diff --git a/arch/arm64/boot/dts/ti/k3-am623-pfc-750-8xxx-common.dtsi b/arch/arm64/boot/dts/ti/k3-am623-pfc-750-8xxx-common.dtsi
index 663e84e979c2..68fc4e6dae08 100644
--- a/arch/arm64/boot/dts/ti/k3-am623-pfc-750-8xxx-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am623-pfc-750-8xxx-common.dtsi
@@ -123,7 +123,7 @@
 
 		mcu_m4fss_dma_memory_region: m4f-dma-memory@9cb00000 {
 			compatible = "shared-dma-pool";
-			reg = <0x00 0x9cb00000 0x00 0x100000>;
+			reg = <0x00 0x9cb00000 0x00 0xff000>;
 			no-map;
 		};