linux-kernel - Re: [PATCH] regulator: Ensure voltages are within the allowed range

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Message-ID: <20141112144837.GI3815@sirena.org.uk>
Date:	Wed, 12 Nov 2014 14:48:37 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	Allen Martin <amartin@...dia.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] regulator: Ensure voltages are within the allowed range

On Wed, Nov 12, 2014 at 01:02:04PM +0100, Thierry Reding wrote:

> Perhaps rather than checking that the voltage is within the valid range
> we could at least cover the case where voltage is zero, which is what
> triggered me to write this patch.

Anything which has a voltage of zero is buggy anyway, zero volts is the
off state and should show up as such.  If we don't have a voltage then
the enable should fail.

> Do you have any recommendations to work around this other than adjusting
> the actual voltage to be within the range?

Such regulators need a way of providing a bootsrapping voltage if
they're off when we start I think.

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