dt-bindings: serial: atmel,at91-usart: Add gclk as a possible USART clock

The Devicetree nodes for FLEXCOM's USART can also have an alternative
clock source for the baudrate generator (other than the peripheral
clock), namely the Generick Clock. Thus make the binding aware of
this clock that someone may place in the clock related
properties of the USART node.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220922113347.144383-6-sergiu.moga@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/serial/atmel,at91-usart.yaml b/Documentation/devicetree/bindings/serial/atmel,at91-usart.yaml
index 4da642763befad10871cf6d51f6ef0523929d46d..30b2131b586018f663e17750bb428e2a48798633 100644 (file)
--- a/Documentation/devicetree/bindings/serial/atmel,at91-usart.yaml
+++ b/Documentation/devicetree/bindings/serial/atmel,at91-usart.yaml
@@ -36,10 +36,16 @@ properties:
     maxItems: 1
 
   clock-names:
-    const: usart
+    minItems: 1
+    items:
+      - const: usart
+      - const: gclk
 
   clocks:
-    maxItems: 1
+    minItems: 1
+    items:
+      - description: USART Peripheral Clock
+      - description: USART Generic Clock
 
   dmas:
     items: