xref: /linux/Documentation/devicetree/bindings/iommu/apple,dart.yaml (revision 4b132aacb0768ac1e652cf517097ea6f237214b9) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/iommu/apple,dart.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Apple DART IOMMU
8
9maintainers:
10  - Sven Peter <sven@svenpeter.dev>
11
12description: |+
13  Apple SoCs may contain an implementation of their Device Address
14  Resolution Table which provides a mandatory layer of address
15  translations for various masters.
16
17  Each DART instance is capable of handling up to 16 different streams
18  with individual pagetables and page-level read/write protection flags.
19
20  This DART IOMMU also raises interrupts in response to various
21  fault conditions.
22
23properties:
24  compatible:
25    enum:
26      - apple,t8103-dart
27      - apple,t8103-usb4-dart
28      - apple,t8110-dart
29      - apple,t6000-dart
30
31  reg:
32    maxItems: 1
33
34  interrupts:
35    maxItems: 1
36
37  clocks:
38    description:
39      Reference to the gate clock phandle if required for this IOMMU.
40      Optional since not all IOMMUs are attached to a clock gate.
41
42  '#iommu-cells':
43    const: 1
44    description:
45      Has to be one. The single cell describes the stream id emitted by
46      a master to the IOMMU.
47
48  power-domains:
49    maxItems: 1
50
51required:
52  - compatible
53  - reg
54  - '#iommu-cells'
55  - interrupts
56
57additionalProperties: false
58
59examples:
60  - |+
61    dart1: iommu@82f80000 {
62      compatible = "apple,t8103-dart";
63      reg = <0x82f80000 0x4000>;
64      interrupts = <1 781 4>;
65      #iommu-cells = <1>;
66    };
67
68    master1 {
69      iommus = <&dart1 0>;
70    };
71
72  - |+
73    dart2a: iommu@82f00000 {
74      compatible = "apple,t8103-dart";
75      reg = <0x82f00000 0x4000>;
76      interrupts = <1 781 4>;
77      #iommu-cells = <1>;
78    };
79    dart2b: iommu@82f80000 {
80      compatible = "apple,t8103-dart";
81      reg = <0x82f80000 0x4000>;
82      interrupts = <1 781 4>;
83      #iommu-cells = <1>;
84    };
85
86    master2 {
87      iommus = <&dart2a 0>, <&dart2b 1>;
88    };
89