Re: [PATCH v2 3/4] cpufreq: mediatek: add Mediatek cpufreq driver

From: Viresh Kumar
Date: Mon Mar 09 2015 - 22:50:52 EST

On 6 March 2015 at 11:19, Pi-Cheng Chen <pi-cheng.chen@xxxxxxxxxx> wrote:
> On 5 March 2015 at 17:55, Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote:

> About putting
> those stuff into regulator driver, I think you mean creating a
> "virtual regulator
> device" and put all the voltage controlling complex into the driver, right?
> Maybe it's a good idea in this case, but I am sure if this kind of
> virtual regulator is acceptable.

@Mark: Is this allowed to create virtual regulator for a CPU ?

> And the flexibility might be an issue, since we might
> use different
> PMIC for same SoC on different board.

We can talk about that separately once Mark replies to my query.

> Combining comments and suggestions from you and Sascha[1], I conclude some
> architectural changes are going to be made in the next version:
> 1. Use set_rate hook instead of determine_rate in clk driver, and
> switch to intermeidate
> PLL parent and back to original CPU PLL parent explicitly in set_rate

Lets wait for Russell's answer to the query I posted before making any
progress here.
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