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diff --git a/Documentation/devicetree/bindings/i2c/cavium-i2c.txt b/Documentation/devicetree/bindings/i2c/cavium-i2c.txt
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+* Two Wire Serial Interface (TWSI) / I2C
+
+- compatible: "cavium,octeon-3860-twsi"
+
+  Compatibility with all cn3XXX, cn5XXX and cn6XXX SOCs.
+
+- reg: The base address of the TWSI/I2C bus controller register bank.
+
+- #address-cells: Must be <1>.
+
+- #size-cells: Must be <0>.  I2C addresses have no size component.
+
+- interrupts: A single interrupt specifier.
+
+- clock-frequency: The I2C bus clock rate in Hz.
+
+Example:
+        twsi0: i2c@1180000001000 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                compatible = "cavium,octeon-3860-twsi";
+                reg = <0x11800 0x00001000 0x0 0x200>;
+                interrupts = <0 45>;
+                clock-frequency = <100000>;
+
+                rtc@68 {
+                        compatible = "dallas,ds1337";
+                        reg = <0x68>;
+                };
+                tmp@4c {
+                        compatible = "ti,tmp421";
+                        reg = <0x4c>;
+                };
+        };