2006-12-12 12:18:29 -05:00
|
|
|
Kernel driver pc87427
|
|
|
|
|
=====================
|
|
|
|
|
|
|
|
|
|
Supported chips:
|
|
|
|
|
* National Semiconductor PC87427
|
|
|
|
|
Prefix: 'pc87427'
|
|
|
|
|
Addresses scanned: none, address read from Super I/O config space
|
2008-10-17 11:51:17 -04:00
|
|
|
Datasheet: No longer available
|
2006-12-12 12:18:29 -05:00
|
|
|
|
|
|
|
|
Author: Jean Delvare <khali@linux-fr.org>
|
|
|
|
|
|
|
|
|
|
Thanks to Amir Habibi at Candelis for setting up a test system, and to
|
|
|
|
|
Michael Kress for testing several iterations of this driver.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Description
|
|
|
|
|
-----------
|
|
|
|
|
|
|
|
|
|
The National Semiconductor Super I/O chip includes complete hardware
|
|
|
|
|
monitoring capabilities. It can monitor up to 18 voltages, 8 fans and
|
|
|
|
|
6 temperature sensors. Only the fans are supported at the moment.
|
|
|
|
|
|
|
|
|
|
This chip also has fan controlling features, which are not yet supported
|
|
|
|
|
by this driver either.
|
|
|
|
|
|
|
|
|
|
The driver assumes that no more than one chip is present, which seems
|
|
|
|
|
reasonable.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Fan Monitoring
|
|
|
|
|
--------------
|
|
|
|
|
|
|
|
|
|
Fan rotation speeds are reported as 14-bit values from a gated clock
|
|
|
|
|
signal. Speeds down to 83 RPM can be measured.
|
|
|
|
|
|
|
|
|
|
An alarm is triggered if the rotation speed drops below a programmable
|
|
|
|
|
limit. Another alarm is triggered if the speed is too low to to be measured
|
|
|
|
|
(including stalled or missing fan).
|
