[alsa-devel] [PATCH 7/9] ASoC: da7210: Add support for ALC and Noise suppression

Mark Brown broonie at opensource.wolfsonmicro.com
Thu Oct 13 12:26:03 CEST 2011

On Thu, Oct 13, 2011 at 02:45:45PM +0530, Ashish Chavan wrote:
> On Wed, 2011-10-12 at 16:04 +0100, Mark Brown wrote:

> > No, don't go peering directly into the register cache.  This is going to
> > explode if the board configures a different cache style and means you
> > can't change the cache type later.  Just read the register and trust
> > that the cache will do something sane.

> Will update the code to directly read the register. I thought of saving
> some io bandwidth and if I remember correctly, I saw few exiting drivers
> doing this.

The whole point of having the register cache is that reads don't result
in any actual I/O, if there's any I/O happening we need to fix the
register cache code.

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