Commit 13d190ff authored by Chunyan Zhang's avatar Chunyan Zhang Committed by Joerg Roedel
Browse files

dt-bindings: iommu: add bindings for sprd IOMMU 



This IOMMU module can be used by Unisoc's multimedia devices, such as
display, Image codec(jpeg) and a few signal processors, including
VSP(video), GSP(graphic), ISP(image), and CPP(camera pixel processor), etc.

Signed-off-by: default avatarChunyan Zhang <chunyan.zhang@unisoc.com>
Link: https://lore.kernel.org/r/20210305093216.201897-2-zhang.lyra@gmail.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 1e28eed1

Documentation/devicetree/bindings/iommu/sprd,iommu.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

# Copyright 2020 Unisoc Inc.

%YAML 1.2

---

$id: http://devicetree.org/schemas/iommu/sprd,iommu.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: Unisoc IOMMU and Multi-media MMU



maintainers:

  - Chunyan Zhang <zhang.lyra@gmail.com>



properties:

  compatible:

    enum:

      - sprd,iommu-v1



  "#iommu-cells":

    const: 0

    description:

      Unisoc IOMMUs are all single-master IOMMU devices, therefore no

      additional information needs to associate with its master device.

      Please refer to the generic bindings document for more details,

      Documentation/devicetree/bindings/iommu/iommu.txt



  reg:

    maxItems: 1



  clocks:

    description:

      Reference to a gate clock phandle, since access to some of IOMMUs are

      controlled by gate clock, but this is not required.



required:

  - compatible

  - reg

  - "#iommu-cells"



additionalProperties: false



examples:

  - |

    iommu_disp: iommu@63000800 {

      compatible = "sprd,iommu-v1";

      reg = <0x63000800 0x80>;

      #iommu-cells = <0>;

    };



  - |

    iommu_jpg: iommu@62300300 {

      compatible = "sprd,iommu-v1";

      reg = <0x62300300 0x80>;

      #iommu-cells = <0>;

      clocks = <&mm_gate 1>;

    };



...