Commit 00fcc9c8 authored by Chaoyi Chen's avatar Chaoyi Chen Committed by Greg Kroah-Hartman
Browse files

dt-bindings: usb: Add binding for WCH CH334/CH335 hub controller 

The WCH CH334/CH335[0] are USB2.0 protocol compliant 4-port USB HUB
controller chips, supporting USB2.0 high-speed and full-speed for
upstream ports, and USB2.0 high-speed 480Mbps, full-speed 12Mbps and
low-speed 1.5Mbps for downstream ports, supporting not only low-cost STT
mode (single TT schedules 4 downstream ports in time share), but also
supports high performance MTT mode (4 TTs each corresponding to 1 port,
concurrent processing).

Add a device tree binding for it.

[0]: https://www.wch-ic.com/downloads/CH334DS1_PDF.html



Signed-off-by: default avatarChaoyi Chen <chaoyi.chen@rock-chips.com>
Reviewed-by: default avatarRob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260113095827.115-2-kernel@airkyi.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9accc68b

Documentation/devicetree/bindings/usb/wch,ch334.yaml

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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause

%YAML 1.2

---

$id: http://devicetree.org/schemas/usb/wch,ch334.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: WCH CH334/CH335 USB 2.0 Hub Controller



maintainers:

  - Chaoyi Chen <kernel@airkyi.com>



allOf:

  - $ref: usb-hub.yaml#



properties:

  compatible:

    enum:

      - usb1a86,8091



  reg: true



  reset-gpios:

    description: GPIO controlling the RESET# pin.



  vdd33-supply:

    description:

      The regulator that provides 3.3V core power to the hub.



  v5-supply:

    description:

      The regulator that provides 3.3V or 5V power to the hub.



  ports:

    $ref: /schemas/graph.yaml#/properties/ports



    patternProperties:

      '^port@':

        $ref: /schemas/graph.yaml#/properties/port



        properties:

          reg:

            minimum: 1

            maximum: 4



required:

  - compatible

  - reg



additionalProperties: false



examples:

  - |

    #include <dt-bindings/gpio/gpio.h>

    usb {

        #address-cells = <1>;

        #size-cells = <0>;



        hub: hub@1 {

            compatible = "usb1a86,8091";

            reg = <1>;

            reset-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;

            v5-supply = <&vcc_3v3>;

            vdd33-supply = <&vcc_3v3>;

        };

    };