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original_kernel/Documentation/hwmon/surface_fan.rst

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hwmon: add fan speed monitoring driver for Surface devices Adds a driver that provides read only access to the fan speed for Microsoft Surface Pro devices. The fan speed is always regulated by the EC and cannot be influenced directly. Signed-off-by: Ivor Wanders <ivor@iwanders.net> Link: https://github.com/linux-surface/kernel/pull/144 Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com> Reviewed-by: Armin Wolf <W_Armin@gmx.de> Link: https://lore.kernel.org/r/20240131005856.10180-2-ivor@iwanders.net [groeck: - Declare surface_fan_hwmon_is_visible() static - Add dependency on SURFACE_AGGREGATOR_BUS ] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2024-01-31 08:58:55 +08:00
.. SPDX-License-Identifier: GPL-2.0-or-later
Kernel driver surface_fan
=========================
Supported Devices:
* Microsoft Surface Pro 9
Author: Ivor Wanders <ivor@iwanders.net>
Description
-----------
This provides monitoring of the fan found in some Microsoft Surface Pro devices,
like the Surface Pro 9. The fan is always controlled by the onboard controller.
Sysfs interface
---------------
======================= ======= =========================================
Name Perm Description
======================= ======= =========================================
``fan1_input`` RO Current fan speed in RPM.
======================= ======= =========================================