linux-kernel - Re: [PATCH 4/6] regulator: lp872x: Add enable GPIO pin support

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Date:	Tue, 29 Dec 2015 15:55:45 -0600
From:	Rob Herring <robh@...nel.org>
To:	Paul Kocialkowski <contact@...lk.fr>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Mark Rutland <mark.rutland@....com>,
	Milo Kim <milo.kim@...com>,
	Russell King <linux@....linux.org.uk>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Tony Lindgren <tony@...mide.com>,
	Mark Brown <broonie@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Benoît Cousson <bcousson@...libre.com>,
	Kumar Gala <galak@...eaurora.org>,
	linux-omap <linux-omap@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 4/6] regulator: lp872x: Add enable GPIO pin support

On Tue, Dec 29, 2015 at 3:26 PM, Paul Kocialkowski <contact@...lk.fr> wrote:
> Le mardi 29 décembre 2015 à 14:02 -0600, Rob Herring a écrit :
>> On Wed, Dec 23, 2015 at 11:58:37AM +0100, Paul Kocialkowski wrote:
>> > LP872x regulators are made active via the EN pin, which might be hooked to a
>> > GPIO. This adds support for driving the GPIO high when the driver is in use.
>> >
>> > Signed-off-by: Paul Kocialkowski <contact@...lk.fr>
>> > ---
>> >  .../devicetree/bindings/regulator/lp872x.txt       |  1 +
>> >  drivers/regulator/lp872x.c                         | 33 ++++++++++++++++++++--
>> >  include/linux/regulator/lp872x.h                   |  2 ++
>> >  3 files changed, 33 insertions(+), 3 deletions(-)
>> >
>> > diff --git a/Documentation/devicetree/bindings/regulator/lp872x.txt b/Documentation/devicetree/bindings/regulator/lp872x.txt
>> > index 7818318..0559c25 100644
>> > --- a/Documentation/devicetree/bindings/regulator/lp872x.txt
>> > +++ b/Documentation/devicetree/bindings/regulator/lp872x.txt
>> > @@ -28,6 +28,7 @@ Optional properties:
>> >    - ti,dvs-gpio: GPIO specifier for external DVS pin control of LP872x devices.
>> >    - ti,dvs-vsel: DVS selector. 0 = SEL_V1, 1 = SEL_V2.
>> >    - ti,dvs-state: initial DVS pin state. 0 = DVS_LOW, 1 = DVS_HIGH.
>> > +  - ti,enable-gpio: GPIO specifier for EN pin control of LP872x devices.
>>
>> Should be "-gpios" instead of "-gpio".
>
> Care to comment why? There is only one GPIO that can be used here, since
> there is only one single EN pin. I thought this matched what is done
> already with "ti,dvs-gpio".

To be consistent. We use "clocks" and "interrupts" always whether one
or more for example.

-gpio is documented as deprecated now.

Rob
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