diff --git a/Documentation/devicetree/bindings/hwlock/rockchip-hwspinlock.txt b/Documentation/devicetree/bindings/hwlock/rockchip-hwspinlock.txt
index 245b36e5c5bd..4520b26cdebc 100644
--- a/Documentation/devicetree/bindings/hwlock/rockchip-hwspinlock.txt
+++ b/Documentation/devicetree/bindings/hwlock/rockchip-hwspinlock.txt
@@ -10,6 +10,8 @@ Required properties :
 - #hwlock-cells : hwlock users only use the hwlock id to represent a specific
 	hwlock, so the number of cells should be <1> here.
 
+- rockchip,hwlock-num-locks ：number of hwlocks provided by this device.
+
 Optional properties :
 - rockchip,hwlock-user-id : Set hwlock user id (4 bit, default is 0x01).
 
@@ -21,6 +23,7 @@ Example of hwlock provider:
 		compatible = "rockchip,hwspinlock";
 		reg = <0 0xff040000 0 0x10000>;
 		#hwlock-cells = <1>;
+		rockchip,hwlock-num-locks = <64>;
 	};
 
 Example of hwlock users: