diff options
| author | Wim Van Sebroeck <wim@iguana.be> | 2011-07-22 18:57:23 +0000 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2011-07-28 08:01:07 +0000 |
| commit | c2dc00e494cc476551b9beeb883910391ff59737 (patch) | |
| tree | 2dd417fb7e793af0bd28f9b946628662574269d4 /Documentation/watchdog/watchdog-kernel-api.txt | |
| parent | 2fa03560ab3a6dd83cad9bfd5692179fc2ceabb3 (diff) | |
| download | lwn-c2dc00e494cc476551b9beeb883910391ff59737.tar.gz lwn-c2dc00e494cc476551b9beeb883910391ff59737.zip | |
watchdog: WatchDog Timer Driver Core - Add WDIOC_KEEPALIVE ioctl
This part add's the WDIOC_KEEPALIVE ioctl functionality to the
WatchDog Timer Driver Core framework. Please note that the
WDIOF_KEEPALIVEPING bit has to be set in the watchdog_info
options field.
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/watchdog-kernel-api.txt')
| -rw-r--r-- | Documentation/watchdog/watchdog-kernel-api.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/watchdog/watchdog-kernel-api.txt b/Documentation/watchdog/watchdog-kernel-api.txt index 2bdc6dc6e04c..abbcf2ce8f62 100644 --- a/Documentation/watchdog/watchdog-kernel-api.txt +++ b/Documentation/watchdog/watchdog-kernel-api.txt @@ -101,6 +101,9 @@ they are supported. These optional routines/operations are: the watchdog timer driver core does: to send a keepalive ping to the watchdog timer hardware it will either use the ping operation (when available) or the start operation (when the ping operation is not available). + (Note: the WDIOC_KEEPALIVE ioctl call will only be active when the + WDIOF_KEEPALIVEPING bit has been set in the option field on the watchdog's + info structure). * status: this routine checks the status of the watchdog timer device. The status of the device is reported with watchdog WDIOF_* status flags/bits. |