Connecting the npm1300 to a custom board

[backstreet.devisor]

Good Day.

I'm trying to run the "npm1300_fuel_gauge" example on a custom board (nRF52840), but I'm getting errors that I don't know how to fix. 

The first thing I did was to get the PMIC configuration overlay file (config.overlay) through nPM PowerUP. Then I transferred the code from config.overlay to the custom board device tree file (custom_board_nrf52840.dts). I plan to connect the PMIC via I2C1. 

custom_board_nrf52840.dts -->

&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";

	npm1300_ek_pmic: pmic@6b {
		compatible = "nordic,npm1300";
		reg = <0x6b>;

		npm1300_ek_gpio: gpio-controller {
			compatible = "nordic,npm1300-gpio";
			gpio-controller;
			#gpio-cells = <2>;
			ngpios = <5>;
		};

		npm1300_ek_regulators: regulators {
			compatible = "nordic,npm1300-regulator";

	npm1300_ek_buck1: BUCK1 {
	 regulator-min-microvolt = <1000000>;
	 regulator-max-microvolt = <3300000>;
	 retention-microvolt = <1200000>;
	};

	npm1300_ek_buck2: BUCK2 {
	 regulator-min-microvolt = <1000000>;
	 regulator-max-microvolt = <3300000>;
	 retention-microvolt = <1800000>;
	};

	npm1300_ek_ldo1: LDO1 {
	 regulator-min-microvolt = <1000000>;
	 regulator-max-microvolt = <3300000>;

	 regulator-initial-mode = <NPM1300_LDSW_MODE_LDSW>;
	 // soft-start-microamp = <10000>;
	};

	npm1300_ek_ldo2: LDO2 {
	 regulator-min-microvolt = <1000000>;
	 regulator-max-microvolt = <3300000>;

	 regulator-initial-mode = <NPM1300_LDSW_MODE_LDSW>;
	 // soft-start-microamp = <10000>;
	};
	};

	npm1300_ek_charger: charger {
	 compatible = "nordic,npm1300-charger";
	 term-microvolt = <4200000>;
	 term-warm-microvolt = <3600000>;
	 // term-current-percent = <10>;
	 current-microamp = <100000>;
	 // trickle-microvolt = <2900000>;
	 dischg-limit-microamp = <1000000>;
	 vbus-limit-microamp = <500000>;
	 thermistor-ohms = <10000>;
	 thermistor-beta = <3380>;
	 charging-enable;
	};

	npm1300_ek_leds: leds {
	 compatible = "nordic,npm1300-led";
	 nordic,led0-mode = "error";
	  nordic,led1-mode = "charging";
	  nordic,led2-mode = "host";
	};
	};
};

custom_board_nrf52840-pinctrl.dtsi -->

i2c1_default: i2c1_default {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 15)>,
				<NRF_PSEL(TWIM_SCL, 0, 17)>;
			bias-pull-up;
		};
	};

	i2c1_sleep: i2c1_sleep {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 15)>,
				<NRF_PSEL(TWIM_SCL, 0, 17)>;
			low-power-enable;
		};
	};

The following errors occur in the .dts file (see screenshot).

I know that these values should be taken from the "fuel_gauge.h" file, but that doesn't happen for some reason.

I see an error in the prj.conf file too (see screenshot). 

When building the project, I see the following information -->

I have not changed the CMakeLists.txt files. 

# Copyright (c) 2023 Nordic Semiconductor ASA
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause

cmake_minimum_required(VERSION 3.20.0)

set(SHIELD npm1300_ek)

find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})

project(my_npm1300_fuel_gauge)

add_subdirectory(src)

Can you please tell me where I am making a mistake when transferring this example to my custom board?

Thank you.