Documentation/devicetree/bindings/usb/smsc,usb3503.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/usb/smsc,usb3503.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/usb/smsc,usb3503.yaml
Extension
.yaml
Size
3778 bytes
Lines
160
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
%YAML 1.2
---
$id: http://devicetree.org/schemas/usb/smsc,usb3503.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: SMSC USB3503 High-Speed Hub Controller

maintainers:
  - Dongjin Kim <tobetter@gmail.com>

properties:
  compatible:
    enum:
      - smsc,usb3503
      - smsc,usb3503a
      - smsc,usb3803

  reg:
    maxItems: 1

  connect-gpios:
    maxItems: 1
    description: >
      GPIO for connect

  intn-gpios:
    maxItems: 1
    description: >
      GPIO for interrupt

  reset-gpios:
    maxItems: 1
    description: >
      GPIO for reset

  bypass-gpios:
    maxItems: 1
    description: >
      GPIO for bypass.
      Control signal to select between HUB MODE and BYPASS MODE.

  disabled-ports:
    $ref: /schemas/types.yaml#/definitions/uint32-array
    minItems: 1
    maxItems: 3
    items:
      minimum: 1
      maximum: 3
    description: >
      Specifies the ports unused using their port number. Do not describe this
      property if all ports have to be enabled.

  initial-mode:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: >
      Specifies initial mode. 1 for Hub mode, 2 for standby mode and 3 for bypass mode.
      In bypass mode the downstream port 3 is connected to the upstream port with low
      switch resistance R_on.

  clocks:
    maxItems: 1
    description: >
      Clock used for driving REFCLK signal. If not provided the driver assumes
      that clock signal is always available, its rate is specified by REF_SEL
      pins and a value from the primary reference clock frequencies table is
      used.

  clock-names:
    const: refclk

Annotation

Implementation Notes