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[dmsdio 3/9] Migrate all existing dmdrvi implementations to API 2.0 #8
Description
Goal
Complete the coordinated breaking cutover so the ecosystem has no mixed dmdrvi ABI.
Work
- Locate every dmdrvi DIF implementation and direct consumer.
- Update read/write/stat signatures, return handling, offsets, and documentation.
- Migrate stream, frame, GPIO, memory, DMA, TTY, UART, SPI, Ethernet, clock, FMC, and application drivers.
- Preserve existing semantics where offsets are irrelevant while validating the 64-bit argument.
- Update module dependencies, generated manifests, tests, and examples.
Acceptance criteria
- Every repository builds against dmdrvi 2.0.
- No production implementation registers dmdrvi 1.x signatures.
- Regression tests for existing drivers pass.
- The release set is documented as a coordinated, intentionally breaking migration.
Activity
JaxCalder commentedon Sep 26, 2026
Done. Migrated every dmdrvi DIF implementation and direct consumer to the 2.0 64-bit contract (dmdrvi_offset_t/dmdrvi_size_t/dmdrvi_ssize_t, coordinated version bump across every DIF function).
Implementations migrated (9 repos):
Direct consumer also migrated (found during hardware validation - not a DIF implementer, but dispatches to one):
Bonus fixes found and fixed along the way:
_open()signature drift (missing thedev_numparameter) predating this cutover - fixed as part of the same PRs.Verified end-to-end on real STM32F746G-DISCO hardware: dmclk, dmgpio, dmuart, dmfmc, dmdma, dmeth, and dmtty all load and enable successfully post-migration; full boot log is clean (no API version mismatches), DMA hotplug, UART/tty, and Ethernet all come up correctly.