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To: ext Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: "Valentin Eduardo \(Nokia-D\/Helsinki\)" <eduardo.valentin@nokia.com>,
       "De-Schrijver Peter \(Nokia-D\/Helsinki\)" 
	<Peter.De-Schrijver@nokia.com>,
       "Keski-Saari Juha.1 \(EXT-Teleca\/Helsinki\)" 
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       LKML <linux-kernel@vger.kernel.org>,
       "lrg\@slimlogic.co.uk" <lrg@slimlogic.co.uk>
Subject: Re: Doubt about Regulator Framework and VBAT use case
References: <20091130104102.GA16608@esdhcp037198.research.nokia.com>
	<20091130114515.GB10968@rakim.wolfsonmicro.main>
From: jouni.hogander@nokia.com (=?utf-8?Q?H=C3=B6gander?= Jouni)
Date: Wed, 02 Dec 2009 13:32:06 +0200
In-Reply-To: <20091130114515.GB10968@rakim.wolfsonmicro.main> (ext Mark Brown's message of "Mon\, 30 Nov 2009 12\:45\:15 +0100")
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ext Mark Brown <broonie@opensource.wolfsonmicro.com> writes:

> On Mon, Nov 30, 2009 at 12:41:02PM +0200, Eduardo Valentin wrote:
>
>> I'm writing to ask about VBAT use case. What is the expected
>> way to use regulator framework in case of rail coming from battery?
>> Should it be added to the regulator framework at all?
>
> ...
>
>> However, drivers for devices on that rail would require their regulator anyway.
>> And I guess the point would be that drivers should not be aware that they are on VBAT
>> or any other rail.
>
> I'd add it as a fixed voltage regulator and either not specify the
> voltage or specify the nominal voltage.

I was preparing patch for this when I noticed that fixed voltage
regulator can control only one regulator. Are you aware of any ongoing
work to enable control for multiple regulators in
fixed-voltage-regulator?

-- 
Jouni Högander