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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
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