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Tip revision: 0c5b9b5d9adbad4b60491f9ba0d2af38904bb4b9 authored by Linus Torvalds on 21 January 2018, 21:51:26 UTC
Linux 4.15-rc9
Linux 4.15-rc9
Tip revision: 0c5b9b5
max31785
Kernel driver max31785
======================
Supported chips:
* Maxim MAX31785, MAX31785A
Prefix: 'max31785' or 'max31785a'
Addresses scanned: -
Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX31785.pdf
Author: Andrew Jeffery <andrew@aj.id.au>
Description
-----------
The Maxim MAX31785 is a PMBus device providing closed-loop, multi-channel fan
management with temperature and remote voltage sensing. Various fan control
features are provided, including PWM frequency control, temperature hysteresis,
dual tachometer measurements, and fan health monitoring.
For dual rotor fan configuration, the MAX31785 exposes the slowest rotor of the
two in the fan[1-4]_input attributes.
Usage Notes
-----------
This driver does not probe for PMBus devices. You will have to instantiate
devices explicitly.
Sysfs attributes
----------------
fan[1-4]_alarm Fan alarm.
fan[1-4]_fault Fan fault.
fan[1-4]_input Fan RPM.
in[1-6]_crit Critical maximum output voltage
in[1-6]_crit_alarm Output voltage critical high alarm
in[1-6]_input Measured output voltage
in[1-6]_label "vout[18-23]"
in[1-6]_lcrit Critical minimum output voltage
in[1-6]_lcrit_alarm Output voltage critical low alarm
in[1-6]_max Maximum output voltage
in[1-6]_max_alarm Output voltage high alarm
in[1-6]_min Minimum output voltage
in[1-6]_min_alarm Output voltage low alarm
temp[1-11]_crit Critical high temperature
temp[1-11]_crit_alarm Chip temperature critical high alarm
temp[1-11]_input Measured temperature
temp[1-11]_max Maximum temperature
temp[1-11]_max_alarm Chip temperature high alarm