cpu/stm32: model MCO clock configuration in kconfig #15706
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Contribution description
This PR adds a Kconfig configuration for the MCO (MCU Clock Output) of some STM32 families (F0/F1/F3/G0/G4/L0/L1/L4/WB). F2/F4/F7 families are not addressed by this PR because there clock configuration is not yet modeled in Kconfig (see #15632) and they provide 2 MCO outputs.
To support the fact that f1 and some f0 and f3 don't provide an MCO prescaler, the
CLOCK_HAS_NO_MCO_PREconfig is introduced and selected in the affected family (f1) and lines (f0/f3).Testing procedure
Run
make BOARD=<board> -C examples/hello-world menuconfigand verify that theEnable MCU Clock Outputoption is displayed in the STM32 clock configuration submenu. Once selected, the MCO prescaler and source can be selected. By default, the presaler is 1 and the source is PLLCLK.Issues/PRs references
Tick an item in #14975