Re: [alsa-devel] [PATCH v3 3/5] ASoC: tda998x: add DT documentation of the tda998x CODEC

On Tue, 4 Feb 2014 18:12:13 +0000 Mark Brown broonie@kernel.org wrote:

On Sat, Feb 01, 2014 at 05:48:49PM +0100, Jean-Francois Moine wrote:

...

• • compatible: must be "nxp,tda998x-codec".

It's not clear to me why there's a separate compatible here - as far as I can see this can only appear as part of one of these devices and there's no addressing or other information that'd account for chip variation so I'd not expect to need to bind this independently of the parent.

If there is no 'compatible', the CODEC module is not loaded, and, when the module is in the core, no CODEC device can be created from the DT.