Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751463AbdIKVpD (ORCPT ); Mon, 11 Sep 2017 17:45:03 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:36562 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751304AbdIKVpC (ORCPT ); Mon, 11 Sep 2017 17:45:02 -0400 Date: Mon, 11 Sep 2017 23:44:58 +0200 From: Darren Hart To: Mario Limonciello Cc: LKML , platform-driver-x86@vger.kernel.org, Richard Hughes , Yehezkel Bernat , Mika Westerberg Subject: Re: [PATCH v3] Add driver to force WMI Thunderbolt controller power status Message-ID: <20170911214458.GB128849@localhost.localdomain> References: <1504884191-16528-1-git-send-email-mario.limonciello@dell.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1504884191-16528-1-git-send-email-mario.limonciello@dell.com> User-Agent: Mutt/1.8.3 (2017-05-23) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 848 Lines: 22 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 Queued for testing, thanks everyone. -- Darren Hart VMware Open Source Technology Center