From: Daniel Baluta <daniel.baluta@nxp.com>

Document new playback-only and capture-only flags which can be used
when dai link can only support just one direction: playback or capture
but not both.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
---
 .../devicetree/bindings/sound/audio-graph-port.yaml         | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/audio-graph-port.yaml b/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
index 60b5e3fd1115..b13c08de505e 100644
--- a/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
+++ b/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
@@ -19,6 +19,12 @@ definitions:
     properties:
       mclk-fs:
         $ref: simple-card.yaml#/definitions/mclk-fs
+      playback-only:
+        description: port connection used only for playback
+        $ref: /schemas/types.yaml#/definitions/flag
+      capture-only:
+        description: port connection used only for capture
+        $ref: /schemas/types.yaml#/definitions/flag
 
   endpoint-base:
     allOf:
-- 
2.25.1