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watchdog: WatchDog Timer Driver Core - Add minimum and max timeout

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Add min_timeout (minimum timeout) and max_timeout
values so that the framework can check if the new
timeout value is between the minimum and maximum
timeout values. If both values are 0, then the
framework will leave the check for the watchdog
device driver itself.

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 19:00:16 +00:00
commit 3f43f68e29
4 changed files with 21 additions and 0 deletions
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4
Documentation/watchdog/watchdog-kernel-api.txt
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@ -43,6 +43,8 @@ struct watchdog_device {
const struct watchdog_ops *ops;
unsigned int bootstatus;
unsigned int timeout;
unsigned int min_timeout;
unsigned int max_timeout;
void *driver_data;
unsigned long status;
};
@ -52,6 +54,8 @@ It contains following fields:
additional information about the watchdog timer itself. (Like it's unique name)
* ops: a pointer to the list of watchdog operations that the watchdog supports.
* timeout: the watchdog timer's timeout value (in seconds).
* min_timeout: the watchdog timer's minimum timeout value (in seconds).
* max_timeout: the watchdog timer's maximum timeout value (in seconds).
* bootstatus: status of the device after booting (reported with watchdog
WDIOF_* status bits).
* driver_data: a pointer to the drivers private data of a watchdog device.