a5b79d62 |
1 | Kernel driver max6639 |
2 | ===================== |
3 | |
4 | Supported chips: |
5 | * Maxim MAX6639 |
6 | Prefix: 'max6639' |
7 | Addresses scanned: I2C 0x2c, 0x2e, 0x2f |
8 | Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6639.pdf |
9 | |
10 | Authors: |
11 | He Changqing <hechangqing@semptian.com> |
12 | Roland Stigge <stigge@antcom.de> |
13 | |
14 | Description |
15 | ----------- |
16 | |
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. |
21 | |
22 | The following device attributes are implemented via sysfs: |
23 | |
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 |
31 | (in C, see datasheet) |
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 |
36 | (in C, see datasheet) |
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 |