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1Kernel driver max317852======================3 4Supported chips:5 6 * Maxim MAX31785, MAX31785A7 8 Prefix: 'max31785' or 'max31785a'9 10 Addresses scanned: -11 12 Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX31785.pdf13 14Author: Andrew Jeffery <andrew@aj.id.au>15 16Description17-----------18 19The Maxim MAX31785 is a PMBus device providing closed-loop, multi-channel fan20management with temperature and remote voltage sensing. Various fan control21features are provided, including PWM frequency control, temperature hysteresis,22dual tachometer measurements, and fan health monitoring.23 24For dual-rotor configurations the MAX31785A exposes the second rotor tachometer25readings in attributes fan[5-8]_input. By contrast the MAX31785 only exposes26the slowest rotor measurement, and does so in the fan[1-4]_input attributes.27 28Usage Notes29-----------30 31This driver does not probe for PMBus devices. You will have to instantiate32devices explicitly.33 34Sysfs attributes35----------------36 37======================= =======================================================38fan[1-4]_alarm Fan alarm.39fan[1-4]_fault Fan fault.40fan[1-8]_input Fan RPM. On the MAX31785A, inputs 5-8 correspond to the41 second rotor of fans 1-442fan[1-4]_target Fan input target43 44in[1-6]_crit Critical maximum output voltage45in[1-6]_crit_alarm Output voltage critical high alarm46in[1-6]_input Measured output voltage47in[1-6]_label "vout[18-23]"48in[1-6]_lcrit Critical minimum output voltage49in[1-6]_lcrit_alarm Output voltage critical low alarm50in[1-6]_max Maximum output voltage51in[1-6]_max_alarm Output voltage high alarm52in[1-6]_min Minimum output voltage53in[1-6]_min_alarm Output voltage low alarm54 55pwm[1-4] Fan target duty cycle (0..255)56pwm[1-4]_enable 0: Full-speed57 1: Manual PWM control58 2: Automatic PWM (tach-feedback RPM fan-control)59 3: Automatic closed-loop (temp-feedback fan-control)60 61temp[1-11]_crit Critical high temperature62temp[1-11]_crit_alarm Chip temperature critical high alarm63temp[1-11]_input Measured temperature64temp[1-11]_max Maximum temperature65temp[1-11]_max_alarm Chip temperature high alarm66======================= =======================================================67