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1 .. SPDX-License-Identifier: GPL-2.0
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22 with single balanced twisted-pair PHYs, as per Clause 104 of IEEE 802.3. PoDL
26 IEEE 802.3-2018 Addendums and Related Clauses
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29 Key addenda to the IEEE 802.3-2018 standard relevant to power delivery over
32 - **802.3af (Approved in 2003-06-12)**: Known as PoE in the market, detailed in
33   Clause 33, delivering up to 15.4W of power.
34 - **802.3at (Approved in 2009-09-11)**: Marketed as PoE+, enhancing PoE as
35   covered in Clause 33, increasing power delivery to up to 30W.
36 - **802.3bt (Approved in 2018-09-27)**: Known as 4PPoE in the market, outlined
37   in Clause 33. Type 3 delivers up to 60W, and Type 4 up to 100W.
38 - **802.3bu (Approved in 2016-12-07)**: Formerly referred to as PoDL, detailed
39   in Clause 104. Introduces Classes 0 - 9. Class 9 PoDL PSE delivers up to ~65W
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47 - For general PSE (PoE) code, use "c33_pse" key words. For example:
51 - For PoDL PSE - specific code, use "podl_pse". For example:
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62 10BASE-T, 100BASE-TX, or 1000BASE-T.
64 Summary of Clause 104: Power over Data Lines (PoDL) of Single Balanced Twisted-Pair Ethernet
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69 (PSEs). These are designed for use with single balanced twisted-pair Ethernet
71 'PD' to PoDL PD. The key intent is to provide devices with a unified interface
73 balanced twisted-pair Ethernet connection.