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

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Date:   Mon, 9 Nov 2020 19:20:50 +0800
From:   Frank Lee <tiny.windzz@...il.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Peter Chen <Peter.Chen@....com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lee Jones <lee.jones@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        driver-dev <devel@...verdev.osuosl.org>,
        linux-pwm@...r.kernel.org,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>, linux-usb@...r.kernel.org,
        "open list:SECURE DIGITAL HO..." <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-tegra@...r.kernel.org, linux-media@...r.kernel.org
Subject: Re: [PATCH v1 17/30] mmc: sdhci-tegra: Support OPP and core voltage scaling

On Mon, Nov 9, 2020 at 1:53 PM Viresh Kumar <viresh.kumar@...aro.org> wrote:
>
> On 09-11-20, 08:44, Dmitry Osipenko wrote:
> > 09.11.2020 08:35, Viresh Kumar пишет:
> > > On 09-11-20, 08:19, Dmitry Osipenko wrote:
> > >> Thanks, I made it in a different way by simply adding helpers to the
> > >> pm_opp.h which use devm_add_action_or_reset(). This doesn't require to
> > >> add new kernel symbols.
> > >
> > > I will prefer to add it in core.c itself, and yes
> > > devm_add_action_or_reset() looks better. But I am still not sure for
> > > which helpers do we need the devm_*() variants, as this is only useful
> > > for non-CPU devices. But if we have users that we can add right now,
> > > why not.
> >
> > All current non-CPU drivers (devfreq, mmc, memory, etc) can benefit from it.
> >
> > For Tegra drivers we need these variants:
> >
> > devm_pm_opp_set_supported_hw()
> > devm_pm_opp_set_regulators() [if we won't use GENPD]
> > devm_pm_opp_set_clkname()
> > devm_pm_opp_of_add_table()
>
> I tried to look earlier for the stuff already merged in and didn't
> find a lot of stuff where the devm_* could be used, maybe I missed
> some of it.
>
> Frank, would you like to refresh your series based on suggestions from
> Dmitry and make other drivers adapt to the new APIs ?

I am glad to do this.：）

Yangtao