[alsa-devel] [PATCH v2 2/6] MFD: twl6040: Cache the vibra control registers

Dmitry Torokhov dmitry.torokhov at gmail.com
Tue Oct 11 18:01:42 CEST 2011

On Tue, Oct 11, 2011 at 03:48:24PM +0100, Mark Brown wrote:
> On Fri, Sep 23, 2011 at 09:49:40AM +0300, Peter Ujfalusi wrote:
> > The vibra control register will be used from the ASoC codec driver as well.
> > In order to avoid latency issues caused by I2C read access, cache the two
> > control register within the core driver, so we do not need to reach out
> > to the chip to read it back.
> > 
> > Signed-off-by: Peter Ujfalusi <peter.ujfalusi at ti.com>
> It strikes me that it might be useful to just convert the driver to
> regmap and get cache for everything...
> Anyway, could you please restructure this series to minimize the
> dependency on the input subsystem?  Then we can get the rest of it
> applied.

I'm OK with all patches going through MFD - I do not believe it will
cause any merge issues.

For the record I still do not like returning EBUSY when device is not
available - I think if device can't serve any requests it should not
exists at all.


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