diff --git a/boards/rak/rak11720/rak11720.dts b/boards/rak/rak11720/rak11720.dts
index 643f1da2436..4f4f75d7ff2 100644
--- a/boards/rak/rak11720/rak11720.dts
+++ b/boards/rak/rak11720/rak11720.dts
@@ -90,6 +90,7 @@
 	compatible = "ambiq,spi";
 	pinctrl-0 = <&spi0_default>;
 	pinctrl-names = "default";
+	cs-gpios = <&gpio0_31 1 GPIO_ACTIVE_LOW>;
 	clock-frequency = <DT_FREQ_M(1)>;
 	status = "okay";
 };
diff --git a/boards/rak/rak11720/rak11720_apollo3-pinctrl.dtsi b/boards/rak/rak11720/rak11720_apollo3-pinctrl.dtsi
index 2353d2aaf9e..dbfd0ab8796 100644
--- a/boards/rak/rak11720/rak11720_apollo3-pinctrl.dtsi
+++ b/boards/rak/rak11720/rak11720_apollo3-pinctrl.dtsi
@@ -69,67 +69,31 @@
 		group1 {
 			pinmux = <M0SCK_P5>, <M0MISO_P6>, <M0MOSI_P7>;
 		};
-		group2 {
-			pinmux = <NCE1_P1>;
-			drive-push-pull;
-			ambiq,iom-nce-module = <0>;
-			ambiq,iom-num = <0>;
-		};
 	};
 	spi1_default: spi1_default {
 		group1 {
 			pinmux = <M1SCK_P8>, <M1MISO_P9>, <M1MOSI_P10>;
 		};
-		group2 {
-			pinmux = <NCE11_P11>;
-			drive-push-pull;
-			ambiq,iom-nce-module = <1>;
-			ambiq,iom-num = <1>;
-		};
 	};
 	spi2_default: spi2_default {
 		group1 {
 			pinmux = <M2SCK_P27>, <M2MISO_P25>, <M2MOSI_P28>;
 		};
-		group2 {
-			pinmux = <NCE15_P15>;
-			drive-push-pull;
-			ambiq,iom-nce-module = <3>;
-			ambiq,iom-num = <2>;
-		};
 	};
 	spi3_default: spi3_default {
 		group1 {
 			pinmux = <M3SCK_P42>, <M3MISO_P43>, <M3MOSI_P38>;
 		};
-		group2 {
-			pinmux = <NCE12_P12>;
-			drive-push-pull;
-			ambiq,iom-nce-module = <0>;
-			ambiq,iom-num = <3>;
-		};
 	};
 	spi4_default: spi4_default {
 		group1 {
 			pinmux = <M4SCK_P39>, <M4MISO_P40>, <M4MOSI_P44>;
 		};
-		group2 {
-			pinmux = <NCE13_P13>;
-			drive-push-pull;
-			ambiq,iom-nce-module = <1>;
-			ambiq,iom-num = <4>;
-		};
 	};
 	spi5_default: spi5_default {
 		group1 {
 			pinmux = <M5SCK_P48>, <M5MISO_P49>, <M5MOSI_P47>;
 		};
-		group2 {
-			pinmux = <NCE16_P16>;
-			drive-push-pull;
-			ambiq,iom-nce-module = <0>;
-			ambiq,iom-num = <5>;
-		};
 	};
 
 	mspi0_default: mspi0_default{