xref: /kernel/linux/linux-5.10/Documentation/devicetree/bindings/usb/generic-ehci.yaml

# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/usb/generic-ehci.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: USB EHCI Controller Device Tree Bindings

maintainers:
  - Greg Kroah-Hartman <gregkh@linuxfoundation.org>

allOf:
  - $ref: "usb-hcd.yaml"
  - if:
      properties:
        compatible:
          not:
            contains:
              const: ibm,usb-ehci-440epx
    then:
      properties:
        reg:
          maxItems: 1

properties:
  compatible:
    contains:
      const: generic-ehci

  reg:
    minItems: 1
    maxItems: 2

  interrupts:
    maxItems: 1

  resets:
    minItems: 1
    maxItems: 4

  clocks:
    minItems: 1
    maxItems: 4
    description: |
      In case the Renesas R-Car Gen3 SoCs:
        - if a host only channel: first clock should be host.
        - if a USB DRD channel: first clock should be host and second
          one should be peripheral

  power-domains:
    maxItems: 1

  big-endian:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      Set this flag for HCDs with big endian descriptors and big
      endian registers.

  big-endian-desc:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      Set this flag for HCDs with big endian descriptors.

  big-endian-regs:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      Set this flag for HCDs with big endian registers.

  has-transaction-translator:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      Set this flag if EHCI has a Transaction Translator built into
      the root hub.

  needs-reset-on-resume:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      Set this flag to force EHCI reset after resume.

  companion:
    $ref: /schemas/types.yaml#/definitions/phandle
    description:
      Phandle of a companion.

  phys:
    description: PHY specifier for the USB PHY

  phy-names:
    const: usb

  iommus:
    maxItems: 1

required:
  - compatible
  - reg
  - interrupts

additionalProperties: false

examples:
  - |
    usb@e0000300 {
        compatible = "ibm,usb-ehci-440epx", "generic-ehci";
        interrupt-parent = <&UIC0>;
        interrupts = <0x1a 4>;
        reg = <0xe0000300 90>, <0xe0000390 70>;
        big-endian;
    };

  - |
    ehci0: usb@1c14000 {
        compatible = "allwinner,sun4i-a10-ehci", "generic-ehci";
        reg = <0x01c14000 0x100>;
        interrupts = <39>;
        clocks = <&ahb_gates 1>;
        phys = <&usbphy 1>;
        phy-names = "usb";
    };

...