From patchwork Wed May 8 09:17:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 10934835 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E828F933 for ; Wed, 8 May 2019 09:18:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D6CEC27CF9 for ; Wed, 8 May 2019 09:18:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C9132289B9; Wed, 8 May 2019 09:18:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EFFDE27CF9 for ; Wed, 8 May 2019 09:18:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727144AbfEHJSD (ORCPT ); Wed, 8 May 2019 05:18:03 -0400 Received: from mailgw02.mediatek.com ([1.203.163.81]:58038 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727095AbfEHJSC (ORCPT ); Wed, 8 May 2019 05:18:02 -0400 X-UUID: f8fa99313bcb48bc84e5086c75477e09-20190508 X-UUID: f8fa99313bcb48bc84e5086c75477e09-20190508 Received: from mtkcas35.mediatek.inc [(172.27.4.253)] by mailgw02.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLS) with ESMTP id 1820003838; Wed, 08 May 2019 17:17:56 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by MTKMBS31N1.mediatek.inc (172.27.4.69) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 8 May 2019 17:17:55 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 8 May 2019 17:17:54 +0800 From: Chunfeng Yun To: Rob Herring CC: Greg Kroah-Hartman , Mark Rutland , Matthias Brugger , , , , , , Biju Das , Yu Chen , Heikki Krogerus , Min Guo , Felipe Balbi , Chunfeng Yun Subject: [v3 PATCH] dt-binding: usb: add usb-role-switch property Date: Wed, 8 May 2019 17:17:44 +0800 Message-ID: X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a property usb-role-switch to tell the driver that use USB Role Switch framework to handle the role switch, it's useful when the driver has already supported other ways, such as extcon framework etc. Cc: Biju Das Cc: Yu Chen Signed-off-by: Chunfeng Yun Reviewed-by: Rob Herring Reviewed-by: Heikki Krogerus --- v3: add property type, modify description suggested by Heikki v2: describe it in terms of h/w functionality suggested by Rob v1: the property is discussed in: [v2,2/7] dt-bindings: usb: renesas_usb3: add usb-role-switch property https://patchwork.kernel.org/patch/10852497/ Mediatek and Hisilicon also try to use it: [v4,3/6] dt-bindings: usb: mtu3: add properties about USB Role Switch https://patchwork.kernel.org/patch/10918385/ [v4,6/6] usb: mtu3: register a USB Role Switch for dual role mode https://patchwork.kernel.org/patch/10918367/ [v6,10/13] usb: dwc3: Registering a role switch in the DRD code https://patchwork.kernel.org/patch/10909981/ --- Documentation/devicetree/bindings/usb/generic.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/generic.txt b/Documentation/devicetree/bindings/usb/generic.txt index 0a74ab8dfdc2..cf5a1ad456e6 100644 --- a/Documentation/devicetree/bindings/usb/generic.txt +++ b/Documentation/devicetree/bindings/usb/generic.txt @@ -30,6 +30,10 @@ Optional properties: optional for OTG device. - adp-disable: tells OTG controllers we want to disable OTG ADP, ADP is optional for OTG device. + - usb-role-switch: boolean, indicates that the device is capable of assigning + the USB data role (USB host or USB device) for a given + USB connector, such as Type-C, Type-B(micro). + see connector/usb-connector.txt. This is an attribute to a USB controller such as: