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GPIO: Explicitly casts constants to uint32_t #2106

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Description

Explicitly casts constants (3U and pin * 2U) to uint32_t to prevent type promotion or mismatches.

Noticed this MISRA violation when we were working on sunnypilot's panda using upstream's CI: https://github.com/sunnypilot/panda/actions/runs/12314225225/job/34369895304

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@sunnyhaibin sunnyhaibin changed the title GPIO: - Explicitly casts constants to uint32_t GPIO: Explicitly casts constants to uint32_t Dec 13, 2024
@adeebshihadeh
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Why doesn't this fail on ours?

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