Kernel driver axiado-pwm-fan

Supported chips:

  • Axiado AX3000

  • Axiado AX3005

    Datasheet: Not publicly available

Author:

Description

The Axiado AX3000 and AX3005 PWM fan controllers measure the rotational speed of one fan using a hardware tachometer block. Fan speed is controlled through a PWM signal supplied by an external PWM controller.

The number of tachometer pulses generated per fan revolution is configured through the pulses-per-revolution devicetree property. If the property is not specified, the driver uses two pulses per revolution.

Sysfs attributes

The driver provides the following standard hwmon attributes:

fan1_input

RO

Fan speed in revolutions per minute (RPM).

pwm1

RW

Relative PWM control value from 0 to 255. A value of 255 selects the maximum PWM duty cycle.