| Kernel driver max6639 | |
| ===================== | |
| Supported chips: | |
| * Maxim MAX6639 | |
| Prefix: 'max6639' | |
| Addresses scanned: I2C 0x2c, 0x2e, 0x2f | |
| Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max6639-max6639f.pdf | |
| Authors: | |
| - He Changqing <hechangqing@semptian.com> | |
| - Roland Stigge <stigge@antcom.de> | |
| Description | |
| ----------- | |
| This driver implements support for the Maxim MAX6639. This chip is a 2-channel | |
| temperature monitor with dual PWM fan speed controller. It can monitor its own | |
| temperature and one external diode-connected transistor or two external | |
| diode-connected transistors. | |
| The following device attributes are implemented via sysfs: | |
| ====================== ==== =================================================== | |
| Attribute R/W Contents | |
| ====================== ==== =================================================== | |
| temp1_input R Temperature channel 1 input (0..150 C) | |
| temp2_input R Temperature channel 2 input (0..150 C) | |
| temp1_fault R Temperature channel 1 diode fault | |
| temp2_fault R Temperature channel 2 diode fault | |
| temp1_max RW Set THERM temperature for input 1 | |
| (in C, see datasheet) | |
| temp2_max RW Set THERM temperature for input 2 | |
| temp1_crit RW Set ALERT temperature for input 1 | |
| temp2_crit RW Set ALERT temperature for input 2 | |
| temp1_emergency RW Set OT temperature for input 1 | |
| (in C, see datasheet) | |
| temp2_emergency RW Set OT temperature for input 2 | |
| pwm1 RW Fan 1 target duty cycle (0..255) | |
| pwm2 RW Fan 2 target duty cycle (0..255) | |
| fan1_input R TACH1 fan tachometer input (in RPM) | |
| fan2_input R TACH2 fan tachometer input (in RPM) | |
| fan1_fault R Fan 1 fault | |
| fan2_fault R Fan 2 fault | |
| temp1_max_alarm R Alarm on THERM temperature on channel 1 | |
| temp2_max_alarm R Alarm on THERM temperature on channel 2 | |
| temp1_crit_alarm R Alarm on ALERT temperature on channel 1 | |
| temp2_crit_alarm R Alarm on ALERT temperature on channel 2 | |
| temp1_emergency_alarm R Alarm on OT temperature on channel 1 | |
| temp2_emergency_alarm R Alarm on OT temperature on channel 2 | |
| ====================== ==== =================================================== |