[PATCH V4] dt-bindings: serial: Add a new compatible string for UMS9632

[Wenhua Lin <Wenhua.Lin@unisoc.com>]

The UART IP version of the ums9632 SoC project has been upgraded.
UART controller registers have added valid bits to support new features.
In order to distinguish different UART IP versions, we use sc9632-uart
to represent upgraded IP and sc9836-uart to represent old IP.

Signed-off-by: Wenhua Lin <Wenhua.Lin@unisoc.com>
---
V3->V4 changes:
* Modify the indentation format.

V2->V3 changes:
* Lists are ordered by fallback.
* Combine two const items into enum.
* Change commit message.

V1->V2 changes:
* Modify the compatible string of enum.
* Change commit message.
---
 Documentation/devicetree/bindings/serial/sprd-uart.yaml | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/serial/sprd-uart.yaml b/Documentation/devicetree/bindings/serial/sprd-uart.yaml
index a2a5056eba04..5bf2656afcfd 100644
--- a/Documentation/devicetree/bindings/serial/sprd-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/sprd-uart.yaml
@@ -17,13 +17,18 @@ properties:
     oneOf:
       - items:
           - enum:
-              - sprd,sc9632-uart
+              - sprd,ums9632-uart
+          - const: sprd,sc9632-uart
+      - items:
+          - enum:
               - sprd,sc9860-uart
               - sprd,sc9863a-uart
               - sprd,ums512-uart
               - sprd,ums9620-uart
           - const: sprd,sc9836-uart
-      - const: sprd,sc9836-uart
+      - enum:
+          - sprd,sc9632-uart
+          - sprd,sc9836-uart
 
   reg:
     maxItems: 1
-- 
2.34.1