Documentation/devicetree/bindings/spi/spi-pl022.yaml

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

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/spi/spi-pl022.yaml
Extension
.yaml
Size
2427 bytes
Lines
112
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/spi/spi-pl022.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: ARM PL022 SPI controller

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

allOf:
  - $ref: spi-controller.yaml#
  - $ref: /schemas/arm/primecell.yaml#

# We need a select here so we don't match all nodes with 'arm,primecell'
select:
  properties:
    compatible:
      contains:
        const: arm,pl022
  required:
    - compatible

properties:
  compatible:
    items:
      - const: arm,pl022
      - const: arm,primecell

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    maxItems: 2

  clock-names:
    items:
      - const: sspclk
      - const: apb_pclk

  pl022,autosuspend-delay:
    description: delay in ms following transfer completion before the
      runtime power management system suspends the device. A setting of 0
      indicates no delay and the device will be suspended immediately.
    $ref: /schemas/types.yaml#/definitions/uint32

  pl022,rt:
    description: indicates the controller should run the message pump with realtime
      priority to minimise the transfer latency on the bus (boolean)
    type: boolean

  dmas:
    description:
      Two or more DMA channel specifiers following the convention outlined
      in bindings/dma/dma.txt
    minItems: 2
    maxItems: 32

  dma-names:
    description:
      There must be at least one channel named "tx" for transmit and named "rx"
      for receive.
    minItems: 2
    maxItems: 32
    additionalItems: true
    items:

Annotation

Implementation Notes