apple,dart.yaml

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    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     const: apple,t8103-dart
   26 
   27   reg:
   28     maxItems: 1
   29 
   30   interrupts:
   31     maxItems: 1
   32 
   33   clocks:
   34     description:
   35       Reference to the gate clock phandle if required for this IOMMU.
   36       Optional since not all IOMMUs are attached to a clock gate.
   37 
   38   '#iommu-cells':
   39     const: 1
   40     description:
   41       Has to be one. The single cell describes the stream id emitted by
   42       a master to the IOMMU.
   43 
   44   power-domains:
   45     maxItems: 1
   46 
   47 required:
   48   - compatible
   49   - reg
   50   - '#iommu-cells'
   51   - interrupts
   52 
   53 additionalProperties: false
   54 
   55 examples:
   56   - |+
   57     dart1: iommu@82f80000 {
   58       compatible = "apple,t8103-dart";
   59       reg = <0x82f80000 0x4000>;
   60       interrupts = <1 781 4>;
   61       #iommu-cells = <1>;
   62     };
   63 
   64     master1 {
   65       iommus = <&dart1 0>;
   66     };
   67 
   68   - |+
   69     dart2a: iommu@82f00000 {
   70       compatible = "apple,t8103-dart";
   71       reg = <0x82f00000 0x4000>;
   72       interrupts = <1 781 4>;
   73       #iommu-cells = <1>;
   74     };
   75     dart2b: iommu@82f80000 {
   76       compatible = "apple,t8103-dart";
   77       reg = <0x82f80000 0x4000>;
   78       interrupts = <1 781 4>;
   79       #iommu-cells = <1>;
   80     };
   81 
   82     master2 {
   83       iommus = <&dart2a 0>, <&dart2b 1>;
   84     };

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sys/contrib/device-tree/Bindings/iommu/apple,dart.yaml