Kernel driver max6639

Supported chips:

Authors:

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