[Backport v4.4-branch] drivers: rtc: stm32: H7RS backup domain access to read RTC + tests#107845
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[Backport v4.4-branch] drivers: rtc: stm32: H7RS backup domain access to read RTC + tests#107845github-actions[bot] wants to merge 4 commits intov4.4-branchfrom
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Enable STM32 backup domain access on H7RS series when accessing some RTC alarm configuration registers that otherwise would be read as 0. Signed-off-by: Etienne Carriere <etienne.carriere@st.com> (cherry picked from commit bf56fb5)
Set rtc DT alias to leverage Zephyr generic RTC support for this board. Signed-off-by: Etienne Carriere <etienne.carriere@st.com> (cherry picked from commit 4c43860)
Set rtc DT alias to leverage Zephyr generic RTC support on this board. Signed-off-by: Etienne Carriere <etienne.carriere@st.com> (cherry picked from commit 2c33e04)
Enable RTC_ALARM and RTC_CALIBRATION in rtc_api tests for stm32h7s* based ST boards: stm32h7s78_dk and nucleo_h7s3l8. Signed-off-by: Etienne Carriere <etienne.carriere@st.com> (cherry picked from commit 0b3b601)
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Backport 0b3b601~4..0b3b601 from #107342.
Original PR description:
Enable STM32 backup domain access on H7RS series when accessing some RTC alarm configuration registers that otherwise would be read as 0.
Default enable RTC alarm and calibration for stm32h7s78_dk and nucleo_h7s3l8 boards when STM32 RTC is enabled.
Fixes: #107355