Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756617AbdIISjr (ORCPT ); Sat, 9 Sep 2017 14:39:47 -0400 Received: from mail-ua0-f194.google.com ([209.85.217.194]:33127 "EHLO mail-ua0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756340AbdIISjp (ORCPT ); Sat, 9 Sep 2017 14:39:45 -0400 X-Google-Smtp-Source: ADKCNb4ScYgWObMok02Ovjlwm6VQZCcICrswp2ydIVvlqMjZtBj8G+p8PwaWA7SP4Ayo4z8F9ujtzD136QGhmMQqSRE= MIME-Version: 1.0 In-Reply-To: <20170909070929.GH2477@lahna.fi.intel.com> References: <1504884191-16528-1-git-send-email-mario.limonciello@dell.com> <20170909070929.GH2477@lahna.fi.intel.com> From: Yehezkel Bernat Date: Sat, 9 Sep 2017 21:39:24 +0300 Message-ID: Subject: Re: [PATCH v3] Add driver to force WMI Thunderbolt controller power status To: Mika Westerberg Cc: Mario Limonciello , dvhart@infradead.org, LKML , platform-driver-x86@vger.kernel.org, Richard Hughes Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1031 Lines: 26 (Now in plain text. Sorry about that.) On Sat, Sep 9, 2017 at 10:09 AM, Mika Westerberg wrote: > 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 > > Reviewed-by: Mika Westerberg FWIW, Reviewed-by: Yehezkel Bernat