1 files changed, 11 insertions, 4 deletions

diff --git a/Documentation/watchdog/wdt.txt b/Documentation/watchdog/wdt.txt
index 03fd756d976d..061c2e35384f 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
-