[PATCH 1/3] ASoC: Add device tree binding for WM8770

[Mark Brown]

On Tue, Aug 30, 2011 at 01:15:07PM -0500, Timur Tabi wrote:

>  Note that I require a clock-frequency property to indicate the input clock
> frequency on the codec itself.

It's listed as optional in the binding (and would in general need to
be).