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Kory Maincent says: ==================== Add support for PSE budget evaluation strategy This series brings support for budget evaluation strategy in the PSE subsystem. PSE controllers can set priorities to decide which ports should be turned off in case of special events like over-current. This patch series adds support for two budget evaluation strategy. 1. Static Method: This method involves distributing power based on PD classification. It’s straightforward and stable, the PSE core keeping track of the budget and subtracting the power requested by each PD’s class. Advantages: Every PD gets its promised power at any time, which guarantees reliability. Disadvantages: PD classification steps are large, meaning devices request much more power than they actually need. As a result, the power supply may only operate at, say, 50% capacity, which is inefficient and wastes money. 2. Dynamic Method: To address the inefficiencies of the static method, vendors like Microchip have introduced dynamic power budgeting, as seen in the PD692x0 firmware. This method monitors the current consumption per port and subtracts it from the available power budget. When the budget is exceeded, lower-priority ports are shut down. Advantages: This method optimizes resource utilization, saving costs. Disadvantages: Low-priority devices may experience instability. The UAPI allows adding support for software port priority mode managed from userspace later if needed. Patches 1-2: Add support for interrupt event report in PSE core, ethtool and ethtool specs. Patch 3: Adds support for interrupt and event report in TPS23881 driver. Patches 4,5: Add support for PSE power domain in PSE core and ethtool. Patches 6-8: Add support for budget evaluation strategy in PSE core, ethtool and ethtool specs. Patches 9-11: Add support for port priority and power supplies in PD692x0 drivers. Patches 12,13: Add support for port priority in TPS23881 drivers. ==================== Link: https://patch.msgid.link/20250617-feature_poe_port_prio-v14-0-78a1a645e2ee@bootlin.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Linux kernel
============
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