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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iommu/apple,dart.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Apple DART IOMMU
maintainers:
- Sven Peter <sven@svenpeter.dev>
description: |+
Apple SoCs may contain an implementation of their Device Address
Resolution Table which provides a mandatory layer of address
translations for various masters.
Each DART instance is capable of handling up to 16 different streams
with individual pagetables and page-level read/write protection flags.
This DART IOMMU also raises interrupts in response to various
fault conditions.
properties:
compatible:
const: apple,t8103-dart
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
description:
Reference to the gate clock phandle if required for this IOMMU.
Optional since not all IOMMUs are attached to a clock gate.
'#iommu-cells':
const: 1
description:
Has to be one. The single cell describes the stream id emitted by
a master to the IOMMU.
required:
- compatible
- reg
- '#iommu-cells'
- interrupts
additionalProperties: false
examples:
- |+
dart1: iommu@82f80000 {
compatible = "apple,t8103-dart";
reg = <0x82f80000 0x4000>;
interrupts = <1 781 4>;
#iommu-cells = <1>;
};
master1 {
iommus = <&dart1 0>;
};
- |+
dart2a: iommu@82f00000 {
compatible = "apple,t8103-dart";
reg = <0x82f00000 0x4000>;
interrupts = <1 781 4>;
#iommu-cells = <1>;
};
dart2b: iommu@82f80000 {
compatible = "apple,t8103-dart";
reg = <0x82f80000 0x4000>;
interrupts = <1 781 4>;
#iommu-cells = <1>;
};
master2 {
iommus = <&dart2a 0>, <&dart2b 1>;
};
|
