Hi Rob, Em Tue, 28 Sep 2021 09:40:06 +0200 Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> escreveu: > From: Yu Chen <chenyu56@xxxxxxxxxx> > > This patch adds binding documentation to support USB HUB and > USB data role switch of HiSilicon HiKey960 and HiKey970 boards. > > [mchehab: updated OF schema and added HiKey970 example] > Signed-off-by: Yu Chen <chenyu56@xxxxxxxxxx> > Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx> > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> Could you please review and apply this patch on your tree? It is the only missing piece for USB to start working on HiKey 960/970. > --- > .../bindings/misc/hisilicon,hikey-usb.yaml | 87 +++++++++++++++++++ > 1 file changed, 87 insertions(+) > create mode 100644 Documentation/devicetree/bindings/misc/hisilicon,hikey-usb.yaml > > 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..761ab686121a > --- /dev/null > +++ b/Documentation/devicetree/bindings/misc/hisilicon,hikey-usb.yaml > @@ -0,0 +1,87 @@ > +# 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: HiKey960/970 onboard USB GPIO Hub > + > +maintainers: > + - John Stultz <john.stultz@xxxxxxxxxx> > + > +description: | > + Supports the onboard USB GPIO hubs found on HiKey960/970. > + Such hubs require a power supply for the USB I/O. Depending on the > + exact hub model, after USB I/O is powered up, a reset should be needed. > + > + It also 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 and powers up the onboard USB-A host ports. > + > + Schematics about such hubs can be found here: > + https://github.com/96boards/documentation/raw/master/consumer/hikey/hikey960/hardware-docs/HiKey960_Schematics.pdf > + https://www.96boards.org/documentation/consumer/hikey/hikey970/hardware-docs/files/hikey970-schematics.pdf > + > +properties: > + compatible: > + enum: > + - hisilicon,usbhub > + > + typec-vbus-gpios: > + $ref: /schemas/types.yaml#/definitions/phandle-array > + description: phandle to the typec-vbus gpio > + > + otg-switch-gpios: > + $ref: /schemas/types.yaml#/definitions/phandle-array > + description: phandle to the otg-switch gpio > + > + hub-reset-en-gpios: > + $ref: /schemas/types.yaml#/definitions/phandle-array > + description: phandle to the hub reset gpio > + > + usb-role-switch: > + $ref: /schemas/types.yaml#/definitions/flag > + description: Support role switch. > + > + hub-vdd-supply: > + description: regulator for hub power > + > + port: > + description: | > + describe hadware connections between USB endpoints. > + 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 > + - hub-vdd-supply > + - port > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/gpio/gpio.h> > + > + usb-hub { > + compatible = "hisilicon,usbhub"; > + typec-vbus-gpios = <&gpio25 2 GPIO_ACTIVE_HIGH>; > + otg-switch-gpios = <&gpio25 6 GPIO_ACTIVE_HIGH>; > + hub-reset-en-gpios = <&gpio0 3 GPIO_ACTIVE_HIGH>; > + hub-vdd-supply = <&usb_hub_vdd>; > + usb-role-switch; > + port { > + #address-cells = <1>; > + #size-cells = <0>; > + usb_ep0: endpoint@0 { > + reg = <0>; > + remote-endpoint = <&dwc3_role_switch>; > + }; > + usb_ep1: endpoint@1 { > + reg = <1>; > + remote-endpoint = <&rt1711h_ep>; > + }; > + }; > + };
