1 Kernel driver max6639 1 Kernel driver max6639
2 ===================== 2 =====================
3 3
4 Supported chips: 4 Supported chips:
5 5
6 * Maxim MAX6639 6 * Maxim MAX6639
7 7
8 Prefix: 'max6639' 8 Prefix: 'max6639'
9 9
10 Addresses scanned: I2C 0x2c, 0x2e, 0x2f 10 Addresses scanned: I2C 0x2c, 0x2e, 0x2f
11 11
12 Datasheet: https://datasheets.maximintegra 12 Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX6639-MAX6639F.pdf
13 13
14 Authors: 14 Authors:
15 - He Changqing <hechangqing@semptian.com> 15 - He Changqing <hechangqing@semptian.com>
16 - Roland Stigge <stigge@antcom.de> 16 - Roland Stigge <stigge@antcom.de>
17 17
18 Description 18 Description
19 ----------- 19 -----------
20 20
21 This driver implements support for the Maxim M 21 This driver implements support for the Maxim MAX6639. This chip is a 2-channel
22 temperature monitor with dual PWM fan speed co 22 temperature monitor with dual PWM fan speed controller. It can monitor its own
23 temperature and one external diode-connected t 23 temperature and one external diode-connected transistor or two external
24 diode-connected transistors. 24 diode-connected transistors.
25 25
26 The following device attributes are implemente 26 The following device attributes are implemented via sysfs:
27 27
28 ====================== ==== ================== 28 ====================== ==== ===================================================
29 Attribute R/W Contents 29 Attribute R/W Contents
30 ====================== ==== ================== 30 ====================== ==== ===================================================
31 temp1_input R Temperature channe 31 temp1_input R Temperature channel 1 input (0..150 C)
32 temp2_input R Temperature channe 32 temp2_input R Temperature channel 2 input (0..150 C)
33 temp1_fault R Temperature channe 33 temp1_fault R Temperature channel 1 diode fault
34 temp2_fault R Temperature channe 34 temp2_fault R Temperature channel 2 diode fault
35 temp1_max RW Set THERM temperat 35 temp1_max RW Set THERM temperature for input 1
36 (in C, see datashe 36 (in C, see datasheet)
37 temp2_max RW Set THERM temperat 37 temp2_max RW Set THERM temperature for input 2
38 temp1_crit RW Set ALERT temperat 38 temp1_crit RW Set ALERT temperature for input 1
39 temp2_crit RW Set ALERT temperat 39 temp2_crit RW Set ALERT temperature for input 2
40 temp1_emergency RW Set OT temperature 40 temp1_emergency RW Set OT temperature for input 1
41 (in C, see datashe 41 (in C, see datasheet)
42 temp2_emergency RW Set OT temperature 42 temp2_emergency RW Set OT temperature for input 2
43 pwm1 RW Fan 1 target duty 43 pwm1 RW Fan 1 target duty cycle (0..255)
44 pwm2 RW Fan 2 target duty 44 pwm2 RW Fan 2 target duty cycle (0..255)
45 fan1_input R TACH1 fan tachomet 45 fan1_input R TACH1 fan tachometer input (in RPM)
46 fan2_input R TACH2 fan tachomet 46 fan2_input R TACH2 fan tachometer input (in RPM)
47 fan1_fault R Fan 1 fault 47 fan1_fault R Fan 1 fault
48 fan2_fault R Fan 2 fault 48 fan2_fault R Fan 2 fault
49 temp1_max_alarm R Alarm on THERM tem 49 temp1_max_alarm R Alarm on THERM temperature on channel 1
50 temp2_max_alarm R Alarm on THERM tem 50 temp2_max_alarm R Alarm on THERM temperature on channel 2
51 temp1_crit_alarm R Alarm on ALERT tem 51 temp1_crit_alarm R Alarm on ALERT temperature on channel 1
52 temp2_crit_alarm R Alarm on ALERT tem 52 temp2_crit_alarm R Alarm on ALERT temperature on channel 2
53 temp1_emergency_alarm R Alarm on OT temper 53 temp1_emergency_alarm R Alarm on OT temperature on channel 1
54 temp2_emergency_alarm R Alarm on OT temper 54 temp2_emergency_alarm R Alarm on OT temperature on channel 2
55 ====================== ==== ================== 55 ====================== ==== ===================================================
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