Commit 31360c28 authored by Anand Moon's avatar Anand Moon Committed by Greg Kroah-Hartman
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dt-bindings: usb: Add binding for Via lab VL817 hub controller 



The VIA Lab VL817 is a USB 3.1 Gen 1 hub and USB 2.0 hub
controller that features 4 downstream ports and 1 otg, with
an internal 5V regulator and has external reset pin.

Add a device tree binding for its USB protocol part.
The internal LDO is not covered by this and can just be modelled
as a fixed regulator.

Add combo of USB 2.0 and USB 3.0 root hub using peer-hub.

Signed-off-by: default avatarAnand Moon <linux.amoon@gmail.com>
Link: https://lore.kernel.org/r/20230118044418.875-7-linux.amoon@gmail.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5e86e1a5

Documentation/devicetree/bindings/usb/vialab,vl817.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/vialab,vl817.yaml#

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



title: Via labs VL817 USB 3.1 hub controller



maintainers:

  - Anand Moon <linux.amoon@gmail.com>



allOf:

  - $ref: usb-device.yaml#



properties:

  compatible:

    items:

      - enum:

          - usb2109,2817

          - usb2109,817



  reg: true



  reset-gpios:

    description: GPIO controlling the RESET# pin.



  vdd-supply:

    description:

      phandle to the regulator that provides power to the hub.



  peer-hub:

    $ref: '/schemas/types.yaml#/definitions/phandle'

    description:

      phandle to the peer hub on the controller.



required:

  - peer-hub

  - compatible

  - reg



additionalProperties: false



examples:

  - |

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



    usb {

        dr_mode = "host";

        #address-cells = <1>;

        #size-cells = <0>;



        /* 2.0 hub on port 1 */

        hub_2_0: hub@1 {

            compatible = "usb2109,2817";

            reg = <1>;

            vdd-supply = <&vcc_5v>;

            peer-hub = <&hub_3_0>;

            reset-gpios = <&gpio 20 GPIO_ACTIVE_LOW>;

        };



        /* 3.1 hub on port 4 */

        hub_3_0: hub@2 {

            compatible = "usb2109,817";

            reg = <2>;

            vdd-supply = <&vcc_5v>;

            peer-hub = <&hub_2_0>;

            reset-gpios = <&gpio 20 GPIO_ACTIVE_LOW>;

        };

    };