cpu/nrf{53,9160}: add periph_rtt support

[dylad]

Contribution description

This PR enables support for periph_rtt on both nRF9160 and nRF53.
This PR is based on #19803

I was only able to test on nrf5340dk-app as I don't have access to any nrf9160-based board.

Here is test/periph/rtt output for reference on nrf5340dk-app:

Testing procedure

flash tests/periph/rtt on nrf9160dk or nrf5340dk-app and check the results.

s
2023-07-06 16:11:16,471 # START
2023-07-06 16:11:16,479 # main(): This is RIOT! (Version: 2023.07-devel-765-g02c65-cpu/nrf53/add_rtt_support)
2023-07-06 16:11:16,480 # 
2023-07-06 16:11:16,482 # RIOT RTT low-level driver test
2023-07-06 16:11:16,483 # RTT configuration:
2023-07-06 16:11:16,485 # RTT_MAX_VALUE: 0x00ffffff
2023-07-06 16:11:16,487 # RTT_FREQUENCY: 1024
2023-07-06 16:11:16,487 # 
2023-07-06 16:11:16,494 # Testing the tick conversion (with rounding if RTT_FREQUENCY is not power of 2)
2023-07-06 16:11:16,498 # Trying to convert 1 to seconds and back
2023-07-06 16:11:16,501 # Trying to convert 256 to seconds and back
2023-07-06 16:11:16,505 # Trying to convert 65536 to seconds and back
2023-07-06 16:11:16,509 # Trying to convert 16777216 to seconds and back
2023-07-06 16:11:16,514 # Trying to convert 2147483648 to seconds and back
2023-07-06 16:11:16,514 # All ok
2023-07-06 16:11:16,514 # 
2023-07-06 16:11:16,517 # Initializing the RTT driver
2023-07-06 16:11:16,835 # This test will now display 'Hello' every 5 seconds
2023-07-06 16:11:16,835 # 
2023-07-06 16:11:16,836 # RTT now: 4
2023-07-06 16:11:16,840 # Setting initial alarm to now + 5 s (5124)
2023-07-06 16:11:16,841 # rtt_get_alarm() PASSED
2023-07-06 16:11:16,846 # Done setting up the RTT, wait for many Hellos
2023-07-06 16:11:16,852 # { "threads": [{ "name": "main", "stack_size": 1536, "stack_used": 404 }]}
2023-07-06 16:11:21,833 # Hello
2023-07-06 16:11:26,831 # Hello
2023-07-06 16:11:31,830 # Hello
2023-07-06 16:11:36,828 # Hello
2023-07-06 16:11:41,826 # Hello
2023-07-06 16:11:46,825 # Hello
2023-07-06 16:11:51,823 # Hello
2023-07-06 16:11:56,821 # Hello
2023-07-06 16:12:01,821 # Hello
2023-07-06 16:12:06,819 # Hello
2023-07-06 16:12:11,817 # Hello
2023-07-06 16:12:16,815 # Hello
2023-07-06 16:12:21,813 # Hello
2023-07-06 16:12:26,811 # Hello

Issues/PRs references

based on #19803

[dylad]

Rebased. No more waiting for any PRs.

Output of tests/periph/rtt for nrf5340dk-app:

2023-07-07 09:19:13,936 # Help: Press s to start test, r to print it is ready
s
2023-07-07 09:19:16,324 # START
2023-07-07 09:19:16,331 # main(): This is RIOT! (Version: 2023.07-devel-789-g54631-cpu/nrf53/add_rtt_support)
2023-07-07 09:19:16,331 # 
2023-07-07 09:19:16,334 # RIOT RTT low-level driver test
2023-07-07 09:19:16,335 # RTT configuration:
2023-07-07 09:19:16,338 # RTT_MAX_VALUE: 0x00ffffff
2023-07-07 09:19:16,339 # RTT_FREQUENCY: 1024
2023-07-07 09:19:16,339 # 
2023-07-07 09:19:16,346 # Testing the tick conversion (with rounding if RTT_FREQUENCY is not power of 2)
2023-07-07 09:19:16,350 # Trying to convert 1 to seconds and back
2023-07-07 09:19:16,353 # Trying to convert 256 to seconds and back
2023-07-07 09:19:16,357 # Trying to convert 65536 to seconds and back
2023-07-07 09:19:16,361 # Trying to convert 16777216 to seconds and back
2023-07-07 09:19:16,366 # Trying to convert 2147483648 to seconds and back
2023-07-07 09:19:16,366 # All ok
2023-07-07 09:19:16,366 # 
2023-07-07 09:19:16,369 # Initializing the RTT driver
2023-07-07 09:19:16,690 # This test will now display 'Hello' every 5 seconds
2023-07-07 09:19:16,690 # 
2023-07-07 09:19:16,691 # RTT now: 4
2023-07-07 09:19:16,694 # Setting initial alarm to now + 5 s (5124)
2023-07-07 09:19:16,696 # rtt_get_alarm() PASSED
2023-07-07 09:19:16,700 # Done setting up the RTT, wait for many Hellos
2023-07-07 09:19:16,707 # { "threads": [{ "name": "main", "stack_size": 1536, "stack_used": 404 }]}
2023-07-07 09:19:21,688 # Hello
2023-07-07 09:19:26,686 # Hello
2023-07-07 09:19:31,685 # Hello
2023-07-07 09:19:36,683 # Hello

[riot-ci]

Murdock results

✔️ PASSED

263e993 cpu/nrf53: setup XL1/XL2 pins for using external 32K osc if needed

Success	Failures	Total	Runtime
6935	0	6936	09m:55s

Artifacts

• Documentation preview

[benpicco]

Please squash

[benpicco]

bors merge

[bors]

Already running a review

[bors]

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• Murdock
• static-tests
• tools-build-success

[dylad]

Thanks !