NAME
wdog_register —
kernel watchdog interface
SYNOPSIS
#include
<sys/systm.h>
void
wdog_register(int
(*cb)(void *cb_arg, int period),
void *cb_arg);
DESCRIPTION
The kernel watchdog interface is used by hardware watchdog drivers and should be used for all future drivers.
wdog_register()
is called by the hardware driver after configuring the hardware watchdog
device. The cb_arg argument is a pointer to the
hardware device control structure. The cb argument is
a pointer to a function supplied by the driver which sets the timeout in the
hardware device.
The cb_arg parameter given to cb is a pointer to the device control structure. The period parameter supplies the desired timeout value in seconds. A period value of zero disables the watchdog. Setting the timeout to a nonzero value after disabling the watchdog will update the timeout value and enable the watchdog.
CODE REFERENCES
The framework is implemented in the file sys/kern/kern_watchdog.c.
SEE ALSO
HISTORY
The watchdog timer framework was written by Markus Friedl <markus@openbsd.org> and first appeared in OpenBSD 3.3.