linux-kernel - Re: [PATCH 7/8] mfd/regulator: dt-bindings: max77686: Document gpio property

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Date:	Mon, 27 Oct 2014 21:15:16 +0100
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
	Ben Dooks <ben-linux@...ff.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org
CC:	Kyungmin Park <kyungmin.park@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>
Subject: Re: [PATCH 7/8] mfd/regulator: dt-bindings: max77686: Document gpio
 property

Hello Krzysztof,

On 10/27/2014 04:03 PM, Krzysztof Kozlowski wrote:
> Document usage of gpio property which turns on external control over
> regulator.
> 
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> ---
>  Documentation/devicetree/bindings/mfd/max77686.txt | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/max77686.txt b/Documentation/devicetree/bindings/mfd/max77686.txt
> index 75fdfaf41831..e41dfa7e2b90 100644
> --- a/Documentation/devicetree/bindings/mfd/max77686.txt
> +++ b/Documentation/devicetree/bindings/mfd/max77686.txt
> @@ -39,6 +39,9 @@ to get matched with their hardware counterparts as follow:
>  	-BUCKn	:	1-4.
>    Use standard regulator bindings for it ('regulator-off-in-suspend').
>  
> +  Optional properties:
> +  - gpio : GPIO to use for external control. Valid only for LDO20, LDO21,
> +    LDO22, BUCK8 and BUCK9 regulators.

When using the descriptor-based GPIO interface the standard is to use as the DT
property name a prefix documenting the GPIO function + a -gpios or -gpio suffix.
So this should be something like ec-gpio.

Best regards,
Javier

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