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U5: Enable MSI auto calibration and compute frequencies #4313

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snakehand
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This adresses #4312

@Dirbaio
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Dirbaio commented Jun 22, 2025

Thanks for the PR!

From looking at the RM, it seems to me MSI PLL is only usable when LSE is exactly 32768hz, and therefore the MSI freq will always be exactly what's specified by MSIRANGE, so we can always use msirange_to_hertz and calculate_calibrated_msi_frequency is not actually needed. Am I missing something?

screenshot-2025-06-22_23-30-42

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