Kernel driver max6639¶
Supported chips:
Maxim MAX6639
Prefix: ‘max6639’
Addresses scanned: I2C 0x2c, 0x2e, 0x2f
Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX6639-MAX6639F.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 |