[PATCH 1/2] dt-bindings: serial: 8250: support an optional second clock

[Alex Elder <elder@riscstar.com>]

The SpacemiT UART driver requires a bus clock to be enabled in addition
to the primary function clock.  Add the option to specify two clocks
for an 8250-compatible UART, named "core" and "bus".

Signed-off-by: Alex Elder <elder@riscstar.com>
---
 Documentation/devicetree/bindings/serial/8250.yaml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/serial/8250.yaml b/Documentation/devicetree/bindings/serial/8250.yaml
index dc0d52920575f..1adf935b7f36f 100644
--- a/Documentation/devicetree/bindings/serial/8250.yaml
+++ b/Documentation/devicetree/bindings/serial/8250.yaml
@@ -135,7 +135,11 @@ properties:
   clock-frequency: true
 
   clocks:
-    maxItems: 1
+    oneOf:
+      - maxItems: 1
+      - items:
+          - const: core
+          - const: bus
 
   resets:
     maxItems: 1
-- 
2.45.2