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Man Pages
VIAWD(4) FreeBSD Kernel Interfaces Manual VIAWD(4)

viawd —
device driver for VIA south bridge watchdog timer

To compile this driver into the kernel, place the following line in your kernel configuration file:
device viawd

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

viawd_load="YES"

The viawd driver provides watchdog(4) support for the watchdog interrupt timer present on VIA south bridge chipset (VT8251, CX700, VX800, VX855, VX900).

The VIA south bridge have a built-in watchdog timer, which can be enabled and disabled by user's program and set between 1 to 1023 seconds.

The viawd driver when unloaded with running watchdog will reschedule the watchdog to 5 minutes.

watchdog(4), watchdog(8), watchdogd(8), watchdog(9)

The viawd driver first appeared in FreeBSD 10.0.

The viawd driver and this manual page were written by Fabien Thomas <fabient@FreeBSD.org>.
December 7, 2011 FreeBSD 13.1-RELEASE
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