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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
====================== ==== ===================================================
