linux-kernel - Re: [PATCH] regulator: core: Skip balancing of the enabled regulators in regulator

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Date:   Tue, 8 Oct 2019 13:47:36 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     linux-kernel@...r.kernel.org, Dmitry Osipenko <digetx@...il.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-samsung-soc@...r.kernel.org,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Kamil Konieczny <k.konieczny@...sung.com>
Subject: Re: [PATCH] regulator: core: Skip balancing of the enabled
 regulators in regulator_enable()

On Tue, Oct 08, 2019 at 02:38:55PM +0200, Marek Szyprowski wrote:

> Then if I get it right, the issue is caused by the commit 7f93ff73f7c8 
> ("opp: core: add regulators enable and disable"). I've checked and 
> indeed reverting it fixes Peach Pi to boot properly. The question is if 
> this is desired behavior or not?

That doesn't seem ideal - either it's redundant for regulators that need
to be marked as always-on anyway or it's going to force the regulators
on when a device could do runtime PM (eg, if the same code can run on
something like a GPU which can be turned off while the screen is off or
is displaying a static image).

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