* I2C controller embedded in Marvell Octeon platforms

Required properties :
- compatible : Must be "cavium,octeon-7890-twsi" or a compatible string
- reg : Offset and length of the register set for the device
- clocks: Must contain the input clock of the I2C instance
- #address-cells = <1>;
- #size-cells = <0>;

Optional properties :
- clock-frequency : Desired I2C bus clock frequency in Hz. If not specified,
  the default 100 kHz frequency will be used. As only Normal, Fast and Fast+
  modes are implemented, possible values are 100000, 400000 and 1000000.

Example :

	i2c0: i2c@1180000001000 {
		#address-cells = <1>;
		#size-cells = <0>;
		compatible = "cavium,octeon-7890-twsi";
		reg = <0x11800 0x00001000 0x0 0x200>;
		clock-frequency = <100000>;
		clocks = <&sclk>;
	};