[WATCHDOG] Blackfin on-chip watchdog driver

This patch implements the driver necessary use the Analog Devices
Blackfin processor's on-chip watchdog controller, supports
BF53[123]/BF53[467]/BF54[2489]/BF561.
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

MAINTAINERS

@@ -771,6 +771,14 @@ L:	uclinux-dist-devel@blackfin.uclinux.org (subscribers-only)
 W:	http://blackfin.uclinux.org
 S:	Supported
 
+BLACKFIN WATCHDOG DRIVER
+P:	Mike Frysinger
+M:	michael.frysinger@analog.com
+M:	vapier.adi@gmail.com
+L:	uclinux-dist-devel@blackfin.uclinux.org (subscribers-only)
+W:	http://blackfin.uclinux.org
+S:	Supported
+
 BAYCOM/HDLCDRV DRIVERS FOR AX.25
 P:	Thomas Sailer
 M:	t.sailer@alumni.ethz.ch

drivers/char/watchdog/Kconfig

@@ -212,6 +212,19 @@ config AT32AP700X_WDT
 	  Watchdog timer embedded into AT32AP700x devices. This will reboot
 	  your system when the timeout is reached.
 
+# Blackfin Architecture
+
+config BFIN_WDT
+	tristate "Blackfin On-Chip Watchdog Timer"
+	depends on WATCHDOG && BLACKFIN
+	---help---
+	  If you say yes here you will get support for the Blackfin On-Chip
+	  Watchdog Timer. If you have one of these processors and wish to
+	  have watchdog support enabled, say Y, otherwise say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called bfin_wdt.
+
 # X86 (i386 + ia64 + x86_64) Architecture
 
 config ACQUIRE_WDT

drivers/char/watchdog/Makefile

@@ -40,6 +40,9 @@ obj-$(CONFIG_IOP_WATCHDOG) += iop_wdt.o
 # AVR32 Architecture
 obj-$(CONFIG_AT32AP700X_WDT) += at32ap700x_wdt.o
 
+# Blackfin Architecture
+obj-$(CONFIG_BFIN_WDT) += bfin_wdt.o
+
 # X86 (i386 + ia64 + x86_64) Architecture
 obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
 obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o