1Kernel driver max6639
2=====================
3
4Supported chips:
5
6  * Maxim MAX6639
7
8    Prefix: 'max6639'
9
10    Addresses scanned: I2C 0x2c, 0x2e, 0x2f
11
12    Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX6639-MAX6639F.pdf
13
14Authors:
15    - He Changqing <hechangqing@semptian.com>
16    - Roland Stigge <stigge@antcom.de>
17
18Description
19-----------
20
21This driver implements support for the Maxim MAX6639. This chip is a 2-channel
22temperature monitor with dual PWM fan speed controller. It can monitor its own
23temperature and one external diode-connected transistor or two external
24diode-connected transistors.
25
26The following device attributes are implemented via sysfs:
27
28====================== ==== ===================================================
29Attribute              R/W  Contents
30====================== ==== ===================================================
31temp1_input            R    Temperature channel 1 input (0..150 C)
32temp2_input            R    Temperature channel 2 input (0..150 C)
33temp1_fault            R    Temperature channel 1 diode fault
34temp2_fault            R    Temperature channel 2 diode fault
35temp1_max              RW   Set THERM temperature for input 1
36			    (in C, see datasheet)
37temp2_max              RW   Set THERM temperature for input 2
38temp1_crit             RW   Set ALERT temperature for input 1
39temp2_crit             RW   Set ALERT temperature for input 2
40temp1_emergency        RW   Set OT temperature for input 1
41			    (in C, see datasheet)
42temp2_emergency        RW   Set OT temperature for input 2
43pwm1                   RW   Fan 1 target duty cycle (0..255)
44pwm2                   RW   Fan 2 target duty cycle (0..255)
45fan1_input             R    TACH1 fan tachometer input (in RPM)
46fan2_input             R    TACH2 fan tachometer input (in RPM)
47fan1_fault             R    Fan 1 fault
48fan2_fault             R    Fan 2 fault
49temp1_max_alarm        R    Alarm on THERM temperature on channel 1
50temp2_max_alarm        R    Alarm on THERM temperature on channel 2
51temp1_crit_alarm       R    Alarm on ALERT temperature on channel 1
52temp2_crit_alarm       R    Alarm on ALERT temperature on channel 2
53temp1_emergency_alarm  R    Alarm on OT temperature on channel 1
54temp2_emergency_alarm  R    Alarm on OT temperature on channel 2
55====================== ==== ===================================================
56