nRF5340 - duplicate unit-address

[koffes]

Describe the bug
During building, the following warnings are printed:

nrf5340dk_nrf5340_cpuapp.dts.pre.tmp:54.42-66.3: Warning (unique_unit_address_if_enabled): /soc/peripheral@50000000/flash-controller@39000: duplicate unit-address (also used in node /soc/peripheral@50000000/kmu@39000)

nrf5340dk_nrf5340_cpuapp.dts.pre.tmp:328.19-334.3: Warning (unique_unit_address_if_enabled): /soc/peripheral@50000000/clock@5000: duplicate unit-address (also used in node /soc/peripheral@50000000/power@5000)

nrf5340dk_nrf5340_cpuapp.dts.pre.tmp:584.31-585.5: Warning (unique_unit_address_if_enabled): /reserved-memory/image@20000000: duplicate unit-address (also used in node /reserved-memory/image_s@20000000)

To Reproduce
Compile any sample such as samples/basic/button using west build -b nrf5340dk_nrf5340_cpuapp

Environment (please complete the following information):

• Linux
• gcc-arm-none-eabi-9-2019-q4-major
• b3ff89b

[github-actions]

This issue has been marked as stale because it has been open (more than) 60 days with no activity. Remove the stale label or add a comment saying that you would like to have the label removed otherwise this issue will automatically be closed in 14 days. Note, that you can always re-open a closed issue at any time.

[koffes]

This is still an issue on master today. @carlescufi : Is this an issue which should be prioritised? Having warnings in vanilla samples is highly undesirable.

[ioannisg]

It is prioritized correctly, even LOW priority bugs count towards release criteria.
The problem is that this is not a trivial fix, considering that the peripheral base addresses are identical in these nRF peripherals (At least CLOCK and POWER, but I guess also NVMC and KMU), so there's something to be done with DTS...

Perhaps @anangl have an idea?

[carlescufi]

Adding @mbolivar-nordic since this probably requires extending our current DT tooling to support this particular case.