| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 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 | |
| 7 | title: Apple DART IOMMU |
| 8 | |
| 9 | maintainers: |
| 10 | - Sven Peter <sven@svenpeter.dev> |
| 11 | |
| 12 | description: |+ |
| 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 | |
| 23 | properties: |
| 24 | compatible: |
| 25 | enum: |
| 26 | - apple,t8103-dart |
| 27 | - apple,t8110-dart |
| 28 | - apple,t6000-dart |
| 29 | |
| 30 | reg: |
| 31 | maxItems: 1 |
| 32 | |
| 33 | interrupts: |
| 34 | maxItems: 1 |
| 35 | |
| 36 | clocks: |
| 37 | description: |
| 38 | Reference to the gate clock phandle if required for this IOMMU. |
| 39 | Optional since not all IOMMUs are attached to a clock gate. |
| 40 | |
| 41 | '#iommu-cells': |
| 42 | const: 1 |
| 43 | description: |
| 44 | Has to be one. The single cell describes the stream id emitted by |
| 45 | a master to the IOMMU. |
| 46 | |
| 47 | power-domains: |
| 48 | maxItems: 1 |
| 49 | |
| 50 | required: |
| 51 | - compatible |
| 52 | - reg |
| 53 | - '#iommu-cells' |
| 54 | - interrupts |
| 55 | |
| 56 | additionalProperties: false |
| 57 | |
| 58 | examples: |
| 59 | - |+ |
| 60 | dart1: iommu@82f80000 { |
| 61 | compatible = "apple,t8103-dart"; |
| 62 | reg = <0x82f80000 0x4000>; |
| 63 | interrupts = <1 781 4>; |
| 64 | #iommu-cells = <1>; |
| 65 | }; |
| 66 | |
| 67 | master1 { |
| 68 | iommus = <&dart1 0>; |
| 69 | }; |
| 70 | |
| 71 | - |+ |
| 72 | dart2a: iommu@82f00000 { |
| 73 | compatible = "apple,t8103-dart"; |
| 74 | reg = <0x82f00000 0x4000>; |
| 75 | interrupts = <1 781 4>; |
| 76 | #iommu-cells = <1>; |
| 77 | }; |
| 78 | dart2b: iommu@82f80000 { |
| 79 | compatible = "apple,t8103-dart"; |
| 80 | reg = <0x82f80000 0x4000>; |
| 81 | interrupts = <1 781 4>; |
| 82 | #iommu-cells = <1>; |
| 83 | }; |
| 84 | |
| 85 | master2 { |
| 86 | iommus = <&dart2a 0>, <&dart2b 1>; |
| 87 | }; |