[alsa-devel] [PATCH v4] ASoC: simple-card: add Device Tree support

[Rob Herring]

On Mon, Nov 18, 2013 at 8:36 PM, Kuninori Morimoto
<kuninori.morimoto.gx at renesas.com> wrote:
>
> Hi Rob, Mark
>
>> >> +Required properties:
>> >> +
>> >> +- compatible                         : "simple-audio"
>>
>> Still not really a fan of this generic name. Can we define in the
>> description above what simple means.
>
> So, how about "simple-audio-card" ?

That's missing my point. First, I think you should be defining the
actual h/w in the DT and doing the mapping of that to a simple audio
driver in the kernel. Otherwise how do you fix some quirk on a
particular platform later on without updating the DTB? I'm fine with
this being the default compatible string, but you should also require
a more specific name. Perhaps it is just <soc>-simple-audio or
<board>-simple-audio.

Second, you need to define in this binding document what simple means.
What properties of the audio subsystem make it simple? The h/w has and
doesn't have what? How do I decide if my platform can or should use
this binding?

Rob