1.. SPDX-License-Identifier: GPL-2.0-or-later 2 3Kernel driver cros_ec_hwmon 4=========================== 5 6Supported chips: 7 8 * ChromeOS embedded controllers. 9 10 Prefix: 'cros_ec' 11 12 Addresses scanned: - 13 14Author: 15 16 - Thomas Weißschuh <linux@weissschuh.net> 17 18Description 19----------- 20 21This driver implements support for hardware monitoring commands exposed by the 22ChromeOS embedded controller used in Chromebooks and other devices. 23 24The channel labels exposed via hwmon are retrieved from the EC itself. 25 26Supported features 27------------------ 28 29Fan readings 30 Always supported. 31 32Fan target speed 33 If supported by the EC. 34 35Temperature readings 36 Always supported. 37 38Temperature thresholds 39 If supported by the EC. 40 41PWM fan control 42 If the EC also supports setting fan PWM values and fan mode. 43 44 Note that EC will switch fan control mode back to auto when suspended. 45 This driver will restore the fan state to what they were before suspended when resumed. 46 47 If a fan is controllable, this driver will register that fan as a cooling device 48 in the thermal framework as well. 49