linux-kernel - Re: [PATCH 2/2] regulator: core: Error on not always

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Date:	Tue, 25 Feb 2014 21:26:44 +0900
From:	Mark Brown <broonie@...nel.org>
To:	Markus Pargmann <mpa@...gutronix.de>
Cc:	Liam Girdwood <lgirdwood@...il.com>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, kernel@...gutronix.de
Subject: Re: [PATCH 2/2] regulator: core: Error on not always_on dummy
 regulators

On Tue, Feb 25, 2014 at 11:03:47AM +0100, Markus Pargmann wrote:
> It does not make sense to have dummy/fixed regulators that are not
> always_on. This patch adds a check in the set_machine_constraints
> function for this case and returns -EINVAL if such a regulator is
> registered.

Such a regulator isn't going to be useful in a system but that doesn't
mean that they shouldn't be registerable since that allows people to
look at their state.  For example a device might have some GPIO managed
regulators where the GPIO is tied low if the regulator isn't in use in
the system.

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