Documentation/devicetree/bindings/dma/fsl-qdma.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/dma/fsl-qdma.yaml

File Facts

System: Linux kernel
Corpus path: Documentation/devicetree/bindings/dma/fsl-qdma.yaml
Extension: .yaml
Size: 3240 bytes
Lines: 136
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

dt-bindings/interrupt-controller/arm-gic.h

Detected Declarations

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

Annotated Snippet

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/fsl-qdma.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NXP Layerscape SoC qDMA Controller

maintainers:
  - Frank Li <Frank.Li@nxp.com>

properties:
  compatible:
    oneOf:
      - const: fsl,ls1021a-qdma
      - items:
          - enum:
              - fsl,ls1028a-qdma
              - fsl,ls1043a-qdma
              - fsl,ls1046a-qdma
          - const: fsl,ls1021a-qdma

  reg:
    items:
      - description: Controller regs
      - description: Status regs
      - description: Block regs

  interrupts:
    minItems: 2
    maxItems: 5

  interrupt-names:
    minItems: 2
    items:
      - const: qdma-error
      - const: qdma-queue0
      - const: qdma-queue1
      - const: qdma-queue2
      - const: qdma-queue3

  dma-channels:
    minimum: 1
    maximum: 64

  fsl,dma-queues:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: Should contain number of queues supported.
    minimum: 1
    maximum: 4

  block-number:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: the virtual block number

  block-offset:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: the offset of different virtual block

  status-sizes:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: status queue size of per virtual block

  queue-sizes:
    $ref: /schemas/types.yaml#/definitions/uint32-array
    description:
      command queue size of per virtual block, the size number
      based on queues

  big-endian:

Annotation

Immediate include surface: `dt-bindings/interrupt-controller/arm-gic.h`.
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.