[PATCH] dt-bindings: usb: usb251xb: add documentation for boost-up property

[Tommaso Merciai]

Add documentation for the optional property boost-up.

Signed-off-by: Tommaso Merciai <tomm.merciai@xxxxxxxxx>
---
 Documentation/devicetree/bindings/usb/usb251xb.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/usb251xb.txt b/Documentation/devicetree/bindings/usb/usb251xb.txt
index 1a934eab175e..29b5d6521f3c 100644
--- a/Documentation/devicetree/bindings/usb/usb251xb.txt
+++ b/Documentation/devicetree/bindings/usb/usb251xb.txt
@@ -67,6 +67,8 @@ Optional properties :
 	power. The value is given in ms in a 0 - 510 range (default is 100ms).
  - swap-dx-lanes : Specifies the ports which will swap the differential-pair
 	(D+/D-), default is not-swapped.
+ - boost-up: Property control USB electrical drive strength. There are 4 possible
+	modes: normal (0x00), low (0x01), medium (0x10), high (0x11). Normal default.
 
 Examples:
 	usb2512b@2c {
-- 
2.25.1