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gpio: add GPIO_GET_PIN_LIST
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Authored by vexeduxr on Aug 26 2025, 7:24 PM.
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Details

Summary

While most GPIO controllers provide pins from 0 .. N in a sequential
manner, not all controllers start with pin 0, and not all controllers
order their pins sequentially. Allow callers to get a pin list from the
controller. The default behaviour is to fill pin_list with pins 0 to
GPIO_PIN_MAX().

Suggested by: mmel

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rG FreeBSD src repository
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