Documentation/hwmon/qnap-mcu-hwmon.rst
.. SPDX-License-Identifier: GPL-2.0-or-later
This driver enables the use of the hardware monitoring and fan control of the MCU used on some QNAP network attached storage devices.
Author: Heiko Stuebner [email protected]
The driver implements a simple interface for driving the fan controlled by setting its PWM output value and exposes the fan rpm and case-temperature to user space through hwmon's sysfs interface.
The fan rotation speed returned via the optional 'fan1_input' is calculated inside the MCU device.
The driver provides the following sensor accesses in sysfs:
=============== ======= ======================================================= fan1_input ro fan tachometer speed in RPM pwm1 rw relative speed (0-255), 255=max. speed. temp1_input ro Measured temperature in millicelsius =============== ======= =======================================================