1.\" $NetBSD: pwdog.4,v 1.4 2014/03/18 18:20:39 riastradh Exp $ 2.\" $OpenBSD: pwdog.4,v 1.6 2007/12/23 22:16:39 jmc Exp $ 3.\" 4.\" Copyright (c) 2011 Marc Balmer <mbalmer@NetBSD.org> 5.\" Copyright (c) 2006 Marc Balmer <marc@msys.ch> 6.\" 7.\" Permission to use, copy, modify, and distribute this software for any 8.\" purpose with or without fee is hereby granted, provided that the above 9.\" copyright notice and this permission notice appear in all copies. 10.\" 11.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18.\" 19.Dd August 11, 2011 20.Dt PWDOG 4 21.Os 22.Sh NAME 23.Nm pwdog 24.Nd Quancom PWDOG1 watchdog timer device 25.Sh SYNOPSIS 26.Cd "pwdog0 at pci?" 27.Sh DESCRIPTION 28The 29.Nm 30driver provides support for Quancom PWDOG1 boards. 31.Pp 32If the kernel crashes, the watchdog timer is not reset and the system will 33reboot (assuming a proper connection is made between the PWDOG1 and 34the motherboard). 35Alternatively, the watchdog can be reinitialized via a userland process which 36ensures that process scheduling, not just kernel timeout processing, is still 37taking place. 38.Pp 39The timeout period of the PWDOG1 card is set using DIP switches and cannot 40be changed by software. 41.Sh SEE ALSO 42.Xr intro 4 , 43.Xr pci 4 44.Sh HISTORY 45The 46.Nm 47driver first appeared in 48.Ox 4.1 49and 50.Nx 6.0 . 51.Sh AUTHORS 52The 53.Nm 54driver was written by 55.An Marc Balmer Aq Mt mbalmer@NetBSD.org . 56