.. SPDX-License-Identifier: GPL-2.0-or-later Kernel driver surface_fan ========================= Supported Devices: * Microsoft Surface Pro 9 Author: Ivor Wanders 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. ======================= ======= =========================================