nrfx_clock.c functions are not available with CONFIG_NRFX_CLOCK

[lanvis]

Issue
nrfx_clock.c functions are not defined with CONFIG_NRFX_CLOCK and therefore cannot configure RTC at run time.

To Reproduce
1.13.99: Add CONFIG_NRFX_CLOCK to a nrf52840 board sample project file then see if function nrfx_clock_lfclk_stop() is available (no link error).
2.0.99 : ?? nrfx_clock.c has been removed from source tree.

Expected behavior
1.13.99 Functions in nrfx_clock.c are not available when CONFIG_NRFX_CLOCK is defined in proj file.
2.0.99 cmake error when defined .. found that nrfx_clock.c is no longer included as a source file and its functions (e.g. nrfx_clcock_lfclk_stop() are no where to be found).

Impact
Cannot configure RTC clock at run time.

Screenshots or console output

Environment (please complete the following information):

• OS: Linux
• Toolchain: Zephyr SDK 0.10.3
• Board nrf52840_pca10056
  -Zephyr 1.13.99 & 2.0.99

Additional context
None ...

[anangl]

@lanvis Now that #18895 is merged the issue should be fixed. Could you please check and confirm it? The problem was that since the NRFX_CLOCK option had no prompt, it was impossible to modify it from the application configuration file - the CONFIG_NRFX_CLOCK=y statement was simply ignored (it was the case also in earlier versions of Zephyr, so if it worked for you earlier, it was by chance - some other Kconfig option must have selected NRFX_CLOCK).

[lanvis]

I don't think so because in 2.0.99, the nrfx_clock.c is not in the source tree. This function includes all of the methods (procs) to change the RTC configuration at run time. I looked at your commits and didn't see it.

[carlescufi]

@lanvis that is because we have moved nrfx to a separate module. It's here: https://github.com/zephyrproject-rtos/hal_nordic/blob/master/nrfx/drivers/src/nrfx_clock.c

Just update to the latest master and then run west update. You will find the files in modules/hal/nordic/nrfx/drivers/src.

[anangl]

Resolved by #18895.