diff --git a/Documentation/devicetree/bindings/sound/rockchip,multicodecs.txt b/Documentation/devicetree/bindings/sound/rockchip,multicodecs.txt
index 45c9ae0388c4..18e4e4741689 100644
--- a/Documentation/devicetree/bindings/sound/rockchip,multicodecs.txt
+++ b/Documentation/devicetree/bindings/sound/rockchip,multicodecs.txt
@@ -5,11 +5,14 @@ Required properties:
 - rockchip,cpu: The phandle of the Rockchip I2S/PDM controller that's
   connected to the CODEC
 - rockchip,codec: The phandle of audio codecs
+- rockchip,mclk-fs: Multiplication factor between stream rate and codec mclk,
+  applied only for the dai-link.
 
 Example:
 
 sound {
 	compatible = "rockchip,multicodecs-card";
+	rockchip,mclk-fs = <256>;
 	rockchip,cpu = <&i2s0_8ch>;
 	rockchip,codec = <&codec>, <&vad>;
 };