Commit 0842b8fe authored by Macpaul Lin's avatar Macpaul Lin Committed by Greg Kroah-Hartman
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dt-bindings: usb: Add binding for TI USB8020B hub controller 



The TI USB8020B is a USB 3.0 hub controller with 2 ports.

This initial version of the binding only describes USB related aspects
of the USB8020B, it does not cover the option of connecting the controller
as an i2c slave.

Signed-off-by: default avatarMacpaul Lin <macpaul.lin@mediatek.com>
Link: https://lore.kernel.org/r/20240227090228.22156-1-macpaul.lin@mediatek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2e021179

Documentation/devicetree/bindings/usb/ti,usb8020b.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/ti,usb8020b.yaml#

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



title: TI USB8020B USB 3.0 hub controller



maintainers:

  - Macpaul Lin <macpaul.lin@mediatek.com>



allOf:

  - $ref: usb-device.yaml#



properties:

  compatible:

    enum:

      - usb451,8025

      - usb451,8027



  reg: true



  reset-gpios:

    items:

      - description: GPIO specifier for GRST# pin.



  vdd-supply:

    description:

      VDD power supply to the hub



  peer-hub:

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

    description:

      phandle to the peer hub on the controller.



required:

  - compatible

  - reg

  - peer-hub



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 = "usb451,8027";

          reg = <1>;

          peer-hub = <&hub_3_0>;

          reset-gpios = <&pio 7 GPIO_ACTIVE_HIGH>;

          vdd-supply = <&usb_hub_fixed_3v3>;

        };



        /* 3.0 hub on port 2 */

        hub_3_0: hub@2 {

          compatible = "usb451,8025";

          reg = <2>;

          peer-hub = <&hub_2_0>;

          reset-gpios = <&pio 7 GPIO_ACTIVE_HIGH>;

          vdd-supply = <&usb_hub_fixed_3v3>;

        };

    };