[PATCH 1/4] dt-bindings: mediatek: add mediatek,infracfg phandle
From: Miles Chen <hidden>
Date: 2020-07-02 09:37:34
Also in:
linux-arm-kernel, linux-iommu, linux-mediatek, lkml
Subsystem:
iommu subsystem, mediatek iommu driver, open firmware and flattened device tree bindings, the rest · Maintainers:
Joerg Roedel, Will Deacon, Yong Wu, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Add a description for mediatek,infracfg. We can check if 4GB mode is enable by reading it instead of checking the unexported symbol "max_pfn". This is a step towards building mtk_iommu as a kernel module. Cc: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Miles Chen <redacted> --- Documentation/devicetree/bindings/iommu/mediatek,iommu.txt | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt b/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
index ce59a505f5a4..a7881deabcca 100644
--- a/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
+++ b/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt@@ -74,6 +74,8 @@ Required properties: - mediatek,larbs : List of phandle to the local arbiters in the current Socs. Refer to bindings/memory-controllers/mediatek,smi-larb.txt. It must sort according to the local arbiter index, like larb0, larb1, larb2... +- mediatek,infracfg: a phandle to infracfg. It is used to confirm if 4GB mode is set. + It is an optional property, add it when the SoC have 4g mode. - iommu-cells : must be 1. This is the mtk_m4u_id according to the HW. Specifies the mtk_m4u_id as defined in dt-binding/memory/mt2701-larb-port.h for mt2701, mt7623
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2.18.0