[PATCH v3 1/2] ASoC: dt-bindings: imx-card: Add playback-only and capture-only property

[Shengjiu Wang <shengjiu.wang@xxxxxxx>]

Refer to audio graph card, add playback-only and capture-only property
for imx-audio-card.yaml for the case that only playback or capture is
supported.

Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx>
Reviewed-by: Daniel Baluta <daniel.baluta@xxxxxxx>
Reviewed-by: Iuliana Prodan <iuliana.prodan@xxxxxxx>
---
 .../devicetree/bindings/sound/imx-audio-card.yaml  | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/imx-audio-card.yaml b/Documentation/devicetree/bindings/sound/imx-audio-card.yaml
index f7ad5ea2491e..3c75c8c78987 100644
--- a/Documentation/devicetree/bindings/sound/imx-audio-card.yaml
+++ b/Documentation/devicetree/bindings/sound/imx-audio-card.yaml
@@ -46,6 +46,14 @@ patternProperties:
         description: see tdm-slot.txt.
         $ref: /schemas/types.yaml#/definitions/uint32
 
+      playback-only:
+        description: link is used only for playback
+        $ref: /schemas/types.yaml#/definitions/flag
+
+      capture-only:
+        description: link is used only for capture
+        $ref: /schemas/types.yaml#/definitions/flag
+
       cpu:
         description: Holds subnode which indicates cpu dai.
         type: object
@@ -71,6 +79,12 @@ patternProperties:
       - link-name
       - cpu
 
+    allOf:
+      - not:
+          required:
+            - playback-only
+            - capture-only
+
     additionalProperties: false
 
 required:
-- 
2.34.1