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>

1 files changed, 9 insertions, 1 deletions

diff --git a/Documentation/watchdog/watchdog-kernel-api.txt b/Documentation/watchdog/watchdog-kernel-api.txt
index 4f7c894244d2..4b93c28e35c6 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 @@ bit-operations. The status bits that are defined are:
 * 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.