xref: /linux/Documentation/devicetree/bindings/usb/google,lga-dwc3.yaml (revision c17ee635fd3a482b2ad2bf5e269755c2eae5f25e)

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
# Copyright (c) 2025, Google LLC
%YAML 1.2
---
$id: http://devicetree.org/schemas/usb/google,lga-dwc3.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Google Tensor Series G5 (Laguna) DWC3 USB SoC Controller

maintainers:
  - Roy Luo <royluo@google.com>

description:
  Describes the DWC3 USB controller block implemented on Google Tensor SoCs,
  starting with the G5 generation (laguna). Based on Synopsys DWC3 IP, the
  controller features Dual-Role Device single port with hibernation add-on.

properties:
  compatible:
    const: google,lga-dwc3

  reg:
    items:
      - description: Core DWC3 IP registers.

  interrupts:
    items:
      - description: Core DWC3 interrupt.
      - description: High speed power management event for remote wakeup.
      - description: Super speed power management event for remote wakeup.

  interrupt-names:
    items:
      - const: core
      - const: hs_pme
      - const: ss_pme

  clocks:
    items:
      - description: Non-sticky module clock.
      - description: Sticky module clock.

  clock-names:
    items:
      - const: non_sticky
      - const: sticky

  resets:
    items:
      - description: Non-sticky module reset.
      - description: Sticky module reset.
      - description: DRD bus reset.
      - description: Top-level reset.

  reset-names:
    items:
      - const: non_sticky
      - const: sticky
      - const: drd_bus
      - const: top

  power-domains:
    items:
      - description: Power switchable domain, the child of top domain.
          Turning it on puts the controller into full power state,
          turning it off puts the controller into power gated state.
      - description: Top domain, the parent of power switchable domain.
          Turning it on puts the controller into power gated state,
          turning it off completely shuts off the controller.

  power-domain-names:
    items:
      - const: psw
      - const: top

  iommus:
    maxItems: 1

  google,usb-cfg-csr:
    description:
      A phandle to a syscon node used to access the USB configuration
      registers. These registers are the top-level wrapper of the USB
      subsystem and provide control and status for the integrated USB
      controller and USB PHY.
    $ref: /schemas/types.yaml#/definitions/phandle-array
    items:
      - items:
          - description: phandle to the syscon node.
          - description: USB host controller configuration register offset.
          - description: USB custom interrrupts control register offset.

required:
  - compatible
  - reg
  - interrupts
  - interrupt-names
  - clocks
  - clock-names
  - resets
  - reset-names
  - power-domains
  - power-domain-names
  - google,usb-cfg-csr

allOf:
  - $ref: snps,dwc3-common.yaml#

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/interrupt-controller/irq.h>
    soc {
        #address-cells = <2>;
        #size-cells = <2>;

        usb@c400000 {
            compatible = "google,lga-dwc3";
            reg = <0 0x0c400000  0 0xd060>;
            interrupts = <GIC_SPI 580 IRQ_TYPE_LEVEL_HIGH 0>,
                         <GIC_SPI 597 IRQ_TYPE_LEVEL_HIGH 0>,
                         <GIC_SPI 598 IRQ_TYPE_LEVEL_HIGH 0>;
            interrupt-names = "core", "hs_pme", "ss_pme";
            clocks = <&hsion_usbc_non_sticky_clk>,  <&hsion_usbc_sticky_clk>;
            clock-names = "non_sticky", "sticky";
            resets = <&hsion_resets_usbc_non_sticky>, <&hsion_resets_usbc_sticky>,
                     <&hsion_resets_usb_drd_bus>, <&hsion_resets_usb_top>;
            reset-names = "non_sticky", "sticky", "drd_bus", "top";
            power-domains = <&hsio_n_usb_psw>, <&hsio_n_usb>;
            power-domain-names = "psw", "top";
            phys = <&usb_phy 0>;
            phy-names = "usb2-phy";
            snps,quirk-frame-length-adjustment = <0x20>;
            snps,gfladj-refclk-lpm-sel-quirk;
            snps,incr-burst-type-adjustment = <4>;
            google,usb-cfg-csr = <&usb_cfg_csr 0x0 0x20>;
        };
    };
...