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watchdog: WatchDog Timer Driver Core - Add WDIOC_KEEPALIVE ioctl

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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 <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: Wolfram Sang <[email protected]>
This commit is contained in:
Wim Van Sebroeck 2011-07-22 18:57:23 +00:00
commit c2dc00e494
2 changed files with 8 additions and 0 deletions
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3
Documentation/watchdog/watchdog-kernel-api.txt
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@ -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.