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Diffstat (limited to 'Documentation/watchdog/wdt.txt')
| -rw-r--r-- | Documentation/watchdog/wdt.txt | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/Documentation/watchdog/wdt.txt b/Documentation/watchdog/wdt.txt index 03fd756d976..061c2e35384 100644 --- a/Documentation/watchdog/wdt.txt +++ b/Documentation/watchdog/wdt.txt @@ -14,14 +14,22 @@ 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 +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 wdt card cannot be safely probed for. Instead you need to pass -wdt=ioaddr,irq as a boot parameter - eg "wdt=0x240,11". +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 -------- @@ -40,4 +48,3 @@ Minor numbers are however allocated for it. Example Watchdog Driver: see Documentation/watchdog/src/watchdog-simple.c - |