diff options
| author | Wim Van Sebroeck <wim@iguana.be> | 2011-11-29 16:24:16 +0100 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2012-01-06 15:22:04 +0100 |
| commit | ff0b3cd4a416bc727b0797b95b229b278d2a28f2 (patch) | |
| tree | cd6bdc2304ee8fd751f3bd79607c7bcaf337e198 /Documentation/watchdog | |
| parent | b8ec61189f3b4cd9d1b2856342f5d7676151d01c (diff) | |
| download | lwn-ff0b3cd4a416bc727b0797b95b229b278d2a28f2.tar.gz lwn-ff0b3cd4a416bc727b0797b95b229b278d2a28f2.zip | |
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>
Diffstat (limited to 'Documentation/watchdog')
| -rw-r--r-- | Documentation/watchdog/watchdog-kernel-api.txt | 10 |
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. |