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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:
enum:
- apple,t8103-dart
- apple,t8103-usb4-dart
- apple,t8110-dart
- apple,t6000-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.
power-domains:
maxItems:
1
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>;
};