examples/lighting-app/nrfconnect/boards/nrf52840dk_nrf52840.overlay

/*
 *    Copyright (c) 2021 Project CHIP Authors
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

/ {
	chosen {
		nordic,pm-ext-flash = &mx25r64;
	};

	/*
	* In some default configurations within the nRF Connect SDK,
	* e.g. on nRF52840, the chosen zephyr,entropy node is &cryptocell.
	* This devicetree overlay ensures that default is overridden wherever it
	* is set, as this application uses the RNG node for entropy exclusively.
	*/

	chosen {
		zephyr,entropy = &rng;
	};

	/*
	* By default, PWM module is only configured for led0 (LED1 on the board).
	* The lighting-app, however, uses LED2 to show the state of the lighting,
	* including its brightness level.
	*/
	aliases {
		pwm-led1 = &pwm_led1;
	};

	pwmleds {
		pwm_led1: pwm_led_1 {
			pwms = <&pwm0 1 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
		};
	};

};

&pwm0 {
	pinctrl-0 = <&pwm0_default_alt>;
	pinctrl-1 = <&pwm0_sleep_alt>;
	pinctrl-names = "default", "sleep";
};

&pinctrl {
	pwm0_default_alt: pwm0_default_alt {
		group1 {
			psels = <NRF_PSEL(PWM_OUT1, 0, 14)>;
			nordic,invert;
		};
	};

	pwm0_sleep_alt: pwm0_sleep_alt {
		group1 {
			psels = <NRF_PSEL(PWM_OUT1, 0, 14)>;
			low-power-enable;
		};
	};

};