Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32H7x5_CM7/RCC/ICSCR#0x0
RCC Internal Clock Source Calibration Register
HSI clock calibration
HSI clock trimming
CSI clock calibration
CSI clock trimming
https://github.com/cmsis-svd/cmsis-svd-data