get_phy_c45_ids(9)

🌸 get_phy_c45_ids(9) — Kernel API Manual 💅

okay bestie, welcome to the little corner of the Kernel API Manual where we read 802.3-c45 IDs. no cap, it’s giving “small function, very specific job” energy. ✨

✨ NAME ✨

get_phy_c45_ids — reads the specified addr for its 802.3-c45 IDs.

🎀 SYNOPSIS 🎀

the signature, literally:

int get_phy_c45_ids (struct mii_bus *bus , int addr , struct
       phy_c45_device_ids *c45_ids );

🦋 ARGUMENTS 🦋

• bus — the target MII bus. that’s the bus we’re working with, bestie.
• addr — PHY address on the MII bus. yes, the actual address, slay.
• c45_ids — where to store the c45 ID information. that’s the output spot. 🫶

💖 DESCRIPTION 💖

okay so this function reads the PHY "devices in package". if that looks valid, it reads the PHY identifiers for each device. then it returns the "devices in package" and the identifiers in c45_ids. 🎀

Returns zero on success, -EIO on bus access error, or -ENODEV if the "devices in package" is invalid or no device responds. that’s the whole return vibe check, periodt. 💅

🌈 SEE ALSO 🌈

the kernel file and the whole friend group, fr fr:

• Kernel file: ./drivers/net/phy/phy_device.c
• phy_uses_state_machine(9)
• phy_register_fixup(9)
• genphy_match_phy_device(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)

mwah 💋 this page is from ./drivers/net/phy, dated October 2026, and it’s literally get_phy_c45_ids(9). bye bestie, go read those c45 IDs 🫶✨