0ea6e61122
Below you will find an updated version from the original series bunching all patches into one big patch updating broken web addresses that are located in Documentation/* Some of the addresses date as far far back as 1995 etc... so searching became a bit difficult, the best way to deal with these is to use web.archive.org to locate these addresses that are outdated. Now there are also some addresses pointing to .spec files some are located, but some(after searching on the companies site)where still no where to be found. In this case I just changed the address to the company site this way the users can contact the company and they can locate them for the users. Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Thomas Weber <weber@corscience.de> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Cc: Paulo Marques <pmarques@grupopie.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Michael Neuling <mikey@neuling.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2.6 KiB
Kernel driver thmc50
Supported chips:
- Analog Devices ADM1022 Prefix: 'adm1022' Addresses scanned: I2C 0x2c - 0x2e Datasheet: http://www.analog.com/en/prod/0,2877,ADM1022,00.html
- Texas Instruments THMC50 Prefix: 'thmc50' Addresses scanned: I2C 0x2c - 0x2e Datasheet: http://www.ti.com/
Author: Krzysztof Helt krzysztof.h1@wp.pl
This driver was derived from the 2.4 kernel thmc50.c source file.
Credits: thmc50.c (2.4 kernel): Frodo Looijaard frodol@dds.nl Philip Edelbrock phil@netroedge.com
Module Parameters
- adm1022_temp3: short array List of adapter,address pairs to force chips into ADM1022 mode with second remote temperature. This does not work for original THMC50 chips.
Description
The THMC50 implements: an internal temperature sensor, support for an external diode-type temperature sensor (compatible w/ the diode sensor inside many processors), and a controllable fan/analog_out DAC. For the temperature sensors, limits can be set through the appropriate Overtemperature Shutdown register and Hysteresis register. Each value can be set and read to half-degree accuracy. An alarm is issued (usually to a connected LM78) when the temperature gets higher then the Overtemperature Shutdown value; it stays on until the temperature falls below the Hysteresis value. All temperatures are in degrees Celsius, and are guaranteed within a range of -55 to +125 degrees.
The THMC50 only updates its values each 1.5 seconds; reading it more often will do no harm, but will return 'old' values.
The THMC50 is usually used in combination with LM78-like chips, to measure the temperature of the processor(s).
The ADM1022 works the same as THMC50 but it is faster (5 Hz instead of 1 Hz for THMC50). It can be also put in a new mode to handle additional remote temperature sensor. The driver use the mode set by BIOS by default.
In case the BIOS is broken and the mode is set incorrectly, you can force the mode with additional remote temperature with adm1022_temp3 parameter. A typical symptom of wrong setting is a fan forced to full speed.
Driver Features
The driver provides up to three temperatures:
temp1 -- internal temp2 -- remote temp3 -- 2nd remote only for ADM1022
pwm1 -- fan speed (0 = stop, 255 = full) pwm1_mode -- always 0 (DC mode)
The value of 0 for pwm1 also forces FAN_OFF signal from the chip, so it stops fans even if the value 0 into the ANALOG_OUT register does not.
The driver was tested on Compaq AP550 with two ADM1022 chips (one works in the temp3 mode), five temperature readings and two fans.