diff --git a/Documentation/devicetree/bindings/sound/rockchip-i2s.txt b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
index 466841acec35..d48733811bcd 100644
--- a/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
+++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt
@@ -29,6 +29,9 @@ Required properties:
 - clock-names: should contain the following:
    - "i2s_hclk": clock for I2S BUS
    - "i2s_clk" : clock for I2S controller
+- resets: a list of phandle + reset-specifer paris, one for each entry in reset-names.
+- reset-names: reset names, should include "reset-m", "reset-h", there may be only
+  "reset-m" on some platforms.
 - rockchip,playback-channels: max playback channels, if not set, 8 channels default.
 - rockchip,capture-channels: max capture channels, if not set, 2 channels default.
 - rockchip,bclk-fs: configure the i2s bclk fs.