diff options
| author | Wim Van Sebroeck <wim@iguana.be> | 2011-07-22 18:57:55 +0000 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2011-07-28 08:01:09 +0000 |
| commit | 234445b4e4542f3e0f216459245ab369a18adcf2 (patch) | |
| tree | ed670bb2aa3eae41f00e5217fb786eaa9fbe6cb3 /Documentation/watchdog | |
| parent | c2dc00e494cc476551b9beeb883910391ff59737 (diff) | |
watchdog: WatchDog Timer Driver Core - Add WDIOC_SETOPTIONS ioctl
This part add's the WDIOC_SETOPTIONS ioctl functionality
to the WatchDog Timer Driver Core framework.
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Diffstat (limited to 'Documentation/watchdog')
| -rw-r--r-- | Documentation/watchdog/watchdog-kernel-api.txt | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/Documentation/watchdog/watchdog-kernel-api.txt b/Documentation/watchdog/watchdog-kernel-api.txt index abbcf2ce8f6..429f81bf0cf 100644 --- a/Documentation/watchdog/watchdog-kernel-api.txt +++ b/Documentation/watchdog/watchdog-kernel-api.txt @@ -56,8 +56,9 @@ It contains following fields: This data should only be accessed via the watchdog_set_drvadata and watchdog_get_drvdata routines. * status: this field contains a number of status bits that give extra - information about the status of the device (Like: is the device opened via - the /dev/watchdog interface or not, ...). + information about the status of the device (Like: is the watchdog timer + running/active, is the device opened via the /dev/watchdog interface or not, + ...). The list of watchdog operations is defined as: @@ -109,6 +110,10 @@ they are supported. These optional routines/operations are: The status bits should (preferably) be set with the set_bit and clear_bit alike bit-operations. The status bits that are defined are: +* WDOG_ACTIVE: this status bit indicates whether or not a watchdog timer device + is active or not. When the watchdog is active after booting, then you should + set this status bit (Note: when you register the watchdog timer device with + this bit set, then opening /dev/watchdog will skip the start operation) * WDOG_DEV_OPEN: this status bit shows whether or not the watchdog device was opened via /dev/watchdog. (This bit should only be used by the WatchDog Timer Driver Core). |