7 Addresses scanned: I2C 0x2c, 0x2e, 0x2f
8 Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6639.pdf
11 He Changqing <hechangqing@semptian.com>
12 Roland Stigge <stigge@antcom.de>
17 This driver implements support for the Maxim MAX6639. This chip is a 2-channel
18 temperature monitor with dual PWM fan speed controller. It can monitor its own
19 temperature and one external diode-connected transistor or two external
20 diode-connected transistors.
22 The following device attributes are implemented via sysfs:
24 Attribute R/W Contents
25 ----------------------------------------------------------------------------
26 temp1_input R Temperature channel 1 input (0..150 C)
27 temp2_input R Temperature channel 2 input (0..150 C)
28 temp1_fault R Temperature channel 1 diode fault
29 temp2_fault R Temperature channel 2 diode fault
30 temp1_max RW Set THERM temperature for input 1
32 temp2_max RW Set THERM temperature for input 2
33 temp1_crit RW Set ALERT temperature for input 1
34 temp2_crit RW Set ALERT temperature for input 2
35 temp1_emergency RW Set OT temperature for input 1
37 temp2_emergency RW Set OT temperature for input 2
38 pwm1 RW Fan 1 target duty cycle (0..255)
39 pwm2 RW Fan 2 target duty cycle (0..255)
40 fan1_input R TACH1 fan tachometer input (in RPM)
41 fan2_input R TACH2 fan tachometer input (in RPM)
42 fan1_fault R Fan 1 fault
43 fan2_fault R Fan 2 fault
44 temp1_max_alarm R Alarm on THERM temperature on channel 1
45 temp2_max_alarm R Alarm on THERM temperature on channel 2
46 temp1_crit_alarm R Alarm on ALERT temperature on channel 1
47 temp2_crit_alarm R Alarm on ALERT temperature on channel 2
48 temp1_emergency_alarm R Alarm on OT temperature on channel 1
49 temp2_emergency_alarm R Alarm on OT temperature on channel 2