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>
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 |