drivers: gpio: Add open drain output support for STM32

[rosterloh]

Support configuring output as open drain instead of push pull
for STM32 devices with the GPIO_DS_DISCONNECT_HIGH flag

Signed-off-by: Richard Osterloh [email protected]

[zephyrbot]

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Kconfig issues

Found references to undefined Kconfig symbols. If any of these are false
positives, then add them to UNDEF_KCONFIG_WHITELIST in check_compliance.py in the ci-tools repo.

If the reference is for a comment like /* CONFIG_FOO_* */ (or
/* CONFIG_FOO_*_... */), then please use exactly that form (with the '*'). The
CI check knows not to flag it.

More generally, a reference followed by $, @, {, *, or ## will never be
flagged.

CONFIG_HPET_TIMER_IRQ                      boards/x86/qemu_x86/qemu_x86_long_defconfig:8

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[erwango]

@rosterloh, thanks for proposal.
Please note imminent driver rework due to new GPIO API introduction, merged yesterday actually (#16648). So please have a look and check if it fits your need.

[rosterloh]

Is there a PR already for migrating the gpio_stm32 driver to the new API?

[erwango]

Is there a PR already for migrating the gpio_stm32 driver to the new API?

Only an issue for now, #19270.
Things should move next week

[rosterloh]

I'm happy with the way this is implemented in #19607 so I'm closing this PR