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hwmon: Driver for Maxim MAX6639

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2-Channel Temperature Monitor with Dual PWM Fan-Speed Controller

Signed-off-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
This commit is contained in:
stigge@antcom.de
2011-01-20 18:42:55 +01:00
committed by Guenter Roeck
parent 521cb40b0c
commit a5b79d62f2
5 changed files with 713 additions and 0 deletions
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Kernel driver max6639
=====================
Supported chips:
* Maxim MAX6639
Prefix: 'max6639'
Addresses scanned: I2C 0x2c, 0x2e, 0x2f
Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6639.pdf
Authors:
He Changqing <hechangqing@semptian.com>
Roland Stigge <stigge@antcom.de>
Description
-----------
This driver implements support for the Maxim MAX6639. This chip is a 2-channel
temperature monitor with dual PWM fan speed controller. It can monitor its own
temperature and one external diode-connected transistor or two external
diode-connected transistors.
The following device attributes are implemented via sysfs:
Attribute R/W Contents
----------------------------------------------------------------------------
temp1_input R Temperature channel 1 input (0..150 C)
temp2_input R Temperature channel 2 input (0..150 C)
temp1_fault R Temperature channel 1 diode fault
temp2_fault R Temperature channel 2 diode fault
temp1_max RW Set THERM temperature for input 1
(in C, see datasheet)
temp2_max RW Set THERM temperature for input 2
temp1_crit RW Set ALERT temperature for input 1
temp2_crit RW Set ALERT temperature for input 2
temp1_emergency RW Set OT temperature for input 1
(in C, see datasheet)
temp2_emergency RW Set OT temperature for input 2
pwm1 RW Fan 1 target duty cycle (0..255)
pwm2 RW Fan 2 target duty cycle (0..255)
fan1_input R TACH1 fan tachometer input (in RPM)
fan2_input R TACH2 fan tachometer input (in RPM)
fan1_fault R Fan 1 fault
fan2_fault R Fan 2 fault
temp1_max_alarm R Alarm on THERM temperature on channel 1
temp2_max_alarm R Alarm on THERM temperature on channel 2
temp1_crit_alarm R Alarm on ALERT temperature on channel 1
temp2_crit_alarm R Alarm on ALERT temperature on channel 2
temp1_emergency_alarm R Alarm on OT temperature on channel 1
temp2_emergency_alarm R Alarm on OT temperature on channel 2