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...@mediatek.com>
Signed-off-by: Miles Chen <miles.c...@mediatek.com>
---
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
--
2.18.0
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