From: Thierry Reding <thierry.reding@gmail.com>
To: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org, Jon Hunter <jonathanh@nvidia.com>,
iommu@lists.linux-foundation.org,
Thierry Reding <thierry.reding@gmail.com>,
linux-tegra@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/4] dt-bindings: arm-smmu: Document nvidia, memory-controller property
Date: Fri, 12 Nov 2021 14:12:28 +0100 [thread overview]
Message-ID: <20211112131231.3683098-2-thierry.reding@gmail.com> (raw)
In-Reply-To: <20211112131231.3683098-1-thierry.reding@gmail.com>
From: Thierry Reding <treding@nvidia.com>
On NVIDIA SoC's the ARM SMMU needs to interact with the memory
controller in order to map memory clients to the corresponding stream
IDs. Document how the nvidia,memory-controller property can be used to
achieve this.
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
Documentation/devicetree/bindings/iommu/arm,smmu.yaml | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
index f66a3effba73..cf32a7955475 100644
--- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
+++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
@@ -155,6 +155,12 @@ properties:
power-domains:
maxItems: 1
+ nvidia,memory-controller:
+ description: A phandle to the memory controller on NVIDIA Tegra186
+ and later SoCs. The memory controller needs to be programmed with
+ a mapping of memory client IDs to ARM SMMU stream IDs.
+ $ref: /schemas/types.yaml#/definitions/phandle
+
required:
- compatible
- reg
@@ -177,6 +183,9 @@ allOf:
reg:
minItems: 1
maxItems: 2
+
+ required:
+ - nvidia,memory-controller
else:
properties:
reg:
--
2.33.1
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next prev parent reply other threads:[~2021-11-12 13:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-12 13:12 [PATCH 0/4] iommu/arm-smmu: Support Tegra234 SMMU Thierry Reding
2021-11-12 13:12 ` Thierry Reding [this message]
2021-11-29 21:03 ` [PATCH 1/4] dt-bindings: arm-smmu: Document nvidia,memory-controller property Rob Herring
2021-11-12 13:12 ` [PATCH 2/4] dt-bindings: arm-smmu: Add compatible for Tegra234 SOC Thierry Reding
2021-11-29 21:03 ` Rob Herring
2021-11-12 13:12 ` [PATCH 3/4] iommu/arm-smmu: Support Tegra234 SMMU Thierry Reding
2021-11-12 13:12 ` [PATCH 4/4] arm64: tegra: Add Tegra234 IOMMUs Thierry Reding
2021-11-12 13:43 ` [PATCH 0/4] iommu/arm-smmu: Support Tegra234 SMMU Robin Murphy
2021-11-12 14:56 ` Thierry Reding
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