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.. SPDX-License-Identifier: GPL-2.0-or-later
Kernel driver qnap-mcu-hwmon
============================
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 <heiko@sntech.de>
Description
-----------
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
=============== ======= =======================================================
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