From add77c64ca8b00dae5dc0a6be9eb89f1514d21ea Mon Sep 17 00:00:00 2001 From: Krzysztof Helt Date: Sun, 8 Jul 2007 22:43:00 +0200 Subject: hwmon: add support for THMC50 and ADM1022 This patch adds support for THMC50 and ADM1022 hardware monitoring chips. Signed-off-by: Krzysztof Helt Acked-by: Jean Delvare Signed-off-by: Mark M. Hoffman --- Documentation/hwmon/thmc50 | 74 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 Documentation/hwmon/thmc50 (limited to 'Documentation') diff --git a/Documentation/hwmon/thmc50 b/Documentation/hwmon/thmc50 new file mode 100644 index 00000000000..9639ca93d55 --- /dev/null +++ b/Documentation/hwmon/thmc50 @@ -0,0 +1,74 @@ +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://focus.ti.com/docs/prod/folders/print/thmc50.html + +Author: Krzysztof Helt + +This driver was derived from the 2.4 kernel thmc50.c source file. + +Credits: + thmc50.c (2.4 kernel): + Frodo Looijaard + Philip Edelbrock + +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. + -- cgit v1.2.3 From 517ef0d2a470c69b303c66694b0c45f31ff716cd Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Fri, 13 Jul 2007 14:29:41 +0200 Subject: hwmon: (adm1031) Fix broken links in documentation The Analog Devices chip information pages moved to a different location. Signed-off-by: Jean Delvare Signed-off-by: Mark M. Hoffman --- Documentation/hwmon/adm1031 | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'Documentation') diff --git a/Documentation/hwmon/adm1031 b/Documentation/hwmon/adm1031 index 130a38382b9..be92a77da1d 100644 --- a/Documentation/hwmon/adm1031 +++ b/Documentation/hwmon/adm1031 @@ -6,13 +6,13 @@ Supported chips: Prefix: 'adm1030' Addresses scanned: I2C 0x2c to 0x2e Datasheet: Publicly available at the Analog Devices website - http://products.analog.com/products/info.asp?product=ADM1030 + http://www.analog.com/en/prod/0%2C2877%2CADM1030%2C00.html * Analog Devices ADM1031 Prefix: 'adm1031' Addresses scanned: I2C 0x2c to 0x2e Datasheet: Publicly available at the Analog Devices website - http://products.analog.com/products/info.asp?product=ADM1031 + http://www.analog.com/en/prod/0%2C2877%2CADM1031%2C00.html Authors: Alexandre d'Alton -- cgit v1.2.3