[alsa-devel] [PATCH v10 2/2] ASoC: fsl: Add S/PDIF machine driver
swarren at wwwdotorg.org
Wed Aug 21 20:30:59 CEST 2013
On 08/20/2013 09:13 PM, Nicolin Chen wrote:
> This patch implements a device-tree-only machine driver for Freescale
> i.MX series Soc. It works with spdif_transmitter/spdif_receiver and
> fsl_spdif.c drivers.
> diff --git a/Documentation/devicetree/bindings/sound/imx-audio-spdif.txt b/Documentation/devicetree/bindings/sound/imx-audio-spdif.txt
> +Optional properties:
> + - spdif-transmitter : The phandle of the spdif-transmitter codec
> + - spdif-receiver : The phandle of the spdif-receiver codec
> +* Note: At least one of these two properties should be set in the DT binding.
I still don't think those two properties are correct.
Exactly what node will those phandles point at?
There definitely should not be a DT node for any "dummy CODEC",
irrespective of whether this binding calls the other node a "CODEC" or a
If these properties are to contain phandles, it would be acceptable for
the referenced node to be:
* A node representing the physical connector/jack on the board.
* A node representing some other IP block on the board, such as an HDMI
I think those options are unlikely in general, so I think instead these
properties should just be Boolean indicating that "something" is
connector to the S/PDIF RX/TX, without specifying what that "something"
is. It doesn't matter what at least in the connector/jack case, although
perhaps it does in the HDMI encoder/display-controller?
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