[PATCH 04/11] ASoC: dt-bindings: rockchip: Document audio graph port

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The Rockchip I2S controller is currently used in conjunction with
audio-graph-card to provide an endpoint for binding with the other side
of the audio link.

This is achieved via the 'port' property, which is not allowed:

  rk3399-rockpro64.dtb: i2s@ff890000: Unevaluated properties are not allowed ('port' was unexpected)

Fix the issue by documenting the missing property.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/sound/rockchip-i2s.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml b/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml
index 1cb4da300607..c32b4750651c 100644
--- a/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml
+++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml
@@ -82,6 +82,10 @@ properties:
   resets:
     maxItems: 2
 
+  port:
+    $ref: audio-graph-port.yaml#
+    unevaluatedProperties: false
+
   rockchip,capture-channels:
     $ref: /schemas/types.yaml#/definitions/uint32
     default: 2
-- 
2.39.1




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