| Message ID | 1554257354-7440-3-git-send-email-chunfeng.yun@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | add USB Type-B GPIO connector driver | expand |
Hi Rob, Gentle ping, could you please comment on this patch? Thanks a lot On Wed, 2019-04-03 at 10:09 +0800, Chunfeng Yun wrote: > 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 <chunfeng.yun@mediatek.com> > --- > 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 | 49 +++++++++++++++++++ > 1 file changed, 49 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..d2e1c4e01b6d > --- /dev/null > +++ b/Documentation/devicetree/bindings/usb/typeb-conn-gpio.txt > @@ -0,0 +1,49 @@ > +USB Type-B GPIO Connector > + > +This is a virtual device used to switch dual role mode from the USB ID pin > +connected to an input GPIO pin. > + > +Required properties: > +- compatible : Should be "linux,typeb-conn-gpio" > + > +Sub-nodes: > +- connector : should be present. > + - compatible : should be "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. > + see connector/usb-connector.txt > + > +- port : should be present. > + see graph.txt > + > +Example: > + > +rsw_iddig: role_sw_iddig { > + compatible = "linux,typeb-conn-gpio"; > + status = "okay"; > + > + connector { > + compatible = "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>; > + }; > + }; > +}; > + > +&mtu3 { > + status = "okay"; > + > + port { > + usb_role_sw: endpoint@0 { > + remote-endpoint = <&bconn_ep>; > + }; > + }; > +};
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..d2e1c4e01b6d --- /dev/null +++ b/Documentation/devicetree/bindings/usb/typeb-conn-gpio.txt @@ -0,0 +1,49 @@ +USB Type-B GPIO Connector + +This is a virtual device used to switch dual role mode from the USB ID pin +connected to an input GPIO pin. + +Required properties: +- compatible : Should be "linux,typeb-conn-gpio" + +Sub-nodes: +- connector : should be present. + - compatible : should be "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. + see connector/usb-connector.txt + +- port : should be present. + see graph.txt + +Example: + +rsw_iddig: role_sw_iddig { + compatible = "linux,typeb-conn-gpio"; + status = "okay"; + + connector { + compatible = "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>; + }; + }; +}; + +&mtu3 { + status = "okay"; + + port { + usb_role_sw: endpoint@0 { + remote-endpoint = <&bconn_ep>; + }; + }; +};
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 <chunfeng.yun@mediatek.com> --- 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 | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/typeb-conn-gpio.txt