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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-13 16:00:22 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-13 16:00:22 +0100 |
| commit | 4de3a8e101150feaefa1139611a50ff37467f33e (patch) | |
| tree | daada742542518b02d7db7c5d32e715eaa5f166d /Documentation/watchdog/watchdog-kernel-api.txt | |
| parent | ARM: 7275/1: LPAE: Check the CPU support for the long descriptor format (diff) | |
| parent | Merge branch 'akpm' (aka "Andrew's patch-bomb, take two") (diff) | |
| download | linux-4de3a8e101150feaefa1139611a50ff37467f33e.tar.xz linux-4de3a8e101150feaefa1139611a50ff37467f33e.zip | |
Merge branch 'master' into fixes
Diffstat (limited to 'Documentation/watchdog/watchdog-kernel-api.txt')
| -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. |