Adding Support for Power Over Ethernet (PoE or IEEE Clause 33) to Linux Network Stack
summary
Adds kernel and userspace plumbing to expose PoE (IEEE Clause 33) features via netlink uapi, implements PSE core changes and registers per-port regulator API wrappers so power can be controlled like a regulator. Ships drivers for Microchip PD692x0 and TI TPS23881, handles class detection pulses and 15 W–71 W ranges, demo shows ports powering a camera, patches are partly merged with more work on port abstraction, power limits, priorities and persistent config.
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