phy_register_fixup(9)

✨ NAME ✨

okay so bestie, this is the phy_register_fixup(9) manual page — yes, the kernel API one — and it's giving “tiny function, big responsibilities” 💅. It creates a new phy_fixup and adds it to the list. register the fixup, bestie 🎀.

🌸 SYNOPSIS 🌸

this is the exact signature, no cap:

int phy_register_fixup (const char *bus_id , u32 phy_uid , u32
       phy_uid_mask , int (*run)(struct phy_device *) );

💖 ARGUMENTS 💖

okay here's the cast of characters 🫶:

• bus_id — A string which matches phydev->mdio.dev.bus_id (or NULL)
• phy_uid — Used to match against phydev->phy_id (the UID of the PHY)
• phy_uid_mask — Applied to phydev->phy_id and fixup->phy_uid before comparison (or 0 to disable id-based matching)
• run — The actual code to be run when a matching PHY is found

🦋 SEE ALSO 🦋

Kernel file ./drivers/net/phy/phy_device.c is in the group chat too — and here's the whole squad of related pages, fr fr 👑:

• phy_uses_state_machine(9)
• genphy_match_phy_device(9)
• get_phy_c45_ids(9)
• get_phy_c22_id(9)
• get_phy_device(9)
• phy_device_register(9)
• phy_device_remove(9)
• phy_get_c45_ids(9)
• phy_find_next(9)
• phy_prepare_link(9)
• phy_connect_direct(9)
• phy_connect(9)
• phy_disconnect(9)
• phy_poll_reset(9)
• phy_sfp_connect_phy(9)
• phy_sfp_disconnect_phy(9)
• phy_sfp_attach(9)
• phy_sfp_detach(9)
• phy_sfp_probe(9)
• phy_attach_direct(9)
• phy_detach(9)
• phy_reset_after_clk_enable(9)
• genphy_config_advert(9)
• genphy_c37_config_advert(9)
• genphy_setup_forced(9)
• genphy_restart_aneg(9)
• genphy_check_and_restart_aneg(9)
• __genphy_config_aneg(9)
• genphy_c37_config_aneg(9)
• genphy_aneg_done(9)
• genphy_update_link(9)
• genphy_read_status_fixed(9)
• genphy_read_status(9)
• genphy_c37_read_status(9)
• genphy_soft_reset(9)
• genphy_read_abilities(9)
• phy_remove_link_mode(9)
• phy_advertise_supported(9)
• phy_advertise_eee_all(9)
• phy_support_eee(9)
• phy_disable_eee(9)
• phy_support_sym_pause(9)
• phy_support_asym_pause(9)
• phy_set_sym_pause(9)
• phy_set_asym_pause(9)
• phy_validate_pause(9)
• phy_get_pause(9)
• phy_get_internal_delay(9)
• phy_get_tx_amplitude_gain(9)
• phy_get_mac_termination(9)
• phy_get_sfp_port(9)
• fwnode_mdio_find_device(9)
• fwnode_phy_find_device(9)
• fwnode_get_phy_node(9)
• phy_probe(9)
• phy_driver_register(9)

with so much love from ./drivers/net/phy, October 2026, on the phy_register_fixup(9) page — mwah 💋✨