Power supply Config. 6 and software define

RE: Power supply Config. 6 and software define

Vidar Berg — Mon, 01 Dec 2025 16:14:45 GMT

It was controlled by Kconfig instead of the devicetree in SDK v2.5.3. Link to migration doc: https://docs.nordicsemi.com/bundle/ncs-latest/page/zephyr/releases/migration-guide-4.0.html#regulator

RE: Power supply Config. 6 and software define

ivnn — Sun, 30 Nov 2025 19:50:13 GMT

Thanks
Works great for Zephyr SDK 3.1.1

Could you please advise how to enable LDO in SDK 2.5.3? It's old, and there is no &reg0 and &reg1

RE: Power supply Config. 6 and software define

Vidar Berg — Thu, 06 Nov 2025 12:12:14 GMT

Hi,

If you're building for the nRF52840DK/nrf52840 target you can create a file named nrf52840dk_nrf52840 in your project root directory with the following content which overrides the default regulator configuration for this board to match your HW:

&reg0 {
    status = "disabled";
};

&reg1 {
    regulator-initial-mode = <NRF5X_REG_MODE_LDO>;
};

Then do a pristine/clean build which is needed to allow the build system to detect that the new devictree overlay file has been added. You can also check the zephyr.dts output after completing the build to verify that the changes took effect:

If you don't have the optional 32KHz crystal, you will also need to change the default clock source from LFXO to LFRC by adding CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y to your project configuration (prj.conf) file.

Best regards,

Vidar