From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84B0FC352A3 for ; Tue, 11 Feb 2020 14:34:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 58C08206D7 for ; Tue, 11 Feb 2020 14:34:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728807AbgBKOen (ORCPT ); Tue, 11 Feb 2020 09:34:43 -0500 Received: from mx2.suse.de ([195.135.220.15]:38508 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728589AbgBKOen (ORCPT ); Tue, 11 Feb 2020 09:34:43 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id E9244C156; Tue, 11 Feb 2020 14:34:41 +0000 (UTC) Message-ID: <1581431677.1580.7.camel@suse.de> Subject: Re: No PNP0CA0 device on a Dell Precision 5520 laptop From: Oliver Neukum To: Heikki Krogerus Cc: linux-usb@vger.kernel.org Date: Tue, 11 Feb 2020 15:34:37 +0100 In-Reply-To: <20200211142855.GC1498@kuha.fi.intel.com> References: <1581427518.1580.3.camel@suse.de> <20200211135920.GB1498@kuha.fi.intel.com> <1581430450.1580.5.camel@suse.de> <20200211142855.GC1498@kuha.fi.intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Am Dienstag, den 11.02.2020, 16:28 +0200 schrieb Heikki Krogerus: > On Tue, Feb 11, 2020 at 03:14:10PM +0100, Oliver Neukum wrote: > > Am Dienstag, den 11.02.2020, 15:59 +0200 schrieb Heikki Krogerus: > > > cat /sys/bus/acpi/devices/USBC000\:00/status > > > > Technically -ENODEV. It does not exist, even in a listing. > > But this thing definitely has a type C port. It is connected > > to a docking station which supplies the whole system with power. > > Ethernet also works. > > There is still no requirement for the BIOS or the EC firmware to > expose UCSI to the operating system. If the ACPI node is not there, > then there is no UCSI on that system. The USB Type-C connectors > function autonomously in any case on a system that exposes them to the > operating system with UCSI. UCSI is more like an optional status > interface that allows limited control over some specific things like > role swapping. > > UCSI is usually supported when the USB Power Delivery (USB PD) > controllers are connected to the Embedded Controller on the system, > but on some of our platforms they are directly connected to the SOC > instead. So on those platforms we can directly communicate with the > USB PD controller from the operating system, which is actually much > better situation compared to UCSI IMO. > > Do you have this ACPI node: INT3515 ? > > It's for the TI TPS6598x USB PD controllers. Hi, yes I got that one. Thanks for the tip. Regards Oliver