linux-kernel - Re: [PATCH V2 6/6] regulator: max77620: add regulator driver for max77620/max20024

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Message-ID: <56964CEF.3030900@nvidia.com>
Date:	Wed, 13 Jan 2016 18:41:11 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Mark Brown <broonie@...nel.org>
CC:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<linus.walleij@...aro.org>, <gnurou@...il.com>,
	<lee.jones@...aro.org>, <a.zummo@...ertech.it>,
	<alexandre.belloni@...e-electrons.com>, <lgirdwood@...il.com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-gpio@...r.kernel.org>, <rtc-linux@...glegroups.com>,
	<swarren@...dia.com>, <treding@...dia.com>,
	Mallikarjun Kasoju <mkasoju@...dia.com>
Subject: Re: [PATCH V2 6/6] regulator: max77620: add regulator driver for
 max77620/max20024


On Wednesday 13 January 2016 06:39 PM, Mark Brown wrote:
> * PGP Signed by an unknown key
>
> On Wed, Jan 13, 2016 at 06:07:51PM +0530, Laxman Dewangan wrote:
>> On Wednesday 13 January 2016 06:01 PM, Mark Brown wrote:
>>> What is FPS_SRC and why is it set from init_data?  A driver should never
>>> be looking at init_data.
>> When FPS_SRC is set to NONE (this is needed from platform data) then based
>> on constraint like boot enable/always enable, it need to be on desired
>> state. Otherwise we may endup with disabling the rail when setting to NONE
>> and create issue.
> What is "it" and why can't we check what the current configuration is
> while setting FPS to NONE?
I will have platform specific data in callback of enable/disable only.
Which call back do I need to set this? enable/disable or post register?

>> I need to set the FPS src properly for each rails before callback happen
>> from regulator init so that enable/disable/is_enable can handle it properly.
> Why not just reorder the callback so it happens before the constraints
> are applied?
>
which callback I need to reorder for getting the context for configruation?