original_kernel/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt

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* Atmel Watchdog Timers
** at91sam9-wdt
Required properties:
- compatible: must be "atmel,at91sam9260-wdt".
- reg: physical base address of the controller and length of memory mapped
region.
Optional properties:
- timeout-sec: contains the watchdog timeout in seconds.
Example:
watchdog@fffffd40 {
compatible = "atmel,at91sam9260-wdt";
reg = <0xfffffd40 0x10>;
timeout-sec = <10>;
};