Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml
Extension
.yaml
Size
3267 bytes
Lines
137
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-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/arm/arm,coresight-dynamic-funnel.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Arm CoreSight Programmable Trace Bus Funnel

maintainers:
  - Mathieu Poirier <mathieu.poirier@linaro.org>
  - Mike Leach <mike.leach@linaro.org>
  - Leo Yan <leo.yan@linaro.org>
  - Suzuki K Poulose <suzuki.poulose@arm.com>

description: |
  CoreSight components are compliant with the ARM CoreSight architecture
  specification and can be connected in various topologies to suit a particular
  SoCs tracing needs. These trace components can generally be classified as
  sinks, links and sources. Trace data produced by one or more sources flows
  through the intermediate links connecting the source to the currently selected
  sink.

  The Coresight funnel merges 2-8 trace sources into a single trace
  stream with programmable enable and priority of input ports.

# Need a custom select here or 'arm,primecell' will match on lots of nodes
select:
  properties:
    compatible:
      contains:
        const: arm,coresight-dynamic-funnel
  required:
    - compatible

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

properties:
  compatible:
    items:
      - const: arm,coresight-dynamic-funnel
      - const: arm,primecell

  reg:
    maxItems: 1

  clocks:
    minItems: 1
    maxItems: 2

  clock-names:
    minItems: 1
    items:
      - const: apb_pclk
      - const: atclk

  power-domains:
    maxItems: 1

  label:
    description:
      Description of a coresight device.

  in-ports:
    $ref: /schemas/graph.yaml#/properties/ports

    patternProperties:
      '^port(@[0-7])?$':
        description: Input connections from CoreSight Trace bus
        $ref: /schemas/graph.yaml#/properties/port

Annotation

Implementation Notes