diff --git a/target/linux/ramips/dts/PX4885-4M.dts b/target/linux/ramips/dts/PX4885-4M.dts
new file mode 100644
index 0000000000000000000000000000000000000000..39bca1c760fb979ba5d67e26485ea646071dd001
--- /dev/null
+++ b/target/linux/ramips/dts/PX4885-4M.dts
@@ -0,0 +1,42 @@
+/dts-v1/;
+
+/include/ "PX4885.dtsi"
+
+/ {
+	palmbus@10000000 {
+		spi@b00 {
+			status = "okay";
+			m25p80@0 {
+				#address-cells = <1>;
+				#size-cells = <1>;
+				compatible = "mx25l3205d";
+				reg = <0 0>;
+				linux,modalias = "m25p80", "mx25l3205d";
+				spi-max-frequency = <10000000>;
+
+				partition@0 {
+					label = "u-boot";
+					reg = <0x0 0x20000>;
+					read-only;
+				};
+
+				partition@20000 {
+					label = "devdata";
+					reg = <0x20000 0x20000>;
+					read-only;
+				};
+
+				factory: partition@40000 {
+					label = "devconf";
+					reg = <0x40000 0x10000>;
+					read-only;
+				};
+
+				partition@50000 {
+					label = "firmware";
+					reg = <0x50000 0x3b0000>;
+				};
+			};
+		};
+	};
+};
diff --git a/target/linux/ramips/dts/PX4885-8M.dts b/target/linux/ramips/dts/PX4885-8M.dts
new file mode 100644
index 0000000000000000000000000000000000000000..03cb5809ac7a973d19a2e11dfa67810704be4fce
--- /dev/null
+++ b/target/linux/ramips/dts/PX4885-8M.dts
@@ -0,0 +1,42 @@
+/dts-v1/;
+
+/include/ "PX4885.dtsi"
+
+/ {
+	palmbus@10000000 {
+		spi@b00 {
+			status = "okay";
+			m25p80@0 {
+				#address-cells = <1>;
+				#size-cells = <1>;
+				compatible = "mx25l3205d";
+				reg = <0 0>;
+				linux,modalias = "m25p80", "mx25l3205d";
+				spi-max-frequency = <10000000>;
+
+				partition@0 {
+					label = "u-boot";
+					reg = <0x0 0x20000>;
+					read-only;
+				};
+
+				partition@20000 {
+					label = "devdata";
+					reg = <0x20000 0x20000>;
+					read-only;
+				};
+
+				factory: partition@40000 {
+					label = "devconf";
+					reg = <0x40000 0x10000>;
+					read-only;
+				};
+
+				partition@50000 {
+					label = "firmware";
+					reg = <0x50000 0x7b0000>;
+				};
+			};
+		};
+	};
+};
diff --git a/target/linux/ramips/dts/PX4885.dts b/target/linux/ramips/dts/PX4885.dtsi
similarity index 55%
rename from target/linux/ramips/dts/PX4885.dts
rename to target/linux/ramips/dts/PX4885.dtsi
index 2bea444f8294e794dcec891b2cba19b35090055b..1f47a17bbd8a44b65dc5fb244d751eb8bd78fed8 100644
--- a/target/linux/ramips/dts/PX4885.dts
+++ b/target/linux/ramips/dts/PX4885.dtsi
@@ -1,48 +1,9 @@
-/dts-v1/;
-
 /include/ "rt5350.dtsi"
 
 / {
 	compatible = "PX4885", "ralink,rt5350-soc";
 	model = "7Links PX-4885";
 
-	palmbus@10000000 {
-		spi@b00 {
-			status = "okay";
-			m25p80@0 {
-				#address-cells = <1>;
-				#size-cells = <1>;
-				compatible = "mx25l3205d";
-				reg = <0 0>;
-				linux,modalias = "m25p80", "mx25l3205d";
-				spi-max-frequency = <10000000>;
-
-				partition@0 {
-					label = "u-boot";
-					reg = <0x0 0x20000>;
-					read-only;
-				};
-
-				partition@20000 {
-					label = "devdata";
-					reg = <0x20000 0x20000>;
-					read-only;
-				};
-
-				factory: partition@40000 {
-					label = "devconf";
-					reg = <0x40000 0x10000>;
-					read-only;
-				};
-
-				partition@50000 {
-					label = "firmware";
-					reg = <0x50000 0x3b0000>;
-				};
-			};
-		};
-	};
-
 	pinctrl {
 		state_default: pinctrl0 {
 			gpio {
diff --git a/target/linux/ramips/image/Makefile b/target/linux/ramips/image/Makefile
index 93554489a6b638c2c3f6d2aecb548cadb9f67a34..f048cafadca613c2ab147a46512190a64568674b 100644
--- a/target/linux/ramips/image/Makefile
+++ b/target/linux/ramips/image/Makefile
@@ -466,7 +466,7 @@ Image/Build/Profile/PSR-680W=$(call BuildFirmware/Default4M/$(1),$(1),psr-680w,P
 
 Image/Build/Profile/PWH2004=$(call BuildFirmware/Default8M/$(1),$(1),pwh2004,PWH2004)
 
-Image/Build/Profile/PX4885=$(call BuildFirmware/Default4M/$(1),$(1),px4885,PX4885)
+Image/Build/Profile/PX4885=$(call BuildFirmware/DefaultDualSize/$(1),$(1),px4885,PX4885)
 
 Image/Build/Profile/RTG32B1=$(call BuildFirmware/Default4M/$(1),$(1),rt-g32-b1,RT-G32-B1)