dt-bindings: Document JZ4770 PHY bindings

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/usb/ingenic,jz4770-phy.yaml#

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

title: Ingenic JZ4770 USB PHY devicetree bindings

maintainers:

  - Paul Cercueil <paul@crapouillou.net>

properties:

  $nodename:

    pattern: '^usb-phy@.*'

  compatible:

    enum:

      - ingenic,jz4770-phy

  reg:

    maxItems: 1

  clocks:

    maxItems: 1

  vcc-supply:

    description: VCC power supply

  '#phy-cells':

    const: 0

required:

  - compatible

  - reg

  - clocks

  - vcc-supply

  - '#phy-cells'

additionalProperties: false

examples:

  - |

    #include <dt-bindings/clock/jz4770-cgu.h>

    otg_phy: usb-phy@3c {

      compatible = "ingenic,jz4770-phy";

      reg = <0x3c 0x10>;

      vcc-supply = <&vcc>;

      clocks = <&cgu JZ4770_CLK_OTG_PHY>;

      #phy-cells = <0>;

    };