[PATCH v6 3/4] ASoC: dt-bindings: fsl-sai: allow only one dma-names

[Frank Li <Frank.Li@xxxxxxx>]

Some sai only connect one direction dma (rx/tx) in SOC. For example:
imx8qxp sai5 only connect tx dma channel. So allow only one "rx" or "tx"
for dma-names.

Remove description under dmas because no user use index to get dma channel.
All user use 'dma-names' to get correct dma channel. dma-names already in
'required' list.

Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
 Documentation/devicetree/bindings/sound/fsl,sai.yaml | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/fsl,sai.yaml b/Documentation/devicetree/bindings/sound/fsl,sai.yaml
index 2456d958adeef..93e7737a49a7b 100644
--- a/Documentation/devicetree/bindings/sound/fsl,sai.yaml
+++ b/Documentation/devicetree/bindings/sound/fsl,sai.yaml
@@ -81,15 +81,13 @@ properties:
 
   dmas:
     minItems: 1
-    items:
-      - description: DMA controller phandle and request line for RX
-      - description: DMA controller phandle and request line for TX
+    maxItems: 2
 
   dma-names:
     minItems: 1
+    maxItems: 2
     items:
-      - const: rx
-      - const: tx
+      enum: [ rx, tx ]
 
   interrupts:
     items:

-- 
2.34.1