performance-states = <&opp1>, <&opp2>;

Because that would require additional code in the OPP core to parse
these then. Right now it is quite straight forward with the bindings I
presented.

> Just thinking out loud, not saying that is what you should do. The 
> continual evolution of power (management) domain, idle state, and OPP 
> bindings is getting tiring.

I agree :)

-- 
viresh