linux/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt
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   1* Samsung's Watchdog Timer Controller
   2
   3The Samsung's Watchdog controller is used for resuming system operation
   4after a preset amount of time during which the WDT reset event has not
   5occurred.
   6
   7Required properties:
   8- compatible : should be "samsung,s3c2410-wdt"
   9- reg : base physical address of the controller and length of memory mapped
  10        region.
  11- interrupts : interrupt number to the cpu.
  12
  13Optional properties:
  14- timeout-sec : contains the watchdog timeout in seconds.
  15