linux-kernel - Re: [PATCH v3 1/2] regulator: dt-bindings: add QCOM RPMh regulator bindings

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Message-ID: <20180530160744.GS6920@sirena.org.uk>
Date:   Wed, 30 May 2018 17:07:44 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Doug Anderson <dianders@...omium.org>
Cc:     David Collins <collinsd@...eaurora.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-msm@...r.kernel.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        devicetree@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Stephen Boyd <sboyd@...nel.org>
Subject: Re: [PATCH v3 1/2] regulator: dt-bindings: add QCOM RPMh regulator
 bindings

On Wed, May 30, 2018 at 09:06:16AM -0700, Doug Anderson wrote:
> On Wed, May 30, 2018 at 8:48 AM, Mark Brown <broonie@...nel.org> wrote:

> > Without the core doing something the regulator isn't going to get told
> > that anything updated voltages anyway...

> I was just suggesting that when the core tells the regulator driver to
> disable itself that the regulator driver tell RPMh to not only disable
> itself but also (temporarily) vote for a lower voltage.  When the core
> tells the regulator to re-enable itself then the regulator driver
> restores the original voltage vote (or applies any vote that might
> have been attempted while the regulator was disabled).  That wouldn't
> require any regulator core changes.

It needs something to tell it what the new voltage to set is.

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