watchdog: Delete the cpu5wdt driver

This driver has a number of issues (accesses arbitrary I/O ports
without identifying the hardware, doesn't document what hardware it
supports, suspiciously inconsistent locking model, doesn't implement
WDIOC_SETTIMEOUT, potential integer overflow...)

The driver was added in 2003 and there's no evidence that it has any
recent user, all changes seem to be tree-wide, subsystem-wide, or the
result of static code analysis. So I believe we should simply drop
this legacy piece of code.

Signed-off-by: Jean Delvare <[email protected]>
Message-ID: <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>

Author: jdelvare

Documentation/watchdog/watchdog-parameters.rst

@@ -120,16 +120,6 @@ coh901327_wdt:
 
 -------------------------------------------------
 
-cpu5wdt:
-    port:
-	base address of watchdog card, default is 0x91
-    verbose:
-	be verbose, default is 0 (no)
-    ticks:
-	count down ticks, default is 10000
-
--------------------------------------------------
-
 cpwd:
     wd0_timeout:
 	Default watchdog0 timeout in 1/10secs

drivers/watchdog/Kconfig

@@ -1541,14 +1541,6 @@ config SBC7240_WDT
 	  To compile this driver as a module, choose M here: the
 	  module will be called sbc7240_wdt.
 
-config CPU5_WDT
-	tristate "SMA CPU5 Watchdog"
-	depends on (X86 || COMPILE_TEST) && HAS_IOPORT
-	help
-	  TBD.
-	  To compile this driver as a module, choose M here: the
-	  module will be called cpu5wdt.
-
 config SMSC_SCH311X_WDT
 	tristate "SMSC SCH311X Watchdog Timer"
 	depends on (X86 || COMPILE_TEST) && HAS_IOPORT

drivers/watchdog/Makefile

@@ -138,7 +138,6 @@ obj-$(CONFIG_RDC321X_WDT) += rdc321x_wdt.o
 obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
 obj-$(CONFIG_SBC8360_WDT) += sbc8360.o
 obj-$(CONFIG_SBC7240_WDT) += sbc7240_wdt.o
-obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o
 obj-$(CONFIG_SMSC_SCH311X_WDT) += sch311x_wdt.o
 obj-$(CONFIG_SMSC37B787_WDT) += smsc37b787_wdt.o
 obj-$(CONFIG_TQMX86_WDT) += tqmx86_wdt.o