diff --git a/boards/arm/nrf9160_innblue21/CMakeLists.txt b/boards/arm/nrf9160_innblue21/CMakeLists.txt
deleted file mode 100644
index 8ba95b81ad8..00000000000
--- a/boards/arm/nrf9160_innblue21/CMakeLists.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-# Copyright (c) 2020 InnBlue
-# SPDX-License-Identifier: Apache-2.0
-zephyr_library()
-zephyr_library_sources(innblue21_board_init.c)
diff --git a/boards/arm/nrf9160_innblue21/Kconfig.defconfig b/boards/arm/nrf9160_innblue21/Kconfig.defconfig
index 230422cbb2e..08d0409c9af 100644
--- a/boards/arm/nrf9160_innblue21/Kconfig.defconfig
+++ b/boards/arm/nrf9160_innblue21/Kconfig.defconfig
@@ -42,4 +42,7 @@ endif # BOARD_NRF9160_INNBLUE21_NS
 config BT_HCI_VS
 	default y if BT
 
+config REGULATOR
+	default y if SENSOR
+
 endif # BOARD_NRF9160_INNBLUE21 || BOARD_NRF9160_INNBLUE21_NS
diff --git a/boards/arm/nrf9160_innblue21/innblue21_board_init.c b/boards/arm/nrf9160_innblue21/innblue21_board_init.c
deleted file mode 100644
index 8eb779bfebf..00000000000
--- a/boards/arm/nrf9160_innblue21/innblue21_board_init.c
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright (c) 2020 InnBlue
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-#include <zephyr/init.h>
-#include <zephyr/drivers/gpio.h>
-
-#define VDD_3V3_PWR_CTRL_GPIO_PIN  12   /* ENABLE_3V3_SENSOR --> i2c sensors  */
-#define VDD_5V0_PWR_CTRL_GPIO_PIN  21   /* ENABLE_5V0_BOOST  --> speed sensor */
-
-/* Configures the pin as output and sets them high. */
-static void config_pin(const struct device *gpio, int pin)
-{
-	int err;
-
-	/* Configure this pin as output. */
-	err = gpio_pin_configure(gpio, pin, GPIO_OUTPUT_ACTIVE);
-	if (err == 0) {
-		/* Write "1" to this pin. */
-		err = gpio_pin_set(gpio, pin, 1);
-	}
-
-	/* Wait for the rail to come up and stabilize. */
-	k_sleep(K_MSEC(10));
-}
-
-static int pwr_ctrl_init(const struct device *dev)
-{
-	const struct device *gpio;
-
-	/* Get handle of the GPIO device. */
-	gpio = DEVICE_DT_GET(DT_NODELABEL(gpio0));
-
-	if (!device_is_ready(gpio)) {
-		return -ENODEV;
-	}
-
-	/* Configure the gpio pin. */
-	config_pin(gpio, VDD_3V3_PWR_CTRL_GPIO_PIN);
-	config_pin(gpio, VDD_5V0_PWR_CTRL_GPIO_PIN);
-
-	return 0;
-}
-
-SYS_INIT(pwr_ctrl_init, POST_KERNEL, 70);
diff --git a/boards/arm/nrf9160_innblue21/nrf9160_innblue21_common.dts b/boards/arm/nrf9160_innblue21/nrf9160_innblue21_common.dts
index d8749f58c00..dea56dda187 100644
--- a/boards/arm/nrf9160_innblue21/nrf9160_innblue21_common.dts
+++ b/boards/arm/nrf9160_innblue21/nrf9160_innblue21_common.dts
@@ -45,6 +45,24 @@
 		};
 	};
 
+	en_3v3_sensor: enable-3v3-sensor {
+		compatible = "regulator-fixed-sync", "regulator-fixed";
+		label = "ENABLE_3V3_SENSOR";
+		regulator-name = "en_3v3_sensor";
+		enable-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
+		startup-delay-us = <10000>;
+		regulator-boot-on;
+	};
+
+	en_5v0_boost: enable-5v0-boost {
+		compatible = "regulator-fixed-sync", "regulator-fixed";
+		label = "ENABLE_5V0_BOOST";
+		regulator-name = "en_5v0_boost";
+		enable-gpios = <&gpio0 21 GPIO_ACTIVE_HIGH>;
+		startup-delay-us = <10000>;
+		regulator-boot-on;
+	};
+
 	/* These aliases are provided for compatibility with samples */
 	aliases {
 		led0 = &red_led;