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Instituto Argentino de Radioastronomía Observatorio Astronómico de La Plata Aguante Linux

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ALi M6117 Watchdog timer driver for Linux 2.4.x

(c) Copyright 2003 Federico Bareilles <fede@fcaglp.unlp.edu.ar>, Instituto Argentino de Radio Astronomia (IAR).

This program is free software that you can redistribute and/or modify under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

Theory of operation:

A Watchdog Timer (WDT) is a hardware circuit that can reset the computer system in case of a software fault. You probably knew that already.

ALi (Acer Labs) M6117 watchdog timer uses a 32.768KHz clock to a 24 bits counter. The timer range is from 30.5u sec to 512 sec with resolution 30.5u sec. When the timer times out, a system reset, NMI or IRQ may happen. This can be decided by user's programming.

The watchdog timer is located on the chipset M6117. This chip is used on some SBC and PC/104 (i386) motherboards.

The driver

This driver have been written according to "The Linux Watchdog driver API" by Christer Weingel <wingel@nano-system.com>. You can find it in: http://www.iar.unlp.edu.ar/~fede/pub/kernel/alim6117_wdt.tgz

Please, send me any comments if you test this module.

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Federico Bareilles: fede@iar.unlp.edu.ar [20/04/2016]