[PATCH v3 3/4] ASoC: dt-bindings: fsl-sai: allow only one dma-names

[Frank Li <Frank.Li@xxxxxxx>]

Some sai only connect one direction. So allow only "rx" or "tx" for
dma-names.

Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
 Documentation/devicetree/bindings/sound/fsl,sai.yaml | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/fsl,sai.yaml b/Documentation/devicetree/bindings/sound/fsl,sai.yaml
index 2456d958adeef..0302752d58a2b 100644
--- a/Documentation/devicetree/bindings/sound/fsl,sai.yaml
+++ b/Documentation/devicetree/bindings/sound/fsl,sai.yaml
@@ -86,10 +86,14 @@ properties:
       - description: DMA controller phandle and request line for TX
 
   dma-names:
-    minItems: 1
-    items:
-      - const: rx
-      - const: tx
+    oneOf:
+      - items:
+          - const: rx
+          - const: tx
+      - items:
+          - enum:
+              - rx
+              - tx
 
   interrupts:
     items:

-- 
2.34.1