diff --git a/arch/arm64/boot/dts/qcom/apq8016-sbc.dts b/arch/arm64/boot/dts/qcom/apq8016-sbc.dts
index 0fcf341f735b..3c51f891029e 100644
--- a/arch/arm64/boot/dts/qcom/apq8016-sbc.dts
+++ b/arch/arm64/boot/dts/qcom/apq8016-sbc.dts
@@ -263,6 +263,7 @@ &mpss {
 
 &mpss_mem {
 	status = "okay";
+	reg = <0x0 0x86800000 0x0 0x2b00000>;
 };
 
 &pm8916_codec {
diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
index 563709d95c0d..b141331f51fd 100644
--- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
@@ -84,7 +84,7 @@ mpss_mem: mpss@86800000 {
 			 * alignment = <0x0 0x400000>;
 			 * alloc-ranges = <0x0 0x86800000 0x0 0x8000000>;
 			 */
-			reg = <0x0 0x86800000 0x0 0x2b00000>;
+			reg = <0x0 0x86800000 0x0 0>; /* size is device-specific */
 			no-map;
 			status = "disabled";
 		};
diff --git a/arch/arm64/boot/dts/qcom/msm8939.dtsi b/arch/arm64/boot/dts/qcom/msm8939.dtsi
index c50f6d828fed..ba177725f3d7 100644
--- a/arch/arm64/boot/dts/qcom/msm8939.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8939.dtsi
@@ -356,7 +356,7 @@ mpss_mem: mpss@86800000 {
 			 * alignment = <0x0 0x400000>;
 			 * alloc-ranges = <0x0 0x86800000 0x0 0x8000000>;
 			 */
-			reg = <0x0 0x86800000 0x0 0x5500000>;
+			reg = <0x0 0x86800000 0x0 0>; /* size is device-specific */
 			no-map;
 			status = "disabled";
 		};