diff --git a/qcom/sa6155-adp-common.dtsi b/qcom/sa6155-adp-common.dtsi
index ba24c846e482..ff92a862d999 100644
--- a/qcom/sa6155-adp-common.dtsi
+++ b/qcom/sa6155-adp-common.dtsi
@@ -150,6 +150,7 @@
 		ethqos_emb_smmu: ethqos_emb_smmu {
 			compatible = "qcom,emac-smmu-embedded";
 			iommus = <&apps_smmu 0x1C0 0x0>;
+			qcom,iommu-dma = "fastmap";
 			qcom,iommu-dma-addr-pool = <0x80000000 0x40000000>;
 		};
 	};