Documentation/devicetree/bindings/usb/nvidia,tegra234-xusb.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/usb/nvidia,tegra234-xusb.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/usb/nvidia,tegra234-xusb.yaml
Extension
.yaml
Size
5675 bytes
Lines
187
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/usb/nvidia,tegra234-xusb.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NVIDIA Tegra234 xHCI controller

maintainers:
  - Thierry Reding <thierry.reding@gmail.com>
  - Jon Hunter <jonathanh@nvidia.com>

description: |
  The Tegra xHCI controller supports both USB2 and USB3 interfaces exposed by
  the Tegra XUSB pad controller. The xHCI controller controls up to eight
  ports; there are four USB 2.0 ports and four USB 3.2 Gen1 x1 ports.

properties:
  compatible:
    const: nvidia,tegra234-xusb

  reg:
    items:
      - description: xHCI host registers
      - description: XUSB FPCI registers
      - description: XUSB bar2 registers

  reg-names:
    items:
      - const: hcd
      - const: fpci
      - const: bar2

  interrupts:
    minItems: 2
    items:
      - description: xHCI host interrupt
      - description: mailbox interrupt
      - description: USB wake event 0
      - description: USB wake event 1
      - description: USB wake event 2
      - description: USB wake event 3
      - description: USB wake event 4
      - description: USB wake event 5
      - description: USB wake event 6
    description: |
      The first two interrupts are required for the USB host controller. The
      remaining USB wake event interrupts are optional. Each USB wake event is
      independent; it is not necessary to use all of these events on a
      platform. The USB host controller can function even if no wake-up events
      are defined. The USB wake event interrupts are handled by the Tegra PMC;
      hence, the interrupt controller for these is the PMC and the interrupt
      IDs correspond to the PMC wake event IDs. A complete list of wake event
      IDs is provided below, and this information is also present in the Tegra
      TRM document.

        PMC wake-up 76 for USB3 port 0 wakeup
        PMC wake-up 77 for USB3 port 1 wakeup
        PMC wake-up 78 for USB3 port 2 and port 3 wakeup
        PMC wake-up 79 for USB2 port 0 wakeup
        PMC wake-up 80 for USB2 port 1 wakeup
        PMC wake-up 81 for USB2 port 2 wakeup
        PMC wake-up 82 for USB2 port 3 wakeup

  clocks:
    items:
      - description: XUSB host clock
      - description: XUSB Falcon source clock
      - description: XUSB SuperSpeed clock
      - description: XUSB SuperSpeed source clock

Annotation

Implementation Notes