Documentation/devicetree/bindings/spi/arm,pl022-peripheral-props.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/spi/arm,pl022-peripheral-props.yaml

File Facts

System: Linux kernel
Corpus path: Documentation/devicetree/bindings/spi/arm,pl022-peripheral-props.yaml
Extension: .yaml
Size: 1554 bytes
Lines: 62
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.

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

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/spi/arm,pl022-peripheral-props.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Peripheral-specific properties for Arm PL022 SPI controller

maintainers:
  - Linus Walleij <linusw@kernel.org>

select: false

properties:
  pl022,interface:
    description: SPI interface type
    $ref: /schemas/types.yaml#/definitions/uint32
    enum:
      - 0      # SPI
      - 1      # Texas Instruments Synchronous Serial Frame Format
      - 2      # Microwire (Half Duplex)

  pl022,com-mode:
    description: Specifies the transfer mode
    $ref: /schemas/types.yaml#/definitions/uint32
    enum:
      - 0      # interrupt mode
      - 1      # polling mode
      - 2      # DMA mode
    default: 1

  pl022,rx-level-trig:
    description: Rx FIFO watermark level
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 4

  pl022,tx-level-trig:
    description: Tx FIFO watermark level
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 4

  pl022,ctrl-len:
    description: Microwire interface - Control length
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0x03
    maximum: 0x1f

  pl022,wait-state:
    description: Microwire interface - Wait state
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1]

  pl022,duplex:
    description: Microwire interface - Full/Half duplex
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1]

additionalProperties: true
...

Annotation

Atlas domain: Support Tooling And Documentation / Documentation.
Implementation status: atlas-only.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.