[PATCH v11 08/14] dt-bindings: iommu: rockchip: describe the RK3576 NPU MMU
From: Jiaxing Hu <hidden>
Date: 2026-08-31 08:21:28
Also in:
dri-devel, linux-devicetree, linux-iommu, linux-pm, linux-rockchip, lkml
Subsystem:
iommu subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Joerg Roedel, Will Deacon, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
The RK3576 NPU MMUs are rk3568-iommu compatible but take five clocks where every other Rockchip MMU takes two, the extra three being the compute clock and the two convolution buffer clocks. Give them a compatible of their own and pin both sides with an allOf, so that an rk3568-iommu cannot carry five clocks and an NPU MMU cannot carry two. Describing the extra clocks as belonging to one SoC without saying so in the schema, which is what a comment on a description does, leaves both of those spellings valid. Signed-off-by: Jiaxing Hu <redacted> Acked-by: Conor Dooley <conor.dooley@microchip.com> --- .../bindings/iommu/rockchip,iommu.yaml | 28 +++++++++++++++++++ 1 file changed, 28 insertions(+)
diff --git a/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml b/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml
index 6ce41d11f..83d7e7c8e 100644
--- a/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml
+++ b/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml@@ -26,6 +26,7 @@ properties: - items: - enum: - rockchip,rk3576-iommu + - rockchip,rk3576-npu-iommu - rockchip,rk3588-iommu - const: rockchip,rk3568-iommu
@@ -42,14 +43,22 @@ properties: minItems: 1 clocks: + minItems: 2 items: - description: Core clock - description: Interface clock + - description: Compute clock + - description: Convolution buffer core clock + - description: Convolution buffer interface clock clock-names: + minItems: 2 items: - const: aclk - const: iface + - const: npu + - const: aclk_cbuf + - const: hclk_cbuf "#iommu-cells": const: 0
@@ -72,6 +81,25 @@ required: - clock-names - "#iommu-cells" +allOf: + - if: + properties: + compatible: + contains: + const: rockchip,rk3576-npu-iommu + then: + properties: + clocks: + minItems: 5 + clock-names: + minItems: 5 + else: + properties: + clocks: + maxItems: 2 + clock-names: + maxItems: 2 + additionalProperties: false examples:
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2.43.0