diff --git a/arch/arm64/boot/dts/qcom/qcs615.dtsi b/arch/arm64/boot/dts/qcom/qcs615.dtsi
index 559d3a4ba605..6b1c4623530b 100644
--- a/arch/arm64/boot/dts/qcom/qcs615.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs615.dtsi
@@ -332,6 +332,50 @@ mc_virt: interconnect-2 {
 		qcom,bcm-voters = <&apps_bcm_voter>;
 	};
 
+	smp2p-adsp {
+		compatible = "qcom,smp2p";
+		qcom,smem = <443>, <429>;
+		interrupts = <GIC_SPI 172 IRQ_TYPE_EDGE_RISING>;
+		/* On this platform, bit 26 (normally SLPI) is repurposed for ADSP */
+		mboxes = <&apss_shared 26>;
+
+		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 576 IRQ_TYPE_EDGE_RISING>;
+		mboxes = <&apss_shared 6>;
+
+		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>;
+		};
+
+	};
+
 	qup_opp_table: opp-table-qup {
 		compatible = "operating-points-v2";
 		opp-shared;