Documentation/devicetree/bindings/iommu/qcom,iommu.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/iommu/qcom,iommu.yaml

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System
Linux kernel
Corpus path
Documentation/devicetree/bindings/iommu/qcom,iommu.yaml
Extension
.yaml
Size
3055 bytes
Lines
133
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/iommu/qcom,iommu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Qualcomm Technologies legacy IOMMU implementations

maintainers:
  - Konrad Dybcio <konradybcio@kernel.org>

description: |
  Qualcomm "B" family devices which are not compatible with arm-smmu have
  a similar looking IOMMU, but without access to the global register space
  and optionally requiring additional configuration to route context IRQs
  to non-secure vs secure interrupt line.

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - qcom,msm8916-iommu
              - qcom,msm8917-iommu
              - qcom,msm8937-iommu
              - qcom,msm8953-iommu
          - const: qcom,msm-iommu-v1
      - items:
          - enum:
              - qcom,msm8953-iommu
              - qcom,msm8976-iommu
          - const: qcom,msm-iommu-v2

  clocks:
    minItems: 2
    items:
      - description: Clock required for IOMMU register group access
      - description: Clock required for underlying bus access
      - description: Clock required for Translation Buffer Unit access

  clock-names:
    minItems: 2
    items:
      - const: iface
      - const: bus
      - const: tbu

  power-domains:
    maxItems: 1

  reg:
    maxItems: 1

  ranges: true

  qcom,iommu-secure-id:
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      The SCM secure ID of the IOMMU instance.

  '#address-cells':
    const: 1

  '#size-cells':
    const: 1

  '#iommu-cells':
    const: 1

patternProperties:

Annotation

Implementation Notes