juniskane commented on pull request #2943:
URL: https://github.com/apache/incubator-nuttx/pull/2943#issuecomment-789754798


   Yes the static part needs to be corrected/reverted as it silently breaks 
existing configs and contradicts Kconfig help:
   ```
   config STM32F7_RTC_LSECLOCK_START_DRV_CAPABILITY
           int "LSE oscillator drive capability level at LSE start-up"
           default 0
           range 0 3
           ---help---
                   0 = Low drive capability (default)
                   1 = Medium high drive capability
                   2 = Medium low drive capability
                   3 = High drive capability
   
   config STM32F7_RTC_LSECLOCK_RUN_DRV_CAPABILITY
           int "LSE oscillator drive capability level after LSE start-up"
           default 0
           range 0 3
           ---help---
                   0 = Low drive capability (default)
                   1 = Medium high drive capability
                   2 = Medium low drive capability
                   3 = High drive capability
   ```
   We have mass produced F7 devices a lot and are aware of the device not 
starting on manufacturing line due to LSE drive strength issue. Fixed it years 
ago so cannot remember every detail any more.


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