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watchdog: WatchDog Timer Driver Core - Add Magic Close feature

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Add support for the Magic Close feature to the
WatchDog Timer Driver Core framework.

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 18:58:54 +00:00
commit 017cf08051
3 changed files with 32 additions and 3 deletions
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7
Documentation/watchdog/watchdog-kernel-api.txt
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@ -127,6 +127,13 @@ bit-operations. The status bits that are defined are:
* 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).
* WDOG_ALLOW_RELEASE: this bit stores whether or not the magic close character
has been sent (so that we can support the magic close feature).
(This bit should only be used by the WatchDog Timer Driver Core).
Note: The WatchDog Timer Driver Core supports the magic close feature. To use
the magic close feature you must set the WDIOF_MAGICCLOSE bit in the options
field of the watchdog's info structure.
To get or set driver specific data the following two helper functions should be
used: