diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
index f66a3effba73..4804cfde8655 100644
--- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
+++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
@@ -38,6 +38,7 @@ properties:
               - qcom,sc7280-smmu-500
               - qcom,sc8180x-smmu-500
               - qcom,sdm845-smmu-500
+              - qcom,sdx55-smmu-500
               - qcom,sm6350-smmu-500
               - qcom,sm8150-smmu-500
               - qcom,sm8250-smmu-500