Based on kernel version 4.16.1. Page generated on 2018-04-09 11:53 EST.
1 Kernel driver max31785 2 ====================== 3 4 Supported chips: 5 * Maxim MAX31785, MAX31785A 6 Prefix: 'max31785' or 'max31785a' 7 Addresses scanned: - 8 Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX31785.pdf 9 10 Author: Andrew Jeffery <andrew@aj.id.au> 11 12 Description 13 ----------- 14 15 The Maxim MAX31785 is a PMBus device providing closed-loop, multi-channel fan 16 management with temperature and remote voltage sensing. Various fan control 17 features are provided, including PWM frequency control, temperature hysteresis, 18 dual tachometer measurements, and fan health monitoring. 19 20 For dual-rotor configurations the MAX31785A exposes the second rotor tachometer 21 readings in attributes fan[5-8]_input. By contrast the MAX31785 only exposes 22 the slowest rotor measurement, and does so in the fan[1-4]_input attributes. 23 24 Usage Notes 25 ----------- 26 27 This driver does not probe for PMBus devices. You will have to instantiate 28 devices explicitly. 29 30 Sysfs attributes 31 ---------------- 32 33 fan[1-4]_alarm Fan alarm. 34 fan[1-4]_fault Fan fault. 35 fan[1-8]_input Fan RPM. On the MAX31785A, inputs 5-8 correspond to the 36 second rotor of fans 1-4 37 fan[1-4]_target Fan input target 38 39 in[1-6]_crit Critical maximum output voltage 40 in[1-6]_crit_alarm Output voltage critical high alarm 41 in[1-6]_input Measured output voltage 42 in[1-6]_label "vout[18-23]" 43 in[1-6]_lcrit Critical minimum output voltage 44 in[1-6]_lcrit_alarm Output voltage critical low alarm 45 in[1-6]_max Maximum output voltage 46 in[1-6]_max_alarm Output voltage high alarm 47 in[1-6]_min Minimum output voltage 48 in[1-6]_min_alarm Output voltage low alarm 49 50 pwm[1-4] Fan target duty cycle (0..255) 51 pwm[1-4]_enable 0: Full-speed 52 1: Manual PWM control 53 2: Automatic PWM (tach-feedback RPM fan-control) 54 3: Automatic closed-loop (temp-feedback fan-control) 55 56 temp[1-11]_crit Critical high temperature 57 temp[1-11]_crit_alarm Chip temperature critical high alarm 58 temp[1-11]_input Measured temperature 59 temp[1-11]_max Maximum temperature 60 temp[1-11]_max_alarm Chip temperature high alarm