linux-sg2042/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt

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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>;
};