| 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 |
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