From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chunfeng Yun Subject: [PATCH v5 2/6] dt-bindings: usb: add binding for Type-B GPIO connector driver Date: Tue, 14 May 2019 16:47:19 +0800 Message-ID: <1557823643-8616-3-git-send-email-chunfeng.yun@mediatek.com> References: <1557823643-8616-1-git-send-email-chunfeng.yun@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1557823643-8616-1-git-send-email-chunfeng.yun-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+glpam-linux-mediatek=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: Rob Herring , Greg Kroah-Hartman , Heikki Krogerus Cc: Mark Rutland , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Hans de Goede , Badhri Jagan Sridharan , Linus Walleij , linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Biju Das , Matthias Brugger , Andy Shevchenko , linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Min Guo , Chunfeng Yun , Adam Thomson , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Li Jun List-Id: devicetree@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 pin Signed-off-by: Chunfeng Yun --- 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 --- .../bindings/usb/typeb-conn-gpio.txt | 42 +++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/typeb-conn-gpio.txt diff --git a/Documentation/devicetree/bindings/usb/typeb-conn-gpio.txt b/Documentation/devicetree/bindings/usb/typeb-conn-gpio.txt new file mode 100644 index 000000000000..20dd3499a348 --- /dev/null +++ b/Documentation/devicetree/bindings/usb/typeb-conn-gpio.txt @@ -0,0 +1,42 @@ +USB Type-B GPIO Connector + +This is used to switch dual role mode from the USB ID pin connected to +an input GPIO pin. + +Required properties: +- compatible : should include "linux,typeb-conn-gpio" and "usb-b-connector". +- id-gpios, vbus-gpios : either one of them must be present, and both + can be present as well. +- vbus-supply : can be present if needed when supports dual role mode or + host mode. + see connector/usb-connector.txt + +Sub-nodes: +- port : should be present. + see graph.txt + +Example: + +&mtu3 { + status = "okay"; + + connector { + compatible = "linux,typeb-conn-gpio", "usb-b-connector"; + label = "micro-USB"; + type = "micro"; + id-gpios = <&pio 12 GPIO_ACTIVE_HIGH>; + vbus-supply = <&usb_p0_vbus>; + + port { + bconn_ep: endpoint@0 { + remote-endpoint = <&usb_role_sw>; + }; + }; + }; + + port { + usb_role_sw: endpoint@0 { + remote-endpoint = <&bconn_ep>; + }; + }; +}; -- 2.21.0