0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 # Copyright 2020 Unisoc Inc.
0003 %YAML 1.2
0004 ---
0005 $id: http://devicetree.org/schemas/iommu/sprd,iommu.yaml#
0006 $schema: http://devicetree.org/meta-schemas/core.yaml#
0007
0008 title: Unisoc IOMMU and Multi-media MMU
0009
0010 maintainers:
0011 - Chunyan Zhang <zhang.lyra@gmail.com>
0012
0013 properties:
0014 compatible:
0015 enum:
0016 - sprd,iommu-v1
0017
0018 "#iommu-cells":
0019 const: 0
0020 description:
0021 Unisoc IOMMUs are all single-master IOMMU devices, therefore no
0022 additional information needs to associate with its master device.
0023 Please refer to the generic bindings document for more details,
0024 Documentation/devicetree/bindings/iommu/iommu.txt
0025
0026 reg:
0027 maxItems: 1
0028
0029 clocks:
0030 description:
0031 Reference to a gate clock phandle, since access to some of IOMMUs are
0032 controlled by gate clock, but this is not required.
0033
0034 required:
0035 - compatible
0036 - reg
0037 - "#iommu-cells"
0038
0039 additionalProperties: false
0040
0041 examples:
0042 - |
0043 iommu_disp: iommu@63000800 {
0044 compatible = "sprd,iommu-v1";
0045 reg = <0x63000800 0x80>;
0046 #iommu-cells = <0>;
0047 };
0048
0049 - |
0050 iommu_jpg: iommu@62300300 {
0051 compatible = "sprd,iommu-v1";
0052 reg = <0x62300300 0x80>;
0053 #iommu-cells = <0>;
0054 clocks = <&mm_gate 1>;
0055 };
0056
0057 ...
