nrf54L15 problems with SDK v3.1.0 and v3.1.1

RE: nrf54L15 problems with SDK v3.1.0 and v3.1.1

Priyanka — Wed, 15 Oct 2025 19:30:40 GMT

Sorry for the inconvenience and I totally understand your trouble. I will update this internally to the documentation team and take a look at it.

Thank you for your inputs and suggestions.

-Priyanka

RE: nrf54L15 problems with SDK v3.1.0 and v3.1.1

eboka — Wed, 15 Oct 2025 13:50:19 GMT

Also, the missing file.

It is not that much of a trouble to write in the migration guide a sentence that says that nrf54l15dk_nrf54l10_cpuapp_ns.dts has been removed and that you should update your cmake files it they reference it.

RE: nrf54L15 problems with SDK v3.1.0 and v3.1.1

eboka — Wed, 15 Oct 2025 13:47:23 GMT

I've figured that out.

But, shouldn't stuff like that be in the migration guide? One sentence would spare whole lot of time for many people.

RE: nrf54L15 problems with SDK v3.1.0 and v3.1.1

Priyanka — Tue, 14 Oct 2025 11:54:59 GMT

[quote user=""]build fails with a bunch of same errors in SDK's nrfx_cracen.c (only from different functions):
ncs/v3.1.0/modules/hal/nordic/nrfx/drivers/src/nrfx_cracen.c:350:34: error: 'NRF_CRACENCORE' undeclared (first use in this function); did you mean 'NRF_CRACENCORE_S'?

What happened to nrf54L15 supported in these newer SDKs?[/quote]

On nRF54L devices, the CRACEN CTR_DRBG entropy driver must not be used together with the PSA crypto solution. So when PSA is enabled, the chosen entropy provider should be psa_rng.

The DK board DTS switched to PSA crypto RNG (through TF-M) and removed the old rng node. If your custom board still has the legacy RNG setup, enabling CONFIG_BT=y pulls in entropy and the build tries to compile CRACEN code paths that reference NRF_CRACENCORE (secure-only), hence the error.

[quote user="eboka"]I guess it would not make sense to create new custom boards from scratch each time a new SDK is used?[/quote]

That's right. You don't need to start from scratch with each new SDK. Just carry forward any relevant changes and take a look to incorporate any updates.

https://docs.nordicsemi.com/bundle/ncs-latest/page/zephyr/hardware/porting/board_porting.html

-Priyanka

RE: nrf54L15 problems with SDK v3.1.0 and v3.1.1

eboka — Tue, 14 Oct 2025 09:42:57 GMT

So, it turned out the first problem was related to a project sysbuild.cmake, while the other one was only experienced on a custom board.

That was down to a change in zephyr/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l10_cpuapp_ns.dts:

 chosen {
 zephyr,code-partition = &slot0_ns_partition;
 zephyr,sram = &sram0_ns;
 zephyr,entropy = &psa_rng;
 };

 
 /delete-node/ rng;

 psa_rng: psa-rng {
 status = "okay";
 };

I've been through migration guide, but did not find any mentions of requiring custom board DTS updates. I guess it would not make sense to create new custom boards from scratch each time a new SDK is used?