linux-kernel - [PATCH V2 1/2] ASoC: dt-bindings: audio-graph-port: Add dai-tdm-slot-width-map

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Message-ID: <20220217134835.282389-2-rf@opensource.cirrus.com>
Date:   Thu, 17 Feb 2022 13:48:34 +0000
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <broonie@...nel.org>, <robh+dt@...nel.org>,
        <kuninori.morimoto.gx@...esas.com>
CC:     <alsa-devel@...a-project.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <patches@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH V2 1/2] ASoC: dt-bindings: audio-graph-port: Add dai-tdm-slot-width-map

Some audio hardware cannot support a fixed slot width or a slot width
equal to the sample width in all cases. This is usually due either to
limitations of the audio serial port or system clocking restrictions.

This property allows setting a mapping of sample widths and the
corresponding tdm slot widths.

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
---
 .../devicetree/bindings/sound/audio-graph-port.yaml        | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/audio-graph-port.yaml b/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
index 476dcb49ece6..420adad49382 100644
--- a/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
+++ b/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
@@ -71,4 +71,11 @@ patternProperties:
         description: CPU to Codec rate channels.
         $ref: /schemas/types.yaml#/definitions/uint32
 
+      dai-tdm-slot-width-map:
+        description: Mapping of sample widths to slot widths. For hardware that
+          cannot support a fixed slot width or a slot width equal to sample
+          width. An array containing one or more pairs of values. Each pair
+          of values is a sample_width and the corresponding slot_width.
+        $ref: /schemas/types.yaml#/definitions/uint32-array
+
 additionalProperties: true
-- 
2.30.2