Re: [PATCH v1 17/30] mmc: sdhci-tegra: Support OPP and core voltage scaling

Viresh Kumar
2020-11-09T05:00:16Z

On 06-11-20, 21:41, Frank Lee wrote:
> On Fri, Nov 6, 2020 at 9:18 PM Dmitry Osipenko <digetx@gmail.com> wrote:
> >
> > 06.11.2020 09:15, Viresh Kumar пишет:
> > > Setting regulators for count as 0 doesn't sound good to me.
> > >
> > > But, I understand that you don't want to have that if (have_regulator)
> > > check, and it is a fair request. What I will instead do is, allow all
> > > dev_pm_opp_put*() API to start accepting a NULL pointer for the OPP
> > > table and fail silently. And so you won't be required to have this
> > > unwanted check. But you will be required to save the pointer returned
> > > back by dev_pm_opp_set_regulators(), which is the right thing to do
> > > anyways.
> >
> > Perhaps even a better variant could be to add a devm versions of the OPP
> > API functions, then drivers won't need to care about storing the
> > opp_table pointer if it's unused by drivers.
>
> I think so. The consumer may not be so concerned about the status of
> these OPP tables.
> If the driver needs to manage the release, it needs to add a pointer
> to their driver global structure.
>
> Maybe it's worth having these devm interfaces for opp.

Sure if there are enough users of this, I am all for it. I was fine
with the patches you sent, just that there were not a lot of users of
it and so I pushed them back. If we find that we have more users of it
now, we can surely get that back.

--
viresh