diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
index 3758fa9992bde3..94b472aa99101b 100644
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -34,6 +34,7 @@ dtbo-$(RPI_DT_OVERLAYS) += hy28a.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += hy28b.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += i2c-rtc.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += i2c-gpio.dtbo
+dtbo-$(RPI_DT_OVERLAYS) += i2c-mux-pca9545a.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += i2c-mux-pca9548a.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += i2c-pwm-pca9685a.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += i2c0-bcm2708.dtbo
diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
index 78b2616399987d..a6bddcabb8d915 100644
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -420,6 +420,12 @@ Params: i2c_gpio_sda            GPIO used for I2C data (default "23")
         i2c_gpio_delay_us       Clock delay in microseconds
                                 (default "2" = ~100kHz)
 
+								
+Name:   i2c-mux-pca9545a
+Info:   Adds support for an NXP PCA9545A I2C multiplexer on i2c_arm
+Load:   dtoverlay=i2c-mux-pca9545a,<param>=<val>
+Params: addr                    I2C address of PCA9545A (default 0x73)
+
 
 Name:   i2c-mux-pca9548a
 Info:   Adds support for an NXP PCA9548A I2C multiplexer on i2c_arm
diff --git a/arch/arm/boot/dts/overlays/i2c-mux-pca9545a-overlay.dts b/arch/arm/boot/dts/overlays/i2c-mux-pca9545a-overlay.dts
new file mode 100644
index 00000000000000..6cba2f3c820db9
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/i2c-mux-pca9545a-overlay.dts
@@ -0,0 +1,47 @@
+// Definitions for NXP PCA9545A I2C mux on ARM I2C bus.
+/dts-v1/;
+/plugin/;
+
+/{
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&i2c_arm>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			i2cmux: mux@73 {
+				compatible = "nxp,pca9545";
+				reg = <0x73>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				i2c@0 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <0>;
+				};
+				i2c@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+				};
+				i2c@2 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <2>;
+				};
+				i2c@3 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <3>;
+				};
+			};
+		};
+	};
+	__overrides__ {
+		addr = <&i2cmux>,"reg:0";
+	};
+};