[WATCHDOG] Watchdog driver for AT32AP700X devices

Add support for the built in watchdog in AT32AP700X devices.

Tested on AT32AP7000 and ATSTK1000.

Hardware documentation can be found in the AT32AP7000 datasheet.

Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/char/watchdog/Kconfig b/drivers/char/watchdog/Kconfig
index 53f5538c0c05..520afb8e5234 100644
--- a/drivers/char/watchdog/Kconfig
+++ b/drivers/char/watchdog/Kconfig
@@ -187,6 +187,26 @@ config PNX4008_WATCHDOG
 
           Say N if you are unsure.
 
+# AVR32 Architecture
+
+config AT32AP700X_WDT
+        tristate "AT32AP700x watchdog"
+        depends on WATCHDOG && CPU_AT32AP7000
+        help
+          Watchdog timer embedded into AT32AP700x devices. This will reboot
+          your system when the timeout is reached.
+
+config AT32AP700X_WDT_TIMEOUT
+        int "Timeout value for AT32AP700x watchdog"
+        depends on AT32AP700X_WDT
+        default "2"
+        range 1 2
+        help
+          Sets the timeout value for the watchdog in AT32AP700x devices.
+          Limited by hardware to be 1 or 2 seconds.
+
+          Set to 2 seconds by default.
+
 # X86 (i386 + ia64 + x86_64) Architecture
 
 config ACQUIRE_WDT