diff --git a/Documentation/devicetree/bindings/mfd/mt6397.txt b/Documentation/devicetree/bindings/mfd/mt6397.txt
index d59063503b0d..0088442efca1 100644
--- a/Documentation/devicetree/bindings/mfd/mt6397.txt
+++ b/Documentation/devicetree/bindings/mfd/mt6397.txt
@@ -30,6 +30,7 @@ Optional subnodes:
 - rtc
 	Required properties: Should be one of follows
 		- compatible: "mediatek,mt6323-rtc"
+		- compatible: "mediatek,mt6331-rtc"
 		- compatible: "mediatek,mt6358-rtc"
 		- compatible: "mediatek,mt6397-rtc"
 	For details, see ../rtc/rtc-mt6397.txt
@@ -53,8 +54,10 @@ Optional subnodes:
 	see ../leds/leds-mt6323.txt
 
 - keys
-	Required properties:
-		- compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-keys"
+	Required properties: Should be one of the following
+		- compatible: "mediatek,mt6323-keys"
+		- compatible: "mediatek,mt6331-keys"
+		- compatible: "mediatek,mt6397-keys"
 	see ../input/mtk-pmic-keys.txt
 
 - power-controller