diff --git a/boards/arm/apollo4p_blue_kxr_evb/apollo4p_blue_kxr_evb.dts b/boards/arm/apollo4p_blue_kxr_evb/apollo4p_blue_kxr_evb.dts
index cb4014a4f08..f9aa3c11c31 100644
--- a/boards/arm/apollo4p_blue_kxr_evb/apollo4p_blue_kxr_evb.dts
+++ b/boards/arm/apollo4p_blue_kxr_evb/apollo4p_blue_kxr_evb.dts
@@ -87,20 +87,9 @@
 };
 
 &iom4 {
-	compatible = "ambiq,spi";
 	pinctrl-0 = <&spi4_default>;
 	pinctrl-names = "default";
-	cs-gpios = <&gpio32_63 22 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
-	clock-frequency = <DT_FREQ_M(24)>;
 	status = "okay";
-
-	bt-hci@0 {
-		compatible = "ambiq,bt-hci-spi";
-		reg = <0>;
-		irq-gpios = <&gpio32_63 21 GPIO_ACTIVE_HIGH>;
-		reset-gpios = <&gpio32_63 23 GPIO_ACTIVE_LOW>;
-		clkreq-gpios = <&gpio32_63 20 GPIO_ACTIVE_HIGH>;
-	};
 };
 
 &mspi0 {
diff --git a/dts/arm/ambiq/ambiq_apollo4p_blue.dtsi b/dts/arm/ambiq/ambiq_apollo4p_blue.dtsi
index 5df5c7d4b47..dfc2f59de3d 100644
--- a/dts/arm/ambiq/ambiq_apollo4p_blue.dtsi
+++ b/dts/arm/ambiq/ambiq_apollo4p_blue.dtsi
@@ -160,13 +160,25 @@
 			ambiq,pwrcfg = <&pwrcfg 0x4 0x10>;
 		};
 
-		iom4: iom@40054000 {
+		iom4: spi@40054000 {
+			/* IOM4 works as SPI and is wired internally for BLE HCI. */
+			compatible = "ambiq,spi";
 			reg = <0x40054000 0x1000>;
 			#address-cells = <1>;
 			#size-cells = <0>;
 			interrupts = <10 0>;
+			cs-gpios = <&gpio32_63 22 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			clock-frequency = <DT_FREQ_M(24)>;
 			status = "disabled";
 			ambiq,pwrcfg = <&pwrcfg 0x4 0x20>;
+
+			bt-hci@0 {
+				compatible = "ambiq,bt-hci-spi";
+				reg = <0>;
+				irq-gpios = <&gpio32_63 21 GPIO_ACTIVE_HIGH>;
+				reset-gpios = <&gpio32_63 23 GPIO_ACTIVE_LOW>;
+				clkreq-gpios = <&gpio32_63 20 GPIO_ACTIVE_HIGH>;
+			};
 		};
 
 		iom5: iom@40055000 {