__genphy_config_aneg(9)

✨ __genphy_config_aneg(9) ✨

okay so bestie, welcome to the Kernel API Manual — yes that's the whole manual name, we're in the big-leagues section 9 now 💅 and today's main character is __genphy_config_aneg. she's lowkey the one who decides whether your ethernet phy renegotiates its whole vibe with the link partner, or just gets a BMCR written at it. no cap, she's iconic.

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🌸 NAME 🌸

__genphy_config_aneg — restart auto-negotiation or write BMCR 🫶

like. that's literally her job description and she does it flawlessly.

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🦋 SYNOPSIS 🦋

int __genphy_config_aneg (struct phy_device *phydev , bool changed );

that's the whole signature, copy it exactly, don't @ me 🙈

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🎀 ARGUMENTS 🎀

• phydev — the target phy_device struct 💖 this is the phy we're doing all of this for, she's the main character of the struct world
• changed — a bool, and it tells us whether autoneg is requested 👑 iykyk

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⭐ DESCRIPTION ⭐

okay so here's the tea, and it's genuinely simple:

• if auto-negotiation is enabled, we configure the advertising, and then we restart auto-negotiation ✨
• if it is not enabled, then we write the BMCR 🌈

that's it. that's the whole function. two paths, both slay, zero notes. periodt. 💅

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🔥 SEE ALSO 🔥

this list is LONG bestie, do not skip it, every single one of these got invited to the group chat 🎊

Kernel file ./drivers/net/phy/phy_device.c — and then, alphabetically-ish, the whole squad:

• phy_uses_state_machine(9)
• phy_register_fixup(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_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)

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ngl the SEE ALSO list is giving "everyone showed up to the function's birthday party" and honestly? we love that for her 🧚🍓

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and that's the whole page, bestie 💜 sourced straight from ./drivers/net/phy, dated October 2026, and yes — __genphy_config_aneg(9) is still her name, she never changed it, she never will. mwah 🎀🌸✨