diff --git a/boards/nrf52840dongle_no_usb.overlay b/boards/nrf52840dongle_no_usb.overlay
deleted file mode 100644
index 9e135fd..0000000
--- a/boards/nrf52840dongle_no_usb.overlay
+++ /dev/null
@@ -1,10 +0,0 @@
-/* Override UART0 pins */
-&uart0 {
-    status = "okay";
-    current-speed = <115200>;
-    /* Explicitly disable hardware flow control */
-    //hw-flow-control;
-    /* Explicitly set the pins */
-    //tx-pin = <13>;  /* P0.13 */
-    //rx-pin = <15>;  /* P0.15 */
-};
\ No newline at end of file
diff --git a/boards/nrf52840dongle_no_usb/nrf52840dongle_no_usb_nrf52840-pinctrl.dtsi b/boards/nrf52840dongle_no_usb/nrf52840dongle_no_usb_nrf52840-pinctrl.dtsi
index 50eea8d..a3f7d38 100644
--- a/boards/nrf52840dongle_no_usb/nrf52840dongle_no_usb_nrf52840-pinctrl.dtsi
+++ b/boards/nrf52840dongle_no_usb/nrf52840dongle_no_usb_nrf52840-pinctrl.dtsi
@@ -26,36 +26,6 @@
 		};
 	};
 
-	i2c0_default: i2c0_default {
-		group1 {
-			psels = <NRF_PSEL(TWIM_SDA, 0, 26)>,
-				<NRF_PSEL(TWIM_SCL, 0, 27)>;
-		};
-	};
-
-	i2c0_sleep: i2c0_sleep {
-		group1 {
-			psels = <NRF_PSEL(TWIM_SDA, 0, 26)>,
-				<NRF_PSEL(TWIM_SCL, 0, 27)>;
-			low-power-enable;
-		};
-	};
-
-	i2c1_default: i2c1_default {
-		group1 {
-			psels = <NRF_PSEL(TWIM_SDA, 0, 30)>,
-				<NRF_PSEL(TWIM_SCL, 0, 31)>;
-		};
-	};
-
-	i2c1_sleep: i2c1_sleep {
-		group1 {
-			psels = <NRF_PSEL(TWIM_SDA, 0, 30)>,
-				<NRF_PSEL(TWIM_SCL, 0, 31)>;
-			low-power-enable;
-		};
-	};
-
 	pwm0_default: pwm0_default {
 		group1 {
 			psels = <NRF_PSEL(PWM_OUT0, 0, 8)>,
diff --git a/boards/nrf52840dongle_no_usb/nrf52840dongle_no_usb_nrf52840.dts b/boards/nrf52840dongle_no_usb/nrf52840dongle_no_usb_nrf52840.dts
index 0e6bef5..d66b87f 100644
--- a/boards/nrf52840dongle_no_usb/nrf52840dongle_no_usb_nrf52840.dts
+++ b/boards/nrf52840dongle_no_usb/nrf52840dongle_no_usb_nrf52840.dts
@@ -124,56 +124,13 @@
 &uart0 {
 	compatible = "nordic,nrf-uarte";
 	status = "okay";
-	current-speed = <115200>;
+	current-speed = <1000000>;
 	pinctrl-0 = <&uart0_default>;
 	pinctrl-1 = <&uart0_sleep>;
 	pinctrl-names = "default", "sleep";
+	hw-flow-control;
 };
 
-&i2c0 {
-	compatible = "nordic,nrf-twi";
-	status = "okay";
-	pinctrl-0 = <&i2c0_default>;
-	pinctrl-1 = <&i2c0_sleep>;
-	pinctrl-names = "default", "sleep";
-};
-
-&i2c1 {
-	compatible = "nordic,nrf-twi";
-	/* Cannot be used together with spi1. */
-	/* status = "okay"; */
-	pinctrl-0 = <&i2c1_default>;
-	pinctrl-1 = <&i2c1_sleep>;
-	pinctrl-names = "default", "sleep";
-};
-
-&pwm0 {
-	status = "okay";
-	pinctrl-0 = <&pwm0_default>;
-	pinctrl-1 = <&pwm0_sleep>;
-	pinctrl-names = "default", "sleep";
-};
-
-/*
- * By default, not adding all available SPI instances (spi2, spi3) due to
- * limited GPIOs available on dongle board.
- */
-&spi0 {
-	compatible = "nordic,nrf-spi";
-	/* Cannot be used together with i2c0. */
-	/* status = "okay"; */
-	pinctrl-0 = <&spi0_default>;
-	pinctrl-1 = <&spi0_sleep>;
-	pinctrl-names = "default", "sleep";
-};
-
-&spi1 {
-	compatible = "nordic,nrf-spi";
-	status = "okay";
-	pinctrl-0 = <&spi1_default>;
-	pinctrl-1 = <&spi1_sleep>;
-	pinctrl-names = "default", "sleep";
-};
 
 &ieee802154 {
 	status = "okay";
@@ -186,14 +143,3 @@
  */
 #include "fstab-debugger.dtsi"
 
-
-
-&uart0_default {
-	group1 {
-		psels = <NRF_PSEL(UART_TX, 0, 13)>, <NRF_PSEL(UART_RTS, 0, 17)>;
-	};
-
-	group2 {
-		psels = <NRF_PSEL(UART_RX, 0, 15)>, <NRF_PSEL(UART_CTS, 0, 20)>;
-	};
-};