[alsa-devel] [PATCH] ASoC: wm8994: Add clock bindings to the device tree

Mark Rutland mark.rutland at arm.com
Fri Jul 26 17:54:09 CEST 2013

On Thu, Jul 25, 2013 at 06:56:42PM +0100, Mark Brown wrote:
> On Thu, Jul 25, 2013 at 04:46:27PM +0100, Mark Rutland wrote:
> > Do these two clock inputs exist for all of wm1811, wm8994, and wm8958?
> Yes.
> > If I've read the context correctly, these are optional. Does this mean
> > that if not listed that an OS can assume they are already configured and
> > active? It would be nice to document that.
> The clocks are both optional but even if they were assumed to be present
> they aren't usable without knowing the rate which can vary widely.  It
> is possible that the system may be able to infer their presence and
> rates from other information such as the audio system integration
> compatible string but that's out of scope for this and doesn't seem like
> a particularly good idea to encorage anyway.

Ok, that sounds sensible.


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