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SiRFSoC Timer and Watchdog Timer(WDT) Controller

Required properties:
- compatible: "sirf,prima2-tick"
- reg: Address range of tick timer/WDT register set
- interrupts: interrupt number to the cpu

Optional properties:
- timeout-sec : Contains the watchdog timeout in seconds

Example:

timer@b0020000 {
	compatible = "sirf,prima2-tick";
	reg = <0xb0020000 0x1000>;
	interrupts = <0>;
	timeout-sec = <30>;
};