1.\" $OpenBSD: pwdog.4,v 1.7 2013/07/16 16:05:49 schwarze Exp $ 2.\" 3.\" Copyright (c) 2006 Marc Balmer <mbalmer@openbsd.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: July 16 2013 $ 18.Dt PWDOG 4 19.Os 20.Sh NAME 21.Nm pwdog 22.Nd Quancom PWDOG1 watchdog timer device 23.Sh SYNOPSIS 24.Cd "pwdog0 at pci?" 25.Sh DESCRIPTION 26The 27.Nm 28driver provides support for Quancom PWDOG1 boards. 29.Pp 30If the kernel crashes, the watchdog timer is not reset and the system will 31reboot (assuming a proper connection is made between the PWDOG1 and 32the motherboard). 33Alternatively, the watchdog can be reinitialized via a userland process which 34ensures that process scheduling, not just kernel timeout processing, is still 35taking place. 36See 37.Xr watchdog 4 38and 39.Xr watchdogd 8 40for more information. 41.Pp 42The timeout period of the PWDOG1 card is set using DIP switches and cannot 43be changed by software. 44.Sh SEE ALSO 45.Xr intro 4 , 46.Xr pci 4 , 47.Xr watchdog 4 , 48.Xr watchdogd 8 49.Sh HISTORY 50The 51.Nm 52driver first appeared in 53.Ox 4.1 . 54.Sh AUTHORS 55The 56.Nm 57driver was written by 58.An Marc Balmer Aq Mt mbalmer@openbsd.org . 59