watchdog: update/improve/consolidate watchdog driver

Move the limited watchdog driver help from kernel-parameters.txt
to Documentation/watchdog/watchdog-parameters.txt and add info to it
for all watchdog drivers except the ones that have driver-specific
files already.

Correct minor comments and MODULE_PARM_DESC() text in 2 places.
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

Documentation/kernel-parameters.txt

@@ -290,9 +290,6 @@ and is between 256 and 4096 characters. It is defined in the file
 	advansys=	[HW,SCSI]
 			See header of drivers/scsi/advansys.c.
 
-	advwdt=		[HW,WDT] Advantech WDT
-			Format: <iostart>,<iostop>
-
 	aedsp16=	[HW,OSS] Audio Excel DSP 16
 			Format: <io>,<irq>,<dma>,<mss_io>,<mpu_io>,<mpu_irq>
 			See also header of sound/oss/aedsp16.c.
@@ -765,9 +762,6 @@ and is between 256 and 4096 characters. It is defined in the file
 			This option is obsoleted by the "netdev=" option, which
 			has equivalent usage. See its documentation for details.
 
-	eurwdt=		[HW,WDT] Eurotech CPU-1220/1410 onboard watchdog.
-			Format: <io>[,<irq>]
-
 	failslab=
 	fail_page_alloc=
 	fail_make_request=[KNL]
@@ -2267,9 +2261,6 @@ and is between 256 and 4096 characters. It is defined in the file
 
 	sched_debug	[KNL] Enables verbose scheduler debug messages.
 
-	sc1200wdt=	[HW,WDT] SC1200 WDT (watchdog) driver
-			Format: <io>[,<timeout>[,<isapnp>]]
-
 	scsi_debug_*=	[SCSI]
 			See drivers/scsi/scsi_debug.c.
 
@@ -2858,8 +2849,10 @@ and is between 256 and 4096 characters. It is defined in the file
 	wd7000=		[HW,SCSI]
 			See header of drivers/scsi/wd7000.c.
 
-	wdt=		[WDT] Watchdog
-			See Documentation/watchdog/wdt.txt.
+	watchdog timers	[HW,WDT] For information on watchdog timers,
+			see Documentation/watchdog/watchdog-parameters.txt
+			or other driver-specific files in the
+			Documentation/watchdog/ directory.
 
 	x2apic_phys	[X86-64,APIC] Use x2apic physical mode instead of
 			default x2apic cluster mode on platforms

Documentation/watchdog/00-INDEX

 00-INDEX
 	- this file.
+hpwdt.txt
+	- information on the HP iLO2 NMI watchdog
 pcwd-watchdog.txt
 	- documentation for Berkshire Products PC Watchdog ISA cards.
 src/
 	- directory holding watchdog related example programs.
 watchdog-api.txt
 	- description of the Linux Watchdog driver API.
+watchdog-parameters.txt
+	- information on driver parameters (for drivers other than
+	  the ones that have driver-specific files here)
 wdt.txt
 	- description of the Watchdog Timer Interfaces for Linux.

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
-

drivers/watchdog/eurotechwdt.c

@@ -68,7 +68,6 @@ static spinlock_t eurwdt_lock;
 
 /*
  * You must set these - there is no sane way to probe for this board.
- * You can use eurwdt=x,y to set these now.
  */
 
 static int io = 0x3f0;

drivers/watchdog/wdt.c

@@ -91,7 +91,7 @@ MODULE_PARM_DESC(tachometer,
 static int type = 500;
 module_param(type, int, 0);
 MODULE_PARM_DESC(type,
-		"WDT501-P Card type (500 or 501 , default=500)");
+		"WDT501-P Card type (500 or 501, default=500)");
 
 /*
  *	Programming support