Kernel driver max31790¶
Addresses scanned: -
Author: Il Han <firstname.lastname@example.org>
This driver implements support for the Maxim MAX31790 chip.
The MAX31790 controls the speeds of up to six fans using six independent PWM outputs. The desired fan speeds (or PWM duty cycles) are written through the I2C interface. The outputs drive “4-wire” fans directly, or can be used to modulate the fan’s power terminals using an external pass transistor.
Tachometer inputs monitor fan tachometer logic outputs for precise (+/-1%) monitoring and control of fan RPM as well as detection of fan failure. Six pins are dedicated tachometer inputs. Any of the six PWM outputs can also be configured to serve as tachometer inputs.
|fan[1-12]_input||RO||fan tachometer speed in RPM|
|fan[1-12]_fault||RO||fan experienced fault|
|fan[1-6]_target||RW||desired fan speed in RPM|
|fan[1-6]_enable||RW||enable or disable the tachometer input|
|pwm[1-6]_enable||RW||regulator mode, 0=disabled (duty cycle=0%), 1=manual mode, 2=rpm mode|
|pwm[1-6]||RW||read: current pwm duty cycle, write: target pwm duty cycle (0-255)|