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

Draft

Aymane-ST wants to merge 11 commits into

stm32duino:mainfrom

Aymane-ST:prod/I3C

Commits on Jun 26, 2026

feat(i3c): support automatic instance selection from SDA/SCL pins
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fix(i3c): initialize controller bus timing before HAL init
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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 interrupts on demand
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fix(i3c): harden controller and target init cleanup
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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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