xref: /freebsd/share/man/man4/viawd.4 (revision d6b92ffa)
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2.\" Copyright (c) 2011 Fabien Thomas <fabient@FreeBSD.org>
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26.\" $FreeBSD$
27.\"
28.Dd December 7, 2011
29.Dt VIAWD 4
30.Os
31.Sh NAME
32.Nm viawd
33.Nd device driver for VIA south bridge watchdog timer
34.Sh SYNOPSIS
35To compile this driver into the kernel,
36place the following line in your
37kernel configuration file:
38.Bd -ragged -offset indent
39.Cd "device viawd"
40.Ed
41.Pp
42Alternatively, to load the driver as a
43module at boot time, place the following line in
44.Xr loader.conf 5 :
45.Bd -literal -offset indent
46viawd_load="YES"
47.Ed
48.Sh DESCRIPTION
49The
50.Nm
51driver provides
52.Xr watchdog 4
53support for the watchdog interrupt timer present on
54VIA south bridge chipset (VT8251, CX700, VX800, VX855, VX900).
55.Pp
56The VIA south bridge have a built-in watchdog timer,
57which can be enabled and disabled by user's program and set between
581 to 1023 seconds.
59.Pp
60The
61.Nm
62driver when unloaded with running watchdog will reschedule the watchdog
63to 5 minutes.
64.Sh SEE ALSO
65.Xr watchdog 4 ,
66.Xr watchdog 8 ,
67.Xr watchdogd 8 ,
68.Xr watchdog 9
69.Sh HISTORY
70The
71.Nm
72driver first appeared in
73.Fx 10.0 .
74.Sh AUTHORS
75.An -nosplit
76The
77.Nm
78driver and this manual page were written by
79.An Fabien Thomas Aq Mt fabient@FreeBSD.org .
80