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diff --git a/Documentation/devicetree/bindings/rtc/via,vt8500-rtc.txt b/Documentation/devicetree/bindings/rtc/via,vt8500-rtc.txt
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+VIA/Wondermedia VT8500 Realtime Clock Controller
+-----------------------------------------------------
+
+Required properties:
+- compatible : "via,vt8500-rtc"
+- reg : Should contain 1 register ranges(address and length)
+- interrupts : alarm interrupt
+
+Example:
+
+        rtc@d8100000 {
+                compatible = "via,vt8500-rtc";
+                reg = <0xd8100000 0x10000>;
+                interrupts = <48>;
+        };