I3C: add auto bus resolution, init/IRQ fixes, and memory cleanup#3000

Draft

Aymane-ST wants to merge 14 commits into

stm32duino:mainfrom

Aymane-ST:prod/I3C

Commits on Jul 1, 2026

feat(i3c): replace fixed bus instances with an auto-resolved I3C bus
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fix(i3c): compute bus timing before HAL init and unify timing handling
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fix(i3c): guard family-specific end-of-frame configuration
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fix(i3c): route IRQ and HAL notify callbacks to the active bus instance
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fix(i3c): enable I3C IRQs on demand and harden init and cleanup flows
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refactor(i3c): right-size temporary transfer buffers to required frame sizes
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fix(i3c): mark dynamically assigned addresses as used during DAA
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refactor(i3c): delegate kernel clock source selection to variant clock config
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Revert "fix(I3C): Increase minimum stack size for (H503RB - H563ZI)"
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chore(examples): switch examples to generic auto-resolved I3C bus
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fix(i3c): fix enableIbi return value handling
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ci(build): switch BareMinimum example to generic auto-resolved I3C bus
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feat(i3c): add end() to deinitialize the active bus
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chore(i3c): refresh Arduino keywords to match the current public API
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