Linux Driver for WMI on Gigabyte Mainboards

This driver is now part of the Linux mainline kernel. This repository is only for historical reference. All development happens upstream

Tested with

• X570 I Aorus Pro Wifi (rev 1.0)
• B550M DS3H
• B550 Gaming X V2 (rev.1.x)
• Z390 I AORUS PRO WIFI (rev. 1.0)

References:

• lm-sensors/lm-sensors#154
• https://bugzilla.kernel.org/show_bug.cgi?id=204807
• https://lwn.net/Articles/391230/
• https://uefi.org/specs/ACPI/6.4/19_ASL_Reference/ACPI_Source_Language_Reference.html#indexfield-declare-index-data-fields

Upstreaming:

• https://lore.kernel.org/platform-driver-x86/20210405132007.290275-1-linux@weissschuh.net/

Open questions:

• The ASL IndexField does not cover all relevant registers, can it be extended somehow?
• Not all registers are exposed via ACPI methods, can they be accessed directly?
• Some registers are exposed via ACPI methods but are not reachable directly from the WMI dispatcher.
  • Does ASL have some sort of reflection that could enable those methods?
  • Is it possible to call those methods directly, bypassing WMI?

Installation

• make
• sudo insmod ./gigabyte-wmi.ko force_load=1

Testing

• cat /sys/class/wmi_bus/wmi_bus-PNP0C14\:00/DEADBEEF-2001-0000-00A0-C90629100000/hwmon/hwmon*/temp?_input
• sensors
• Report your results on #1