From: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Date: Tue, 19 May 2026 07:41:00 +0000 (+0200)
Subject: dt-bindings: arm-smmu: Constrain clocks for newer Qualcomm variants
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=75949eb0265387ba004744320e9bfbc0b918be5e;p=thirdparty%2Fkernel%2Flinux.git

dt-bindings: arm-smmu: Constrain clocks for newer Qualcomm variants

Many of SMMU on Qualcomm SoCs come in two flavors using the same front
compatible but a bit different fallback:

1. For application processor, usually without any controllable
   clocks,

2. For the Adreno GPU, with some controllable clock(s) and using
   additionally qcom,adreno-smmu fallback compatible.

Add missing constraints for Glymur SMMU on Adreno GPU and several other
Qualcomm SMMUs for application processors, to restrict the clocks
property to a specific length.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Shawn Guo <shengchao.guo@oss.qualcomm.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Will Deacon <will@kernel.org>
---

diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
index 67c7a9207c98f..25fd3efa24200 100644
--- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
+++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
@@ -599,6 +599,7 @@ allOf:
               - qcom,sdm845-smmu-500
               - qcom,sdx55-smmu-500
               - qcom,sdx65-smmu-500
+              - qcom,sdx75-smmu-500
               - qcom,sm6350-smmu-500
               - qcom,sm6375-smmu-500
     then:
@@ -606,6 +607,39 @@ allOf:
         clock-names: false
         clocks: false
 
+  # Disallow clocks for all other platforms where specific compatible is used
+  # with different fallbacks and only one combination has no clocks
+  - if:
+      properties:
+        compatible:
+          items:
+            - enum:
+                - qcom,eliza-smmu-500
+                - qcom,glymur-smmu-500
+                - qcom,kaanapali-smmu-500
+                - qcom,milos-smmu-500
+                - qcom,qcs615-smmu-500
+                - qcom,qcs8300-smmu-500
+                - qcom,sa8775p-smmu-500
+                - qcom,sm6115-smmu-500
+                - qcom,sm6125-smmu-500
+                - qcom,sm6350-smmu-500
+                - qcom,sm6375-smmu-500
+                - qcom,sm8150-smmu-500
+                - qcom,sm8250-smmu-500
+                - qcom,sm8350-smmu-500
+                - qcom,sm8450-smmu-500
+                - qcom,sm8550-smmu-500
+                - qcom,sm8650-smmu-500
+                - qcom,sm8750-smmu-500
+                - qcom,x1e80100-smmu-500
+            - const: qcom,smmu-500
+            - const: arm,mmu-500
+    then:
+      properties:
+        clock-names: false
+        clocks: false
+
   - if:
       properties:
         compatible: