linux-kernel - Re: [PATCH v2 5/7] regulator: max77802: Document regulator opmode DT properties

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Date:	Fri, 17 Oct 2014 16:18:11 +0200
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Mark Brown <broonie@...nel.org>
CC:	Lee Jones <lee.jones@...aro.org>,
	Doug Anderson <dianders@...omium.org>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Olof Johansson <olof@...om.net>,
	Chris Zhong <zyw@...k-chips.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Abhilash Kesavan <kesavan.abhilash@...il.com>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v2 5/7] regulator: max77802: Document regulator opmode
 DT properties

Hello Mark,

On 10/17/2014 03:54 PM, Mark Brown wrote:
> On Fri, Oct 17, 2014 at 02:39:15PM +0200, Javier Martinez Canillas wrote:
> 
>> Just to be sure I understood correctly, are you suggesting something like this?
> 
>> 	ldo1_reg: LDO1 {
>> 		regulator-name = "vdd_1v0";
>> 		regulator-min-microvolt = <1000000>;
>> 		regulator-max-microvolt = <1000000>;
>> 		regulator-state-mem {
>> 			regulator-on-in-suspend;
>> 			regulator-mode = <MAX77802_OPMODE_LP>;
>> 		};
>> 	};
> 
>> In other words, extending Chanwoo Choi's original suspend state binding to add
>> the regulator-mode property that was present in his v3 [0] but instead trying
>> to use the standard REGULATOR_MODE_*, say that each regulator driver should
>> define it's own device-specific set of modes and a do the translation to fill
>> standard modes in the struct regulation_constraints {initial,disk,mem} mode?
> 
>> That way adding new suspend states, will only require changing the generic
>> regulator binding but not the regulator driver specific bindings.
> 
> Something like that, yes.  Not sure if numbers or strings are the best

Perfect will re-spin then, many thanks again for your feedback and suggestions.

> way of doing the mode but it probably doesn't matter too much now we
> have preprocessor support for inclue files.
> 

I usually prefer to avoid strings when possible since a typo can't be
detected when building the DTB and could be hard to debug at runtime while
a typo on a macro will be detected by the preprocessor at build time.

But I don't have a strong opinion either.

Best regards,
Javier
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