DevZone Post: Custom nRF54L15 Board Not Recognized by Kconfig (Falls Back to Apollo4X)

[Johnsonian]

DevZone Post: Custom nRF54L15 Board Not Recognized by Kconfig (Falls Back to Apollo4X)

Summary: I am bringing up a custom board based on the Raytac AN54L15Q (nRF54L15). The board is detected and DTS parses correctly, but Kconfig does not recognize the SoC. SOC_NRF54L15_CPUAPP remains undefined, and Kconfig falls back to Apollo4X.

This causes AMBIQ_HAL to be selected and the build to fail.

I have attached a minimal reproduction ZIP and the clean build log.

Symptoms:

• Board is detected

• DTS parses

• Kconfig loads board defconfig

• SOC_NRF54L15_CPUAPP is undefined

• SOC_SERIES_APOLLO4X is selected instead

• AMBIQ_HAL is selected

• • Build aborts in Kconfig

  What I need help with:

  • Confirming the correct SoC identifier for nRF54L15 in NCS 2.6.0

  • Whether additional YAML fields are required

  • Whether custom nRF54L15 boards require special handling in NCS 2.6.0

  Attachments:

  • perioprobe_minimal.zip (board folder + minimal main.c + prj.conf + CMakeLists.txt)

  • build_log.txtPerioprobe.zip

[Turbo J]

Care to explain why you try to use an ancient NCS version? Try 3.1.1 or 2.9.x versions - these actually know a SOC_NRF54L15_CPUAPP config symbol. The 2.6.x version predates it...

[Johnsonian]

Yeah,, got bad advise from both claude and co-pilot.... wasted 3 weeks trying, since no arduino exists for the nrf54l15 family (so they say) , so am respinning the board to an ESR32-s-miini... a real bummer.