pwdog(4)

pwdog4

Quancom pwdog1 watchdog timer device

Usage

pwdog0 at pci?

Overview

The pwdog driver provides support for Quancom PWDOG1 boards.

If the kernel crashes, the watchdog timer is not reset and the system will reboot (assuming a proper connection is made between the PWDOG1 and the motherboard). Alternatively, the watchdog can be reinitialized via a userland process which ensures that process scheduling, not just kernel timeout processing, is still taking place. See watchdog(4) and watchdogd(8) for more information.

The timeout period of the PWDOG1 card is set using DIP switches and cannot be changed by software.

Releases

41 releases since OpenBSD 4.1; the text changed 3 times.

  1. 4.1
  2. 4.2
  3. 4.3–5.3
  4. 5.4–8.0

History

The pwdog driver first appeared in OpenBSD 4.1.

Authors

The pwdog driver was written by Marc Balmer ⟨[email protected]⟩.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.