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

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Message-ID: <20201109053546.xupmmsx5qccn46tr@vireshk-i7>
Date:   Mon, 9 Nov 2020 11:05:46 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Frank Lee <tiny.windzz@...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 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.

> static inline int devm_pm_opp_of_add_table(struct device *dev)
> {
> 	int err;
> 
> 	err = dev_pm_opp_of_add_table(dev);
> 	if (err)
> 		return err;
> 
> 	err = devm_add_action_or_reset(dev, (void*)dev_pm_opp_remove_table,
> 				       dev);
> 	if (err)
> 		return err;
> 
> 	return 0;
> }

-- 
viresh