From patchwork Thu Aug 29 09:22:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 11120733 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 05AD414D5 for ; Thu, 29 Aug 2019 09:23:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E006A23404 for ; Thu, 29 Aug 2019 09:23:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727244AbfH2JXQ (ORCPT ); Thu, 29 Aug 2019 05:23:16 -0400 Received: from Mailgw01.mediatek.com ([1.203.163.78]:14552 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727101AbfH2JXN (ORCPT ); Thu, 29 Aug 2019 05:23:13 -0400 X-UUID: 31ecad922b4b4ed0a32146e3ad90497d-20190829 X-UUID: 31ecad922b4b4ed0a32146e3ad90497d-20190829 Received: from mtkcas34.mediatek.inc [(172.27.4.253)] by mailgw01.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLS) with ESMTP id 1608560054; Thu, 29 Aug 2019 17:23:11 +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; Thu, 29 Aug 2019 17:23:09 +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; Thu, 29 Aug 2019 17:23:08 +0800 From: Chunfeng Yun To: Rob Herring , Greg Kroah-Hartman , Biju Das CC: Mark Rutland , Chunfeng Yun , Matthias Brugger , Adam Thomson , Li Jun , Badhri Jagan Sridharan , Heikki Krogerus , Hans de Goede , Andy Shevchenko , Min Guo , , , , , , Linus Walleij , Nagarjuna Kristam Subject: [PATCH next v11 03/11] dt-bindings: usb: add binding for USB GPIO based connection detection driver Date: Thu, 29 Aug 2019 17:22:30 +0800 Message-ID: <1567070558-29417-4-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1567070558-29417-1-git-send-email-chunfeng.yun@mediatek.com> References: <1567070558-29417-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: B59DAFD410BA8AF279F9E0A9B2672EA1E00E8BAC821020BD5225B94C965F85A12000:8 X-MTK: N Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org It's used to support dual role switch via GPIO when use Type-B receptacle, typically the USB ID pin is connected to an input GPIO, and also used to enable/disable device when the USB Vbus pin is connected to an input GPIO. Signed-off-by: Chunfeng Yun Reviewed-by: Linus Walleij Reviewed-by: Rob Herring --- v11 changes: 1. add Reviewed-by Linus 2. change compatible as "gpio-usb-b-connector", and remove label in example suggested by Rob v9~v10 no changes v8 changes: 1. rename the title 2. change the compatible as "linux,usb-conn-gpio" instead of "linux,typeb-conn-gpio" v7 changes: 1. add description for device only mode v6 changes: 1. remove status and port nodes in example 2. make vbus-supply as optional property v5 changes: 1. treat type-B connector as child device of USB controller's, but not as a separate virtual device, suggested by Rob 2. put connector's port node under connector node, suggested by Rob v4 no changes v3 changes: 1. treat type-B connector as a virtual device, but not child device of USB controller's v2 changes: 1. new patch to make binding clear suggested by Hans --- .../devicetree/bindings/usb/usb-conn-gpio.txt | 30 +++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/usb-conn-gpio.txt diff --git a/Documentation/devicetree/bindings/usb/usb-conn-gpio.txt b/Documentation/devicetree/bindings/usb/usb-conn-gpio.txt new file mode 100644 index 000000000000..3d05ae56cb0d --- /dev/null +++ b/Documentation/devicetree/bindings/usb/usb-conn-gpio.txt @@ -0,0 +1,30 @@ +USB GPIO Based Connection Detection + +This is typically used to switch dual role mode from the USB ID pin connected +to an input GPIO, and also used to enable/disable device mode from the USB +Vbus pin connected to an input GPIO. + +Required properties: +- compatible : should include "gpio-usb-b-connector" and "usb-b-connector". +- id-gpios, vbus-gpios : input gpios, either one of them must be present, + and both can be present as well. + see connector/usb-connector.txt + +Optional properties: +- vbus-supply : can be present if needed when supports dual role mode. + see connector/usb-connector.txt + +- Sub-nodes: + - port : can be present. + see graph.txt + +Example: + +&mtu3 { + connector { + compatible = "gpio-usb-b-connector", "usb-b-connector"; + type = "micro"; + id-gpios = <&pio 12 GPIO_ACTIVE_HIGH>; + vbus-supply = <&usb_p0_vbus>; + }; +};