a08bd8df97
This DART variant is found in the t8103 (M1) SoCs and used for the USB4/Thunderbolt PCIe ports. Unlike the regular t8103 DART these support up to 64 SIDs and require a slightly different MMIO layout. Acked-by: Hector Martin <marcan@marcan.st> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Sven Peter <sven@svenpeter.dev> Link: https://lore.kernel.org/r/20231126151701.16534-2-sven@svenpeter.dev Signed-off-by: Joerg Roedel <jroedel@suse.de>
89 lines
1.9 KiB
YAML
89 lines
1.9 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iommu/apple,dart.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Apple DART IOMMU
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maintainers:
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- Sven Peter <sven@svenpeter.dev>
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description: |+
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Apple SoCs may contain an implementation of their Device Address
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Resolution Table which provides a mandatory layer of address
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translations for various masters.
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Each DART instance is capable of handling up to 16 different streams
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with individual pagetables and page-level read/write protection flags.
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This DART IOMMU also raises interrupts in response to various
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fault conditions.
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properties:
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compatible:
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enum:
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- apple,t8103-dart
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- apple,t8103-usb4-dart
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- apple,t8110-dart
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- apple,t6000-dart
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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description:
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Reference to the gate clock phandle if required for this IOMMU.
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Optional since not all IOMMUs are attached to a clock gate.
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'#iommu-cells':
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const: 1
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description:
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Has to be one. The single cell describes the stream id emitted by
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a master to the IOMMU.
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power-domains:
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maxItems: 1
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required:
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- compatible
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- reg
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- '#iommu-cells'
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- interrupts
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additionalProperties: false
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examples:
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- |+
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dart1: iommu@82f80000 {
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compatible = "apple,t8103-dart";
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reg = <0x82f80000 0x4000>;
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interrupts = <1 781 4>;
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#iommu-cells = <1>;
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};
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master1 {
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iommus = <&dart1 0>;
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};
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- |+
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dart2a: iommu@82f00000 {
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compatible = "apple,t8103-dart";
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reg = <0x82f00000 0x4000>;
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interrupts = <1 781 4>;
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#iommu-cells = <1>;
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};
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dart2b: iommu@82f80000 {
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compatible = "apple,t8103-dart";
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reg = <0x82f80000 0x4000>;
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interrupts = <1 781 4>;
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#iommu-cells = <1>;
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};
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master2 {
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iommus = <&dart2a 0>, <&dart2b 1>;
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};
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