diff --git a/Documentation/devicetree/bindings/arm/altera/socfpga-reset.txt b/Documentation/devicetree/bindings/arm/altera/socfpga-reset.txt
index ecdb57d69dbf..32c1c8bfd5dc 100644
--- a/Documentation/devicetree/bindings/arm/altera/socfpga-reset.txt
+++ b/Documentation/devicetree/bindings/arm/altera/socfpga-reset.txt
@@ -3,9 +3,11 @@ Altera SOCFPGA Reset Manager
 Required properties:
 - compatible : "altr,rst-mgr"
 - reg : Should contain 1 register ranges(address and length)
+- #reset-cells: 1
 
 Example:
 	 rstmgr@ffd05000 {
+		#reset-cells = <1>;
 		compatible = "altr,rst-mgr";
 		reg = <0xffd05000 0x1000>;
 	};