prj.conf errors when trying to configure a custom nrf5340 board for High Voltage DC-DC mode

[lcj]

I am using 2.9.1 toolchain and sdk with a custom nrf5340 board and trying to use High Voltage (HV) with DC-DC mode. I don't know much about it as I have been using a nrf5340 DK for prototyping but read the documentation and am trying to figure it out.

I read this post on How to turn on nrf5340 DCDC but when I add these settings to the prj.conf:

CONFIG_BOARD_ENABLE_DCDC_APP=y
CONFIG_BOARD_ENABLE_DCDC_NET=y
CONFIG_BOARD_ENABLE_DCDC_HV=y

but am getting these errors:

/Users/********/Projects/GitHub/********/pcb_test/prj.conf:32: warning: attempt to assign the value 'y' to the undefined symbol BOARD_ENABLE_DCDC_APP
/Users/********/Projects/GitHub/********/pcb_test/prj.conf:33: warning: attempt to assign the value 'y' to the undefined symbol BOARD_ENABLE_DCDC_NET
/Users/********/Projects/GitHub/********/pcb_test/prj.conf:34: warning: attempt to assign the value 'y' to the undefined symbol BOARD_ENABLE_DCDC_HV

[Priyanka]

Hi Leo,

You get the prj.conf errors because the recommended way to configure regulators is now via devicetree, and not via Kconfig.

https://docs.nordicsemi.com/bundle/ncs-latest/page/zephyr/releases/migration-guide-4.0.html#regulator 

Regards,

Priyanka

[lcj]

Thank you. I can build now. I just need to figure out how to test.

[lcj]

That looks like your reference is the migration guide to Zephyr 4.0. The build information says:

-- Zephyr version: 3.7.99 (/opt/nordic/ncs/v2.9.1/zephyr)

[Priyanka]

But you are able to build by using dts instead of config?

-Priyanka

[lcj]

Yes