Re: [PATCH v2 1/3] hwmon: (lm90) Add power control

From: Mark Brown
Date: Fri Aug 09 2013 - 06:57:33 EST

On Fri, Aug 09, 2013 at 03:23:31PM +0800, Wei Ni wrote:
> On 08/08/2013 07:01 PM, Mark Brown wrote:

> > You shouldn't just be ignoring errors here, though there are deployment
> > difficulties with making sure a stub regulator is provided. These
> > should be getting easier after the next merge window, the stubs will be
> > being tweaked slightly to have an "assume it's there" option even when

> Oh, really, could you show me the patch, I wish to take a look :)

No patch quite yet - the basic idea is that for plain regulator_get()
you'll only ever get -EPROBE_DEFER as an error, not -ENODEV. If the
regulator is missing in the DT we assume it's there and provide a dummy
if the DT doesn't hook it up. If the consumer genuinely wants to see if
a supply might not be wired up it should use regulator_get_optional()
which is in -next at the minute.

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