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-Last Reviewed: 10/05/2007
-
-	WDT Watchdog Timer Interfaces For The Linux Operating System
-		Alan Cox <alan@lxorguk.ukuu.org.uk>
-
-	ICS	WDT501-P
-	ICS	WDT501-P (no fan tachometer)
-	ICS	WDT500-P
-
-All the interfaces provide /dev/watchdog, which when open must be written
-to within a timeout or the machine will reboot. Each write delays the reboot
-time another timeout. In the case of the software watchdog the ability to
-reboot will depend on the state of the machines and interrupts. The hardware
-boards physically pull the machine down off their own onboard timers and
-will reboot from almost anything.
-
-A second temperature monitoring interface is available on the WDT501P cards.
-This provides /dev/temperature. This is the machine internal temperature in
-degrees Fahrenheit. Each read returns a single byte giving the temperature.
-
-The third interface logs kernel messages on additional alert events.
-
-The ICS ISA-bus wdt card cannot be safely probed for. Instead you need to
-pass IO address and IRQ boot parameters.  E.g.:
-	wdt.io=0x240 wdt.irq=11
-
-Other "wdt" driver parameters are:
-	heartbeat	Watchdog heartbeat in seconds (default 60)
-	nowayout	Watchdog cannot be stopped once started (kernel
-				build parameter)
-	tachometer	WDT501-P Fan Tachometer support (0=disable, default=0)
-	type		WDT501-P Card type (500 or 501, default=500)
-
-Features
---------
-		WDT501P		WDT500P
-Reboot Timer	   X               X
-External Reboot	   X	           X
-I/O Port Monitor   o		   o
-Temperature	   X		   o
-Fan Speed          X		   o
-Power Under	   X               o
-Power Over         X               o
-Overheat           X               o
-
-The external event interfaces on the WDT boards are not currently supported.
-Minor numbers are however allocated for it.
-
-
-Example Watchdog Driver:  see samples/watchdog/watchdog-simple.c