On Mon, Mar 17, 2014 at 05:45:40PM +0800, Bo Shen wrote:

>    - compatible: "atmel,asoc-wm8904"
>    - atmel,model: The user-visible name of this sound complex.
> +  - clocks: A list of clocks needed by the wm8904 chip.
> +  - clock-output-names: Driver related clock names. Shall contain "pck0".

If this is a clock for the CODEC it should be documented as part of the
binding for the CODEC and connected to the CODEC in the device tree
rather than being part of a machine driver binding.