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* [PATCH 1/4] dt-bindings: mediatek: add mediatek,infracfg phandle
@ 2020-07-02  9:37 Miles Chen
  2020-07-02  9:37 ` [PATCH 2/4] arm64: dts: mt2712: add mediatek,infracfg to iommu Miles Chen
                   ` (3 more replies)
  0 siblings, 4 replies; 8+ messages in thread
From: Miles Chen @ 2020-07-02  9:37 UTC (permalink / raw)
  To: Joerg Roedel, Rob Herring, Matthias Brugger
  Cc: devicetree, wsd_upstream, linux-kernel, Chao Hao, iommu,
	linux-mediatek, Miles Chen, Yingjoe Chen, linux-arm-kernel

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 <miles.chen@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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^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2020-07-17  8:26 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-02  9:37 [PATCH 1/4] dt-bindings: mediatek: add mediatek,infracfg phandle Miles Chen
2020-07-02  9:37 ` [PATCH 2/4] arm64: dts: mt2712: add mediatek,infracfg to iommu Miles Chen
2020-07-02  9:37 ` [PATCH 3/4] arm64: dts: mt8173: " Miles Chen
2020-07-02  9:37 ` [PATCH 4/4] iommu/mediatek: check 4GB mode by reading infracfg Miles Chen
2020-07-15 21:05   ` Matthias Brugger
2020-07-17  8:26     ` Miles Chen
2020-07-15 20:51 ` [PATCH 1/4] dt-bindings: mediatek: add mediatek,infracfg phandle Rob Herring
2020-07-17  8:18   ` Miles Chen

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