diff --git a/Documentation/devicetree/bindings/misc/hisilicon-hikey-usb.yaml b/Documentation/devicetree/bindings/misc/hisilicon-hikey-usb.yaml new file mode 100644 index 000000000000..1fc3b198ef73 --- /dev/null +++ b/Documentation/devicetree/bindings/misc/hisilicon-hikey-usb.yaml @@ -0,0 +1,85 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2019 Linaro Ltd. +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/misc/hisilicon-hikey-usb.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: HiKey960 onboard USB GPIO Hub + +maintainers: + - John Stultz + +description: | + Supports the onboard HiKey960 USB GPIO hub, which acts as a + role-switch intermediary to detect the state of the USB-C + port, to switch the hub into dual-role USB-C or host mode, + which enables the onboard USB-A host ports. + + Schematics about the hub can be found here: + https://github.com/96boards/documentation/raw/master/consumer/hikey/hikey960/hardware-docs/HiKey960_Schematics.pdf + +properties: + compatible: + items: + - const: hisilicon,gpio_hubv1 + + typec-vbus-gpios: + $ref: /schemas/types.yaml#/definitions/phandle + description: phandle to the typec-vbus gpio + + otg-switch-gpios: + $ref: /schemas/types.yaml#/definitions/phandle + description: phandle to the otg-switch gpio + + hub-vdd33-en-gpios: + $ref: /schemas/types.yaml#/definitions/phandle + description: phandle to the hub 3.3v power enablement gpio + + usb-role-switch: + $ref: /schemas/types.yaml#/definitions/flag + description: Support role switch. + + port: + description: | + any connector to the data bus of this controller should be modelled + using the OF graph bindings specified, if the "usb-role-switch" + property is used. Note for this driver, two ports are supported, + the first being the endpoint that will be notified by this driver, + and the second being the endpoint that notifies this driver of a + role switch. + + +required: + - compatible + - typec-vbus-gpios + - otg-switch-gpios + - hub-vdd33-en-gpios + - usb-role-switch + - port + +additionalProperties: false + +examples: + - | + hisi_hikey_usb: hisi_hikey_usb { + compatible = "hisilicon,gpio_hubv1"; + typec-vbus-gpios = <&gpio25 2 GPIO_ACTIVE_HIGH>; + otg-switch-gpios = <&gpio25 6 GPIO_ACTIVE_HIGH>; + hub-vdd33-en-gpios = <&gpio5 6 GPIO_ACTIVE_HIGH>; + usb-role-switch; + + port { + #address-cells = <1>; + #size-cells = <0>; + + hikey_usb_ep0: endpoint@0 { + reg = <0>; + remote-endpoint = <&dwc3_role_switch>; + }; + hikey_usb_ep1: endpoint@1 { + reg = <1>; + remote-endpoint = <&rt1711h_ep>; + }; + }; + };