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