diff --git a/arch/arm64/boot/dts/qcom/msm8998.dtsi b/arch/arm64/boot/dts/qcom/msm8998.dtsi
index 7e3e34af0664..78227cce16db 100644
--- a/arch/arm64/boot/dts/qcom/msm8998.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8998.dtsi
@@ -273,6 +273,70 @@ smem {
 		hwlocks = <&tcsr_mutex 3>;
 	};
 
+	smp2p-lpass {
+		compatible = "qcom,smp2p";
+		qcom,smem = <443>, <429>;
+
+		interrupts = <GIC_SPI 158 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-mpss {
+		compatible = "qcom,smp2p";
+		qcom,smem = <435>, <428>;
+		interrupts = <GIC_SPI 451 IRQ_TYPE_EDGE_RISING>;
+		mboxes = <&apcs_glb 14>;
+		qcom,local-pid = <0>;
+		qcom,remote-pid = <1>;
+
+		modem_smp2p_out: master-kernel {
+			qcom,entry-name = "master-kernel";
+			#qcom,smem-state-cells = <1>;
+		};
+
+		modem_smp2p_in: slave-kernel {
+			qcom,entry-name = "slave-kernel";
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+	};
+
+	smp2p-slpi {
+		compatible = "qcom,smp2p";
+		qcom,smem = <481>, <430>;
+		interrupts = <GIC_SPI 178 IRQ_TYPE_EDGE_RISING>;
+		mboxes = <&apcs_glb 26>;
+		qcom,local-pid = <0>;
+		qcom,remote-pid = <3>;
+
+		slpi_smp2p_out: master-kernel {
+			qcom,entry-name = "master-kernel";
+			#qcom,smem-state-cells = <1>;
+		};
+
+		slpi_smp2p_in: slave-kernel {
+			qcom,entry-name = "slave-kernel";
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+	};
+
 	thermal-zones {
 		cpu-thermal0 {
 			polling-delay-passive = <250>;