linux-kernel - Re: [PATCH V1 3/3] regulator: slg51000: add slg51000 regulator driver

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Date:   Wed, 17 Apr 2019 16:49:05 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Eric Hyeung Dong Jeong <eric.jeong.opensource@...semi.com>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        DEVICETREE <devicetree@...r.kernel.org>,
        LINUX-KERNEL <linux-kernel@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>,
        Support Opensource <Support.Opensource@...semi.com>
Subject: Re: [PATCH V1 3/3] regulator: slg51000: add slg51000 regulator driver

On Wed, Apr 17, 2019 at 11:25:29AM +0000, Eric Hyeung Dong Jeong wrote:
> On Wednesday, April 17, 2019 12:25 AM +0900, Mark Brown wrote:

> > This looks like it should be a get_status() operation as it's reading
> > status bits rather than the command we sent to the device - for that
> > just use regulator_is_enabled_regmap().

> I thought that it needs to return current status of a regulator when the function is called.
> I am wondering that the *is_enabled()* function is just to check 
> If a regulator has been turned on or not rather than getting current status of the regulator.

It should say if we told the hardware to enable the regulator so the
former - basically, is the hardware in the same state it'd be in after
we called _enable() or _disable().  If there's a fault then that should
only affect is_enabled() if it resets the enable bit that _enable() set.

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