diff --git a/arch/arm64/boot/dts/qcom/qcs404.dtsi b/arch/arm64/boot/dts/qcom/qcs404.dtsi
index 6bc0925acda9..133bcd36f926 100644
--- a/arch/arm64/boot/dts/qcom/qcs404.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs404.dtsi
@@ -257,4 +257,64 @@
 			     <GIC_PPI 4 0xff08>,
 			     <GIC_PPI 1 0xff08>;
 	};
+
+	smp2p-adsp {
+		compatible = "qcom,smp2p";
+		qcom,smem = <443>, <429>;
+		interrupts = <GIC_SPI 291 IRQ_TYPE_EDGE_RISING>;
+		mboxes = <&apcs_glb 10>;
+		qcom,local-pid = <0>;
+		qcom,remote-pid = <2>;
+
+		adsp_smp2p_out: master-kernel {
+			qcom,entry-name = "master-kernel";
+			#qcom,smem-state-cells = <1>;
+		};
+
+		adsp_smp2p_in: slave-kernel {
+			qcom,entry-name = "slave-kernel";
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+	};
+
+	smp2p-cdsp {
+		compatible = "qcom,smp2p";
+		qcom,smem = <94>, <432>;
+		interrupts = <GIC_SPI 143 IRQ_TYPE_EDGE_RISING>;
+		mboxes = <&apcs_glb 14>;
+		qcom,local-pid = <0>;
+		qcom,remote-pid = <5>;
+
+		cdsp_smp2p_out: master-kernel {
+			qcom,entry-name = "master-kernel";
+			#qcom,smem-state-cells = <1>;
+		};
+
+		cdsp_smp2p_in: slave-kernel {
+			qcom,entry-name = "slave-kernel";
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+	};
+
+	smp2p-wcss {
+		compatible = "qcom,smp2p";
+		qcom,smem = <435>, <428>;
+		interrupts = <GIC_SPI 158 IRQ_TYPE_EDGE_RISING>;
+		mboxes = <&apcs_glb 18>;
+		qcom,local-pid = <0>;
+		qcom,remote-pid = <1>;
+
+		wcss_smp2p_out: master-kernel {
+			qcom,entry-name = "master-kernel";
+			#qcom,smem-state-cells = <1>;
+		};
+
+		wcss_smp2p_in: slave-kernel {
+			qcom,entry-name = "slave-kernel";
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+	};
 };