linux-kernel - Re: [PATCH] regulator: mc13783: consider Power Gates as digital regulators.

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Date:	Tue, 19 Jan 2010 12:12:30 +0100
From:	Alberto Panizzo <maramaopercheseimorto@...il.com>
To:	Liam Girdwood <lrg@...mlogic.co.uk>
Cc:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Sascha linux-arm <s.hauer@...gutronix.de>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-arm-kernel-infradead <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] regulator: mc13783: consider Power Gates as digital
 regulators.

On mar, 2010-01-19 at 10:26 +0000, Liam Girdwood wrote:
> > +static struct regulator_ops mc13783_gpo_regulator_ops = {
> > +     .enable = mc13783_gpo_regulator_enable,
> > +     .disable = mc13783_gpo_regulator_disable,
> > +     .is_enabled = mc13783_gpo_regulator_is_enabled,
> 
> How is the voltage output on the GPO regulator governed. Is it
> controlled by a parent regulator or fixed ?
> 
> We probably want a way to query the voltage here or specify the parent
> relationship. 

Good question.
>>From datasheet GPO's are marked as LV (Low Voltage)-> 3.1V
Power Gates Driver are marked as EMV (Extended Medium Voltage) -> 5.5V

and no way to modify that -> they are fixed regulators.

I will add voltage query capability.

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