From: Miles Chen <miles.chen@mediatek.com>
To: Joerg Roedel <joro@8bytes.org>, Rob Herring <robh+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>
Cc: <iommu@lists.linux-foundation.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>, <wsd_upstream@mediatek.com>,
Yong Wu <yong.wu@mediatek.com>, Chao Hao <chao.hao@mediatek.com>,
Yingjoe Chen <yingjoe.chen@mediatek.com>,
Miles Chen <miles.chen@mediatek.com>
Subject: [PATCH 1/4] dt-bindings: mediatek: add mediatek,infracfg phandle
Date: Thu, 2 Jul 2020 17:37:17 +0800 [thread overview]
Message-ID: <20200702093721.6063-1-miles.chen@mediatek.com> (raw)
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
next reply other threads:[~2020-07-02 9:37 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-02 9:37 Miles Chen [this message]
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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