On Fri, Sep 08, 2017 at 10:23:11AM -0500, Mario Limonciello wrote: > Current implementations of Intel Thunderbolt controllers will go > into a low power mode when not in use. > > Many machines containing these controllers also have a GPIO wired up > that can force the controller awake. This is offered via a ACPI-WMI > interface intended to be manipulated by a userspace utility. > > This mechanism is provided by Intel to OEMs to include in BIOS. > It uses an industry wide GUID that is populated in a separate _WDG > entry with no binary MOF. > > This interface allows software such as fwupd to wake up thunderbolt > controllers to query the firmware version or flash new firmware. > > Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxxx> Reviewed-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
