1Kernel driver max6639 2===================== 3 4Supported 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 14Authors: 15 - He Changqing <hechangqing@semptian.com> 16 - Roland Stigge <stigge@antcom.de> 17 18Description 19----------- 20 21This driver implements support for the Maxim MAX6639. This chip is a 2-channel 22temperature monitor with dual PWM fan speed controller. It can monitor its own 23temperature and one external diode-connected transistor or two external 24diode-connected transistors. 25 26The following device attributes are implemented via sysfs: 27 28====================== ==== =================================================== 29Attribute R/W Contents 30====================== ==== =================================================== 31temp1_input R Temperature channel 1 input (0..150 C) 32temp2_input R Temperature channel 2 input (0..150 C) 33temp1_fault R Temperature channel 1 diode fault 34temp2_fault R Temperature channel 2 diode fault 35temp1_max RW Set THERM temperature for input 1 36 (in C, see datasheet) 37temp2_max RW Set THERM temperature for input 2 38temp1_crit RW Set ALERT temperature for input 1 39temp2_crit RW Set ALERT temperature for input 2 40temp1_emergency RW Set OT temperature for input 1 41 (in C, see datasheet) 42temp2_emergency RW Set OT temperature for input 2 43pwm1 RW Fan 1 target duty cycle (0..255) 44pwm2 RW Fan 2 target duty cycle (0..255) 45fan1_input R TACH1 fan tachometer input (in RPM) 46fan2_input R TACH2 fan tachometer input (in RPM) 47fan1_fault R Fan 1 fault 48fan2_fault R Fan 2 fault 49temp1_max_alarm R Alarm on THERM temperature on channel 1 50temp2_max_alarm R Alarm on THERM temperature on channel 2 51temp1_crit_alarm R Alarm on ALERT temperature on channel 1 52temp2_crit_alarm R Alarm on ALERT temperature on channel 2 53temp1_emergency_alarm R Alarm on OT temperature on channel 1 54temp2_emergency_alarm R Alarm on OT temperature on channel 2 55====================== ==== =================================================== 56