[alsa-devel] [PATCH 07/21] ASoC: io: Prevent use of regmap if request fails

Mark Brown broonie at opensource.wolfsonmicro.com
Thu Jul 26 22:23:11 CEST 2012

On Thu, Jul 26, 2012 at 05:05:51PM +0100, Lee Jones wrote:
> On 26/07/12 16:25, Mark Brown wrote:

> >You're supposed to use it for the data you use to call back into the
> >underlying I/O code.

> I don't understand. What 'data'?

Whatever your I/O layer so desires, the core doesn't care.  It's
generally whatever the lower layer that does your I/O takes to identify
the device.

> Surely if .read and .write are populated in 'struct
> snd_soc_codec_driver', then it should just call back into those?

Yes, and in fact that's what we do!
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