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.Dd December 7, 2011 27.Dt VIAWD 4 28.Os 29.Sh NAME 30.Nm viawd 31.Nd device driver for VIA south bridge watchdog timer 32.Sh SYNOPSIS 33To compile this driver into the kernel, 34place the following line in your 35kernel configuration file: 36.Bd -ragged -offset indent 37.Cd "device viawd" 38.Ed 39.Pp 40Alternatively, to load the driver as a 41module at boot time, place the following line in 42.Xr loader.conf 5 : 43.Bd -literal -offset indent 44viawd_load="YES" 45.Ed 46.Sh DESCRIPTION 47The 48.Nm 49driver provides 50.Xr watchdog 4 51support for the watchdog interrupt timer present on 52VIA south bridge chipset (VT8251, CX700, VX800, VX855, VX900). 53.Pp 54The VIA south bridge have a built-in watchdog timer, 55which can be enabled and disabled by user's program and set between 561 to 1023 seconds. 57.Pp 58The 59.Nm 60driver when unloaded with running watchdog will reschedule the watchdog 61to 5 minutes. 62.Sh SEE ALSO 63.Xr watchdog 4 , 64.Xr watchdog 8 , 65.Xr watchdogd 8 , 66.Xr watchdog 9 67.Sh HISTORY 68The 69.Nm 70driver first appeared in 71.Fx 10.0 . 72.Sh AUTHORS 73.An -nosplit 74The 75.Nm 76driver and this manual page were written by 77.An Fabien Thomas Aq Mt fabient@FreeBSD.org . 78