Add a note for enabling wakeup capabilities of usart
Signed-off-by: Bich Hemon <bich.hemon@xxxxxx>
Signed-off-by: Erwan Le Ray <erwan.leray@xxxxxx>
diff --git a/Documentation/devicetree/bindings/serial/st,stm32-usart.txt b/Documentation/devicetree/bindings/serial/st,stm32-usart.txt
index 9d3efed..5ec80c1 100644
--- a/Documentation/devicetree/bindings/serial/st,stm32-usart.txt
+++ b/Documentation/devicetree/bindings/serial/st,stm32-usart.txt
@@ -19,6 +19,11 @@ Optional properties:
linux,rs485-enabled-at-boot-time: see rs485.txt.
- dmas: phandle(s) to DMA controller node(s). Refer to stm32-dma.txt
- dma-names: "rx" and/or "tx"
+- wakeup-source: bool flag to indicate this device has wakeup capabilities
+- interrupt-names, if optional wake-up interrupt is used, should be:
+ - "event": the name for the interrupt line of the USART instance
+ - "wakeup" the name for the optional wake-up interrupt
+
Examples:
usart4: serial@40004c00 {
--
1.9.1
