diff --git a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
index a1f3c244b83e..b08e94430bea 100644
--- a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
@@ -49,6 +49,13 @@
 			reg = <0x00000000 0x54000000 0x0 0x03000000>;
 		};
 
+		/* For Audio DSP */
+		adsp_reserved: linux,adsp {
+			compatible = "shared-dma-pool";
+			reusable;
+			reg = <0x00000000 0x57000000 0x0 0x01000000>;
+		};
+
 		/* global autoconfigured region for contiguous allocations */
 		linux,cma {
 			compatible = "shared-dma-pool";
@@ -388,6 +395,11 @@
 	status = "okay";
 };
 
+&adsp {
+	status = "okay";
+	memory-region = <&adsp_reserved>;
+};
+
 &scif2 {
 	pinctrl-0 = <&scif2_pins>;
 	pinctrl-names = "default";