[alsa-devel] [PATCH 1/4] mfd: arizona: Export function to control subsystem DVFS

[Mark Brown]

On Mon, Jun 16, 2014 at 05:42:42PM +0100, Lee Jones wrote:
> On Mon, 09 Jun 2014, Richard Fitzgerald wrote:

> > +	if (arizona->subsys_max_rq != new_flags) {

> I don't really get this.  What's the point in passing the mask
> parameter - I don't see it being used for anything in this routine? No
> matter what is passed in you always just turn on the same regulator.

> What am I missing?

AFAICT it's a bunch of different independently selectable requests for
the voltage to ramped with any one of them causing it to happen.

I did wonder why this wasn't just done by refcounting, that's the more
normal pattern in the kernel, though I guess it's possible some of them
need different ramps on different devices.
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