drivers: counter: stm32: Add support for HSE as RTC clock source

[mrfuchs]

Add Kconfig options COUNTER_RTC_STM32_CLOCK_HSE and COUNTER_RTC_STM32_HSE_DIV
to allow configuring HSE as the RTC clock source.

Signed-off-by: Markus Fuchs [email protected]

[erwango]

Thanks for this change but this way of configuring clocks on STM32 drivers is obsolete today.
Please use device tree based configuration, see #45053 and an example on how to add driver support: #45508

[mrfuchs]

Thanks for this change but this way of configuring clocks on STM32 drivers is obsolete today. Please use device tree based configuration, see #45053 and an example on how to add driver support: #45508

I see. As we're still running on Zephyr 2.7, I cannot provide a proper patch for that at the moment then.

[erwango]

Thanks for this change but this way of configuring clocks on STM32 drivers is obsolete today. Please use device tree based configuration, see #45053 and an example on how to add driver support: #45508

I see. As we're still running on Zephyr 2.7, I cannot provide a proper patch for that at the moment then.

Ok, no problem, this is something that we'll address when possible.

[github-actions]

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[FRASTM]

Thanks for this change but this way of configuring clocks on STM32 drivers is obsolete today. Please use device tree based configuration, see #45053 and an example on how to add driver support: #45508

I see. As we're still running on Zephyr 2.7, I cannot provide a proper patch for that at the moment then.

Ok, no problem, this is something that we'll address when possible.

There is a slight difference, the RTC clock selection is a 2-bit value of the BDCR RCC register (not CCIPR).

[FRASTM]

0 is not always the default, some stm32 devices like stm32F4 have a prescaler from 2 to 31 on the HSE clock, some others like the stm32wb or stm32L4/L5 have a fixed divider by 32 on the HSE clock

[github-actions]

This pull request 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 pull request will automatically be closed in 14 days. Note, that you can always re-open a closed pull request at any time.

[erwango]

Superseded by #50104. Closing