Documentation/devicetree/bindings/misc/intel,ixp4xx-ahb-queue-manager.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/misc/intel,ixp4xx-ahb-queue-manager.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/misc/intel,ixp4xx-ahb-queue-manager.yaml
Extension
.yaml
Size
1450 bytes
Lines
52
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.

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Annotated Snippet

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
# Copyright 2019 Linaro Ltd.
%YAML 1.2
---
$id: http://devicetree.org/schemas/misc/intel,ixp4xx-ahb-queue-manager.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Intel IXP4xx AHB Queue Manager

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

description: |
  The IXP4xx AHB Queue Manager maintains queues as circular buffers in
  an 8KB embedded SRAM along with hardware pointers. It is used by both
  the XScale processor and the NPEs (Network Processing Units) in the
  IXP4xx for accelerating queues, especially for networking. Clients pick
  queues from the queue manager with foo-queue = <&qmgr N> where the
  &qmgr is a phandle to the queue manager and N is the queue resource
  number. The queue resources available and their specific purpose
  on a certain IXP4xx system will vary.

properties:
  compatible:
    items:
      - const: intel,ixp4xx-ahb-queue-manager

  reg:
    maxItems: 1

  interrupts:
    items:
      - description: Interrupt for queues 0-31
      - description: Interrupt for queues 32-63

required:
  - compatible
  - reg
  - interrupts

additionalProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/irq.h>

    qmgr: queue-manager@60000000 {
        compatible = "intel,ixp4xx-ahb-queue-manager";
        reg = <0x60000000 0x4000>;
        interrupts = <3 IRQ_TYPE_LEVEL_HIGH>, <4 IRQ_TYPE_LEVEL_HIGH>;
    };

Annotation

Implementation Notes