| .. 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 |
| =============== ======= ======================================================= |
