1.. SPDX-License-Identifier: GPL-2.0-or-later 2 3Kernel driver asus_ec_sensors 4================================= 5 6Supported boards: 7 * PRIME X470-PRO 8 * PRIME X570-PRO 9 * Pro WS X570-ACE 10 * ProArt X570-CREATOR WIFI 11 * ProArt X670E-CREATOR WIFI 12 * ProArt B550-CREATOR 13 * ROG CROSSHAIR VIII DARK HERO 14 * ROG CROSSHAIR VIII HERO (WI-FI) 15 * ROG CROSSHAIR VIII FORMULA 16 * ROG CROSSHAIR VIII HERO 17 * ROG CROSSHAIR VIII IMPACT 18 * ROG CROSSHAIR X670E HERO 19 * ROG CROSSHAIR X670E GENE 20 * ROG MAXIMUS XI HERO 21 * ROG MAXIMUS XI HERO (WI-FI) 22 * ROG STRIX B550-E GAMING 23 * ROG STRIX B550-I GAMING 24 * ROG STRIX X570-E GAMING 25 * ROG STRIX X570-E GAMING WIFI II 26 * ROG STRIX X570-F GAMING 27 * ROG STRIX X570-I GAMING 28 * ROG STRIX Z390-F GAMING 29 * ROG STRIX Z690-A GAMING WIFI D4 30 * ROG ZENITH II EXTREME 31 * ROG ZENITH II EXTREME ALPHA 32 33Authors: 34 - Eugene Shalygin <eugene.shalygin@gmail.com> 35 36Description: 37------------ 38ASUS mainboards publish hardware monitoring information via Super I/O 39chip and the ACPI embedded controller (EC) registers. Some of the sensors 40are only available via the EC. 41 42The driver is aware of and reads the following sensors: 43 441. Chipset (PCH) temperature 452. CPU package temperature 463. Motherboard temperature 474. Readings from the T_Sensor header 485. VRM temperature 496. CPU_Opt fan RPM 507. VRM heatsink fan RPM 518. Chipset fan RPM 529. Readings from the "Water flow meter" header (RPM) 5310. Readings from the "Water In" and "Water Out" temperature headers 5411. CPU current 5512. CPU core voltage 56 57Sensor values are read from EC registers, and to avoid race with the board 58firmware the driver acquires ACPI mutex, the one used by the WMI when its 59methods access the EC. 60 61Module Parameters 62----------------- 63 * mutex_path: string 64 The driver holds path to the ACPI mutex for each board (actually, 65 the path is mostly identical for them). If ASUS changes this path 66 in a future BIOS update, this parameter can be used to override 67 the stored in the driver value until it gets updated. 68 A special string ":GLOBAL_LOCK" can be passed to use the ACPI 69 global lock instead of a dedicated mutex. 70