[PATCH v2 1/3] ASoC: dt-bindings: stm32: document audio of graph port for i2s

[Olivier Moysan]

When linking the STM32 I2S to another DAI component, according
to audio graph cards bindings, an OF graph port property is expected
in the node. Document the port property.

Signed-off-by: Olivier Moysan <olivier.moysan at foss.st.com>
---
 .../devicetree/bindings/sound/st,stm32-i2s.yaml       | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/st,stm32-i2s.yaml b/Documentation/devicetree/bindings/sound/st,stm32-i2s.yaml
index a040d4d31412..b9111d375b93 100644
--- a/Documentation/devicetree/bindings/sound/st,stm32-i2s.yaml
+++ b/Documentation/devicetree/bindings/sound/st,stm32-i2s.yaml
@@ -61,6 +61,10 @@ properties:
     description: Configure the I2S device as MCLK clock provider.
     const: 0
 
+  port:
+    $ref: audio-graph-port.yaml#
+    unevaluatedProperties: false
+
 required:
   - compatible
   - "#sound-dai-cells"
@@ -89,6 +93,13 @@ examples:
         dma-names = "rx", "tx";
         pinctrl-names = "default";
         pinctrl-0 = <&i2s2_pins_a>;
+
+        /* assume audio-graph */
+        port {
+            codec_endpoint: endpoint {
+                remote-endpoint = <&codec_endpoint>;
+            };
+        };
     };
 
 ...
-- 
2.25.1