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 <redacted>
---
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..ad968fc2493b 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