watchdog: add nowayout helpers to Watchdog Timer Driver Kernel API
Add two nowayout helpers for the Watchdog Timer Driver Kernel API.
And apply this to the already converted drivers.
Note: s3c2410_wdt lost the nowayout feature during the conversion.
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
diff --git a/Documentation/watchdog/watchdog-kernel-api.txt b/Documentation/watchdog/watchdog-kernel-api.txt
index 4f7c894..4b93c28 100644
--- a/Documentation/watchdog/watchdog-kernel-api.txt
+++ b/Documentation/watchdog/watchdog-kernel-api.txt
@@ -1,6 +1,6 @@
The Linux WatchDog Timer Driver Core kernel API.
===============================================
-Last reviewed: 22-Jul-2011
+Last reviewed: 29-Nov-2011
Wim Van Sebroeck <wim@iguana.be>
@@ -142,6 +142,14 @@
* WDOG_NO_WAY_OUT: this bit stores the nowayout setting for the watchdog.
If this bit is set then the watchdog timer will not be able to stop.
+ To set the WDOG_NO_WAY_OUT status bit (before registering your watchdog
+ timer device) you can either:
+ * set it statically in your watchdog_device struct with
+ .status = WATCHDOG_NOWAYOUT_INIT_STATUS,
+ (this will set the value the same as CONFIG_WATCHDOG_NOWAYOUT) or
+ * use the following helper function:
+ static inline void watchdog_set_nowayout(struct watchdog_device *wdd, int nowayout)
+
Note: The WatchDog Timer Driver Core supports the magic close feature and
the nowayout feature. To use the magic close feature you must set the
WDIOF_MAGICCLOSE bit in the options field of the watchdog's info structure.