linux-kernel - Re: [lm-sensors] regulator: regulator_get behaviour without CONFIG

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Message-Id: <1F9C625F-0467-4C6D-B57F-2E4FCAC76031@opensource.wolfsonmicro.com>
Date:	Tue, 6 Apr 2010 19:19:47 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Jonathan Cameron <jic23@....ac.uk>
Cc:	Liam Girdwood <lrg@...mlogic.co.uk>,
	Jean Delvare <khali@...ux-fr.org>,
	lm-sensors <lm-sensors@...sensors.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [lm-sensors] regulator: regulator_get behaviour without CONFIG_REGULATOR set

On 6 Apr 2010, at 17:25, Jonathan Cameron <jic23@....ac.uk> wrote:

> On 04/06/10 16:27, Liam Girdwood wrote:
>>>
>>>
>>>
>>
>> I suppose this is something we may look into more when we have more
>> clients.
> Makes sense.  There will probably be quite a few IIO drivers over  
> the next
> few months doing much the same as sht15, where the voltage ref for  
> devices
> may well be fed by a regulator.  In that case, we may only offer the  
> option
> of using an external v_ref if the regulator is available.  Many  
> devices have
> an internal regulator to provide it so typically we'll start them up  
> using that
> and provide an interface to switch to external regulator if one is  
> available.
> I haven't thought through exactly how this will work as yet. I'll cc  
> people in
> when this comes up.

TBH this seems like a very vanilla use case - there may be some small  
advantage to representing the internal regulator via the regulator API  
but that's about the only thing I can think might be a bit odd.
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