Bindings/iommu/apple,dart.yaml

   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     };