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