Re: [PATCH 1/1] mmc: core: Use regulator_get_voltage() if OCR mask is empty.

[Mark Brown <broonie@kernel.org>]

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On Thu, Aug 14, 2014 at 10:36:18PM -0700, Tim Kryger wrote:
> On Thu, Aug 14, 2014 at 8:19 AM, Mark Brown <broonie@kernel.org> wrote:
> 
> > Right, there's two things going on here.  One is that as you describe we
> > shouldn't be putting constraints in .dtsi files if we don't know they're
> > OK for a given board.  The other thing is that on this particular board
> > it turns out that there's no support for varying the voltages at all so
> > it doesn't make sense to have to specify a range, there's only one value
> > anyway so the software really should be able to figure out that fixed
> > value all by itself.

> If constraints are truly irrelevant when the voltage supplied to
> consumers is fixed, why doesn't regulator_list_voltage honor this
> exemption and skip the voltage filtering that uses (potentially
> unspecified) constraints when output is entirely determined by a
> parent (or grandparent) supply that can't change its voltage?

> It seems odd to make callers be the ones to handle this subtlety.

regulator_list_voltage() tells the consumer what voltages could be set,
regulator_get_voltage() tells the consumer what the voltage currently
is.  These aren't quite the same thing.

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