Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
Extension
.yaml
Size
2615 bytes
Lines
103
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/phy/fsl,imx8-pcie-phy.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Freescale i.MX8 SoC series PCIe PHY

maintainers:
  - Richard Zhu <hongxing.zhu@nxp.com>

properties:
  "#phy-cells":
    const: 0

  compatible:
    enum:
      - fsl,imx8mm-pcie-phy
      - fsl,imx8mp-pcie-phy

  reg:
    maxItems: 1

  clocks:
    maxItems: 1

  clock-names:
    items:
      - const: ref

  resets:
    minItems: 1
    maxItems: 2

  reset-names:
    oneOf:
      - items:          # for iMX8MM
          - const: pciephy
      - items:          # for IMX8MP
          - const: pciephy
          - const: perst

  fsl,refclk-pad-mode:
    description: |
      Specifies the mode of the refclk pad used. It can be UNUSED(PHY
      refclock is derived from SoC internal source), INPUT(PHY refclock
      is provided externally via the refclk pad) or OUTPUT(PHY refclock
      is derived from SoC internal source and provided on the refclk pad).
      Refer include/dt-bindings/phy/phy-imx8-pcie.h for the constants
      to be used.
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [ 0, 1, 2 ]

  fsl,tx-deemph-gen1:
    description: Gen1 De-emphasis value (optional).
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 0

  fsl,tx-deemph-gen2:
    description: Gen2 De-emphasis value (optional).
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 0

  fsl,clkreq-unsupported:
    type: boolean
    description: A boolean property indicating the CLKREQ# signal is
      not supported in the board design (optional)

  power-domains:
    description: PCIe PHY  power domain (optional).

Annotation

Implementation Notes