linux-kernel - RE: [PATCH 3/7] leds-lm3530: add 'is_vin_always_on' in the lm3530_platform

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Message-ID: <B567DBAB974C0544994013492B949F8E3812CD3E47@EXMAIL03.scwf.nsc.com>
Date:	Tue, 24 Jan 2012 17:57:35 -0800
From:	"Kim, Milo" <Milo.Kim@...com>
To:	"Mark Brown" <broonie@...nsource.wolfsonmicro.com>,
	"Linus Walleij" <linus.walleij@...aro.org>
cc:	"shreshthakumar.sahu@...ricsson.com" 
	<shreshthakumar.sahu@...ricsson.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"rpurdie@...ys.net" <rpurdie@...ys.net>
Subject: RE: [PATCH 3/7] leds-lm3530: add 'is_vin_always_on' in the
 lm3530_platform_data

OK, I see. I'll try to follow design patterns for the regulator.
Thanks a lot for your comment.

Best Regards,
Milo -


-----Original Message-----
From: Mark Brown [mailto:broonie@...nsource.wolfsonmicro.com] 
Sent: Tuesday, January 24, 2012 4:31 AM
To: Linus Walleij
Cc: Kim, Milo; shreshthakumar.sahu@...ricsson.com; linux-kernel@...r.kernel.org; rpurdie@...ys.net
Subject: Re: [PATCH 3/7] leds-lm3530: add 'is_vin_always_on' in the lm3530_platform_data

On Mon, Jan 23, 2012 at 08:13:18PM +0100, Linus Walleij wrote:

> As far as I know we want to get rid of different design patterns
> avoiding the regulator interface. The way forward for this is
> either:

> (A) Provide a fixed voltage regulator in your platform for this
>   device (AFAIK the voltage does not even have to be correct)
> (B) Enable dummy regulators in your platform

> (A) is more elegant.

Yeah, regulator usage should essentially never be conditional at a
driver level unless there's actual optional supplies in the hardware.
The situation has never been any different to that.

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