Re: [PATCH v2 3/8] ASoC: davinci-evm: HDMI audio support for TDA998x trough McASP I2S bus

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On Mon, Aug 18, 2014 at 10:46:41PM +0100, Jyri Sarha wrote:
> Add machine driver support for BeagleBone-Black HDMI audio. BBB has
> NXP TDA998X HDMI transmitter connected to McASP port in I2S mode. The
> 44100 Hz sample-rate and it's multiples can not be accurately produced
> on BBB. The only supported sample format is SNDRV_PCM_FORMAT_S32_LE.
> The 8 least significant bits are ignored.
> 
> Signed-off-by: Jyri Sarha <jsarha@xxxxxx>
> ---
>  .../bindings/sound/davinci-evm-audio.txt           |    4 +-
>  sound/soc/davinci/davinci-evm.c                    |   82 +++++++++++++++++++-
>  2 files changed, 83 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt b/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt
> index 963e100..c137436 100644
> --- a/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt
> +++ b/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt
> @@ -1,7 +1,9 @@
>  * Texas Instruments SoC audio setups with TLV320AIC3X Codec
>  
>  Required properties:
> -- compatible : "ti,da830-evm-audio" : forDM365/DA8xx/OMAPL1x/AM33xx
> +- compatible : "ti,da830-evm-audio" : for DM365/DA8xx/OMAPL1x/AM33xx
> +               "ti,am335x-beaglebone-black-audio" : for Beaglebone-black HDMI
> +                                                    audio

To keep this legible I'd recommend reorganising this like:

- compatible: should contain one of:
   * "ti,da830-evm-audio" for DM365/DA8xx/OMAPL1x/AM33xx
   * "ti,am335x-beaglebone-black-audio" for Beaglebone-black HDMI audio

For the BBB case, do you expect both strings or just the BBB-specific
string?

Is the 'x' in the BBB string a wildcard? If we know the particular
number for BBB we should use that.

Cheers,
Mark.
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