diff options
| author | Heiko Stuebner <heiko@sntech.de> | 2024-11-07 12:47:10 +0100 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2024-12-17 13:14:48 +0000 |
| commit | 9855caf5d4eb1d8b8bba60be256186ea8e0f907c (patch) | |
| tree | 81ac1e2a272b184e6f480a1cd95e738ea19dedca /Documentation/hwmon | |
| parent | bb7e361191564cbd77f5cfc0f49213d9e799ff10 (diff) | |
hwmon: add driver for the hwmon parts of qnap-mcu devices
The MCU can be found on network-attached-storage devices made by QNAP
and provides access to fan control including reading back its RPM as
well as reading the temperature of the NAS case.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20241107114712.538976-8-heiko@sntech.de
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/index.rst | 1 | ||||
| -rw-r--r-- | Documentation/hwmon/qnap-mcu-hwmon.rst | 27 |
2 files changed, 28 insertions, 0 deletions
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 55f1111594b2..d96fd542aab2 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -201,6 +201,7 @@ Hardware Monitoring Kernel Drivers pxe1610 pwm-fan q54sj108a2 + qnap-mcu-hwmon raspberrypi-hwmon sbrmi sbtsi_temp diff --git a/Documentation/hwmon/qnap-mcu-hwmon.rst b/Documentation/hwmon/qnap-mcu-hwmon.rst new file mode 100644 index 000000000000..83407e3408f2 --- /dev/null +++ b/Documentation/hwmon/qnap-mcu-hwmon.rst @@ -0,0 +1,27 @@ +.. 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 +=============== ======= ======================================================= |