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uart: export rclk via sysctl
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Authored by imp on Oct 11 2024, 9:53 PM.
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Details

Summary

To help debugging, export the rclk a uart is using as
dev.uart.X.rclk. It can be opaque when it is wrong since any error
messages printed to the system console using the wrong rclk aren't
informative.

Sponsored by: Netflix

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rG FreeBSD src repository
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