1.\"- 2.\" Copyright (c) 2011 Fabien Thomas <fabient@FreeBSD.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS `AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 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