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

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Message-ID: <20180530161311.GT6920@sirena.org.uk>
Date:   Wed, 30 May 2018 17:13:11 +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 09:09:02AM -0700, Doug Anderson wrote:
> On Wed, May 30, 2018 at 9:07 AM, Mark Brown <broonie@...nel.org> wrote:

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

> The regulator driver has its own cache of what voltage was most
> recently requested by Linux.  It can use that, can't it?

If we're just going to use the most recently set voltage then hopefully
the hardware already knew that, and it might not be the lowest available
voltage if the last consumer to get turned off was holding the voltage
higher.

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