linux-kernel - Re: [PATCHv2] Regulator: Add Anatop regulator driver

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Date:	Sat, 24 Dec 2011 12:37:13 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	"Ying-Chun Liu (PaulLiu)" <paul.liu@...aro.org>
Cc:	linaro-dev@...ts.linaro.org, patches@...aro.org,
	linux-kernel@...r.kernel.org, eric.miao@...aro.org,
	Nancy Chen <Nancy.Chen@...escale.com>,
	Liam Girdwood <lrg@...com>
Subject: Re: [PATCHv2] Regulator: Add Anatop regulator driver

On Thu, Dec 22, 2011 at 11:33:38AM +0000, Mark Brown wrote:
> On Wed, Dec 21, 2011 at 05:03:31PM +0800, Ying-Chun Liu (PaulLiu) wrote:

> > +	if (anatop_reg->rdata->control_reg) {
> > +		val = anatop_reg->rdata->min_bit_val +
> > +			(uv - reg->constraints->min_uV) / 25000;

> You're not checking that the resulting voltage matches the constraints
> or updating selector.

Also on re-reading this looks *very* broken - you're using the
constraints value in your set_voltage() operation.  The runtime
constraints a system has should have *no* impact on the way you ask for
a specific voltage from the regulator.
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