[PATCH 5/7] dt-bindings: mchp,i2s-mcc: Add property to specify pin pair for TDM

[Codrin Ciubotariu]

SAMA7G5's I2S-MCC has 4 pairs of DIN/DOUT pins. Since TDM only uses a
single pair of pins for synchronous capture and playback, the controller
needs to be told which of the pair is connected. This can be mentioned
using the new "microchip,tdm-data-pair" property. The property is optional,
needed only if TDM is used, and if it's missing DIN/DOUT 0 pins will be
used by default.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@xxxxxxxxxxxxx>
---
 .../devicetree/bindings/sound/mchp,i2s-mcc.yaml | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/mchp,i2s-mcc.yaml b/Documentation/devicetree/bindings/sound/mchp,i2s-mcc.yaml
index a8a73f3ed473..0481315cb5f2 100644
--- a/Documentation/devicetree/bindings/sound/mchp,i2s-mcc.yaml
+++ b/Documentation/devicetree/bindings/sound/mchp,i2s-mcc.yaml
@@ -57,6 +57,23 @@ properties:
       - const: tx
       - const: rx
 
+  microchip,tdm-data-pair:
+    description:
+      Represents the DIN/DOUT pair pins that are used to receive/send
+      TDM data. It is optional and it is only needed if the controller
+      uses the TDM mode.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    enum: [0, 1, 2, 3]
+    default: 0
+
+if:
+  properties:
+    compatible:
+      const: microchip,sam9x60-i2smcc
+then:
+  properties:
+    microchip,tdm-data-pair: false
+
 required:
   - "#sound-dai-cells"
   - compatible
-- 
2.27.0