linux-kernel - Re: [PATCH v2 07/10] regulator: Add driver for Maxim 77802 PMIC regulators

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Message-ID: <53A9AAA1.4030005@collabora.co.uk>
Date:	Tue, 24 Jun 2014 18:43:13 +0200
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Mark Brown <broonie@...nel.org>
CC:	Lee Jones <lee.jones@...aro.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Mike Turquette <mturquette@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Doug Anderson <dianders@...omium.org>,
	Olof Johansson <olof@...om.net>,
	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	Daniel Stone <daniels@...labora.com>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 07/10] regulator: Add driver for Maxim 77802 PMIC regulators

Hello Mark,

On 06/23/2014 11:47 AM, Mark Brown wrote:
> On Mon, Jun 23, 2014 at 11:28:25AM +0200, Javier Martinez Canillas wrote:
>> On 06/21/2014 10:40 PM, Mark Brown wrote:
> 
>> > That's not really relevant here - I'm asking if the regulators get their
>> > own supplies rather than if anything uses them.
> 
>> Sorry if I keep misunderstanding your question but the regulators in this PMIC
>> don't have a parent supply/regulator node.
> 
> They should, I'm pretty sure the device does actually regulate one
> supply into another.
> 

Thanks a lot for the clarification. This was not evident to me when I read the
PMIC datasheet and because both the max77xxx Chrome OS 3.8 and mainline max77686
drivers used a simplistic model of the power scheme.

But Doug confirmed to me that some regulators on this PMIC do indeed use others
regulators as a power supply so I'll change this in the next version of the
patch-set.

Best regards,
Javier
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