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1.. SPDX-License-Identifier: GPL-2.0-or-later2 3Kernel driver surface_fan4=========================5 6Supported Devices:7 8 * Microsoft Surface Pro 99 10Author: Ivor Wanders <ivor@iwanders.net>11 12Description13-----------14 15This provides monitoring of the fan found in some Microsoft Surface Pro devices,16like the Surface Pro 9. The fan is always controlled by the onboard controller.17 18Sysfs interface19---------------20 21======================= ======= =========================================22Name Perm Description23======================= ======= =========================================24``fan1_input`` RO Current fan speed in RPM.25======================= ======= =========================================26