kernel/linux.git/drivers/net/pse-pd, branch v6.19.11

net: pse-pd: tps23881: Add support for TPS23881B

2025-11-01T00:56:32+00:00

The TPS23881B uses different firmware than the TPS23881. Trying to load the TPS23881 firmware on a TPS23881B device fails and must be omitted. The TPS23881B ships with a more recent ROM firmware. Moreover, no updated firmware has been released yet and so the firmware loading step must be skipped. As of today, the TPS23881B is intended to use its ROM firmware. Signed-off-by: Thomas Wismer Reviewed-by: Kory Maincent Acked-by: Oleksij Rempel Link: https://patch.msgid.link/20251029212312.108749-2-thomas@wismer.xyz Signed-off-by: Jakub Kicinski

net: pse-pd: pd692x0: Preserve PSE configuration across reboots

2025-10-16T00:50:29+00:00

Detect when PSE hardware is already configured (user byte == 42) and skip hardware initialization to prevent power interruption to connected devices during system reboots. Previously, the driver would always reconfigure the PSE hardware on probe, causing a port matrix reflash that resulted in temporary power loss to all connected devices. This change maintains power continuity by preserving existing configuration when the PSE has been previously initialized. Signed-off-by: Kory Maincent Reviewed-by: Simon Horman Link: https://patch.msgid.link/20251013-feature_pd692x0_reboot_keep_conf-v2-3-68ab082a93dd@bootlin.com Signed-off-by: Jakub Kicinski

net: pse-pd: pd692x0: Separate configuration parsing from hardware setup

2025-10-16T00:50:28+00:00

Cache the port matrix configuration in driver private data to enable PSE controller reconfiguration. This refactoring separates device tree parsing from hardware configuration application, allowing settings to be reapplied without reparsing the device tree. This refactoring is a prerequisite for preserving PSE configuration across reboots to prevent power disruption to connected devices. Signed-off-by: Kory Maincent Reviewed-by: Simon Horman Link: https://patch.msgid.link/20251013-feature_pd692x0_reboot_keep_conf-v2-2-68ab082a93dd@bootlin.com Signed-off-by: Jakub Kicinski

net: pse-pd: pd692x0: Replace __free macro with explicit kfree calls

2025-10-16T00:50:28+00:00

Replace __free(kfree) with explicit kfree() calls to follow the net subsystem policy of avoiding automatic cleanup macros as described in the documentation. Signed-off-by: Kory Maincent Reviewed-by: Simon Horman Link: https://patch.msgid.link/20251013-feature_pd692x0_reboot_keep_conf-v2-1-68ab082a93dd@bootlin.com Signed-off-by: Jakub Kicinski

net: pse-pd: tps23881: Fix current measurement scaling

2025-10-08T01:30:53+00:00

The TPS23881 improves on the TPS23880 with current sense resistors reduced from 255 mOhm to 200 mOhm. This has a direct impact on the scaling of the current measurement. However, the latest TPS23881 data sheet from May 2023 still shows the scaling of the TPS23880 model. Fixes: 7f076ce3f1733 ("net: pse-pd: tps23881: Add support for power limit and measurement features") Signed-off-by: Thomas Wismer Acked-by: Kory Maincent Link: https://patch.msgid.link/20251006204029.7169-2-thomas@wismer.xyz Signed-off-by: Jakub Kicinski

net: pse-pd: Add Si3474 PSE controller driver

2025-08-28T12:41:59+00:00

Add a driver for the Skyworks Si3474 I2C Power Sourcing Equipment controller. Driver supports basic features of Si3474 IC: - get port status, - get port power, - get port voltage, - enable/disable port power. Only 4p configurations are supported at this moment. Signed-off-by: Piotr Kubik Reviewed-by: Kory Maincent Link: https://patch.msgid.link/9b72c8cd-c8d3-4053-9c80-671b9481d166@adtran.com Signed-off-by: Paolo Abeni

net: pse-pd: pd692x0: Skip power budget configuration when undefined

2025-08-21T14:56:08+00:00

If the power supply's power budget is not defined in the device tree, the current code still requests power and configures the PSE manager with a 0W power limit, which is undesirable behavior. Skip power budget configuration entirely when the budget is zero, avoiding unnecessary power requests and preventing invalid 0W limits from being set on the PSE manager. Fixes: 359754013e6a ("net: pse-pd: pd692x0: Add support for PSE PI priority feature") Signed-off-by: Kory Maincent Acked-by: Oleksij Rempel Link: https://patch.msgid.link/20250820133321.841054-1-kory.maincent@bootlin.com Signed-off-by: Jakub Kicinski

net: pse-pd: pd692x0: Fix power budget leak in manager setup error path

2025-08-21T14:55:40+00:00

Fix a resource leak where manager power budgets were freed on both success and error paths during manager setup. Power budgets should only be freed on error paths after regulator registration or during driver removal. Refactor cleanup logic by extracting OF node cleanup and power budget freeing into separate helper functions for better maintainability. Fixes: 359754013e6a ("net: pse-pd: pd692x0: Add support for PSE PI priority feature") Signed-off-by: Kory Maincent Link: https://patch.msgid.link/20250820132708.837255-1-kory.maincent@bootlin.com Signed-off-by: Jakub Kicinski

net: pse-pd: pd692x0: reduce stack usage in pd692x0_setup_pi_matrix

2025-07-11T01:05:36+00:00

The pd692x0_manager array in this function is really too big to fit on the stack, though this never triggered a warning until a recent patch made it slightly bigger: drivers/net/pse-pd/pd692x0.c: In function 'pd692x0_setup_pi_matrix': drivers/net/pse-pd/pd692x0.c:1210:1: error: the frame size of 1584 bytes is larger than 1536 bytes [-Werror=frame-larger-than=] Change the function to dynamically allocate the array here. Fixes: 359754013e6a ("net: pse-pd: pd692x0: Add support for PSE PI priority feature") Signed-off-by: Arnd Bergmann Reviewed-by: Kory Maincent Link: https://patch.msgid.link/20250709153210.1920125-1-arnd@kernel.org Signed-off-by: Jakub Kicinski

net: pse-pd: tps23881: Add support for static port priority feature

2025-06-19T02:00:18+00:00

This patch enhances PSE callbacks by introducing support for the static port priority feature. It extends interrupt management to handle and report detection, classification, and disconnection events. Additionally, it introduces the pi_get_pw_req() callback, which provides information about the power requested by the Powered Devices. Interrupt support is essential for the proper functioning of the TPS23881 controller. Without it, after a power-on (PWON), the controller will no longer perform detection and classification. This could lead to potential hazards, such as connecting a non-PoE device after a PoE device, which might result in magic smoke. Signed-off-by: Kory Maincent (Dent Project) Reviewed-by: Oleksij Rempel Link: https://patch.msgid.link/20250617-feature_poe_port_prio-v14-12-78a1a645e2ee@bootlin.com Signed-off-by: Jakub Kicinski