[alsa-devel] [PATCH v4 2/5] ASoC: Move standard kcontrol helpers to the component level

Mark Brown broonie at kernel.org
Mon May 12 13:03:04 CEST 2014

On Mon, May 12, 2014 at 11:42:04AM +0100, Charles Keepax wrote:

> > Yea, you're right.  When the error message shows up, _regmap_read()
> > returns -EBUSY for reg WM8962_CLASS_D_CONTROL_1.  But how do I find out
> > why the reg is not in the cache?

> From what I can see it doesn't look like this register should be
> volatile. I am checking with the hardware guys here, incase I am
> missing something, but otherwise I will wing out a patch to make
> it non-volatile.

IIRC at least one of the bits in the register also appears in another
register.  They aren't volatile but the cache could get confused unless
something is open coded to keep the two cached registers in sync.
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