linux-kernel - [PATCH v11 4/5] dt-bindings: arm-smmu: add binding for Tegra194 SMMU

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Message-ID: <20200718193457.30046-5-vdumpa@nvidia.com>
Date:   Sat, 18 Jul 2020 12:34:56 -0700
From:   Krishna Reddy <vdumpa@...dia.com>
To:     <joro@...tes.org>, <will@...nel.org>, <robin.murphy@....com>,
        <robh+dt@...nel.org>, <treding@...dia.com>, <jonathanh@...dia.com>
CC:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>, <linux-kernel@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, <yhsu@...dia.com>,
        <snikam@...dia.com>, <praithatha@...dia.com>, <talho@...dia.com>,
        <bbiswas@...dia.com>, <mperttunen@...dia.com>,
        <nicolinc@...dia.com>, <bhuntsman@...dia.com>,
        <nicoleotsuka@...il.com>, Krishna Reddy <vdumpa@...dia.com>,
        Rob Herring <robh@...nel.org>
Subject: [PATCH v11 4/5] dt-bindings: arm-smmu: add binding for Tegra194 SMMU

Add binding for NVIDIA's Tegra194 SoC SMMU.

Reviewed-by: Jon Hunter <jonathanh@...dia.com>
Reviewed-by: Rob Herring <robh@...nel.org>
Reviewed-by: Robin Murphy <robin.murphy@....com>
Signed-off-by: Krishna Reddy <vdumpa@...dia.com>
---
 .../devicetree/bindings/iommu/arm,smmu.yaml   | 25 ++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
index 93fb9fe068b9..503160a7b9a0 100644
--- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
+++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
@@ -44,6 +44,11 @@ properties:
         items:
           - const: marvell,ap806-smmu-500
           - const: arm,mmu-500
+      - description: NVIDIA SoCs that program two ARM MMU-500s identically
+        items:
+          - enum:
+              - nvidia,tegra194-smmu
+          - const: nvidia,smmu-500
       - items:
           - const: arm,mmu-500
           - const: arm,smmu-v2
@@ -61,7 +66,8 @@ properties:
           - cavium,smmu-v2
 
   reg:
-    maxItems: 1
+    minItems: 1
+    maxItems: 2
 
   '#global-interrupts':
     description: The number of global interrupts exposed by the device.
@@ -144,6 +150,23 @@ required:
 
 additionalProperties: false
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nvidia,tegra194-smmu
+    then:
+      properties:
+        reg:
+          minItems: 2
+          maxItems: 2
+    else:
+      properties:
+        reg:
+          maxItems: 1
+
 examples:
   - |+
     /* SMMU with stream matching or stream indexing */
-- 
2.26.2