linux-kernel - Re: [RFC 3/5] regulator: core: Only apply constraints if available on list voltage

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Message-ID: <20140730104253.GP17528@sirena.org.uk>
Date:	Wed, 30 Jul 2014 11:42:53 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	Kukjin Kim <kgene.kim@...sung.com>,
	Doug Anderson <dianders@...omium.org>,
	Olof Johansson <olof@...om.net>,
	Yuvaraj Kumar C D <yuvaraj.cd@...il.com>,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC 3/5] regulator: core: Only apply constraints if available
 on list voltage

On Wed, Jul 30, 2014 at 10:49:25AM +0200, Javier Martinez Canillas wrote:
> On 07/29/2014 07:18 PM, Mark Brown wrote:

> > I would also expect any regulator where the supplied devices are able to
> > vary the voltage to explicitly provide a constraint even if the
> > implementation is done in a parent regulator.  There may be constraints
> > on the child supply which aren't directly present on the parent supply
> > and can be ignored if the child supply is turned off.

> Agreed, if I explicitly set the voltage constraints on the child supply then
> this patch is indeed not needed.

We will, however, need some code to pass the child supply constraints on
to the parent.

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