[PATCH 6/6] doc: dt-binding: cdns,usb3: add wakeup-irq

[Peter Chen <peter.chen@xxxxxxx>]

To support low power mode for controller, the driver needs wakeup-irq
to reflect the signal changing after controller is stopped, and waking
the controller up accordingly.

Signed-off-by: Peter Chen <peter.chen@xxxxxxx>
---
 Documentation/devicetree/bindings/usb/cdns,usb3.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/cdns,usb3.yaml b/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
index ac20b98e9910..0171e64ef95e 100644
--- a/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
+++ b/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
@@ -30,12 +30,15 @@ properties:
       - description: OTG/DRD controller interrupt
       - description: XHCI host controller interrupt
       - description: Device controller interrupt
+      - description: interrupt used to wake up core, eg: when usbcmd.rs is
+      cleared by xhci core, this interrupt is optional.
 
   interrupt-names:
     items:
       - const: host
       - const: peripheral
       - const: otg
+      - const: wakeup
 
   dr_mode:
     enum: [host, otg, peripheral]
-- 
2.17.1