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Re: [PATCH 2/2] regulator: add documentation for ACT8945A's regulator DT bindings

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  Re: [PATCH 2/2] regulator: add documentation for ACT8945A's  regulator DT bindings Mark Brown <broonie@kernel.org> - 2016-01-15 19:00 +0100
    RE: [PATCH 2/2] regulator: add documentation for ACT8945A's  regulator DT bindings "Yang, Wenyou" <Wenyou.Yang@atmel.com> - 2016-01-18 02:40 +0100

#1310334 — Re: [PATCH 2/2] regulator: add documentation for ACT8945A's regulator DT bindings

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On Fri, Jan 08, 2016 at 10:08:58AM +0800, Wenyou Yang wrote:

> +Optional properties:
> +- active-semi,vsel-high: Indicates if the VSEL pin is set to logic-high.
> +  If this property is missing, assume the VSEL pin is set to logic-low.

Wouldn't such a pin normally be connected to a GPIO for runtime control
- why is it expected to be tied statically all the time?

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#1311215

Hi Mark,

> -----Original Message-----
> From: Mark Brown [mailto:broonie@kernel.org]
> Sent: 2016年1月16日 1:59
> To: Yang, Wenyou <Wenyou.Yang@atmel.com>
> Cc: Liam Girdwood <lgirdwood@gmail.com>; Rob Herring <robh+dt@kernel.org>;
> Pawel Moll <pawel.moll@arm.com>; Mark Rutland <mark.rutland@arm.com>; Ian
> Campbell <ijc+devicetree@hellion.org.uk>; Kumar Gala <galak@codeaurora.org>;
> Ferre, Nicolas <Nicolas.FERRE@atmel.com>; linux-arm-
> kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> devicetree@vger.kernel.org
> Subject: Re: [PATCH 2/2] regulator: add documentation for ACT8945A's regulator
> DT bindings
> 
> On Fri, Jan 08, 2016 at 10:08:58AM +0800, Wenyou Yang wrote:
> 
> > +Optional properties:
> > +- active-semi,vsel-high: Indicates if the VSEL pin is set to logic-high.
> > +  If this property is missing, assume the VSEL pin is set to logic-low.
> 
> Wouldn't such a pin normally be connected to a GPIO for runtime control
> - why is it expected to be tied statically all the time?

On the reference board, it is connected to the VSYS_5V statically.

Yes, it should be connected to a GPIO, it should be controllable at the necessary time.


Best Regards,
Wenyou Yang 

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