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Subject[RFC PATCH 1/2] dt-bindings: iommu: add bindings for sprd iommu
Date
From: Chunyan Zhang <chunyan.zhang@unisoc.com>

This patch only adds bindings to support display iommu, support for others
would be added once finished tests with those devices, such as Image
codec(jpeg) processor, a few signal processors, including VSP(video),
GSP(graphic), ISP(image), and camera CPP, etc.

Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
---
.../devicetree/bindings/iommu/sprd,iommu.yaml | 44 +++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iommu/sprd,iommu.yaml

diff --git a/Documentation/devicetree/bindings/iommu/sprd,iommu.yaml b/Documentation/devicetree/bindings/iommu/sprd,iommu.yaml
new file mode 100644
index 000000000000..4d9a578a7cc9
--- /dev/null
+++ b/Documentation/devicetree/bindings/iommu/sprd,iommu.yaml
@@ -0,0 +1,44 @@
+# 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-disp
+
+ reg:
+ maxItems: 1
+
+ "#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
+
+required:
+ - compatible
+ - reg
+ - "#iommu-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ iommu_disp: iommu@63000000 {
+ compatible = "sprd,iommu-disp";
+ reg = <0x63000000 0x880>;
+ #iommu-cells = <0>;
+ };
+
+...
--
2.25.1
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