genphy_aneg_done(9)

💅 genphy_aneg_done(9) — the Kernel API Manual moment

okay so bestie, you've wandered into the Kernel API Manual and honestly? iconic. we're talking about genphy_aneg_done(9) today, and yes it's a mouthful, but it's giving "tiny function, huge responsibility." let's go ✨

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🌸 NAME 🌸

genphy_aneg_done — return auto-negotiation status

like, it literally just tells you where auto-negotiation is at. that's the whole job. main character energy fr fr 💅

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🦋 SYNOPSIS 🦋

int genphy_aneg_done (struct phy_device *phydev );

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🎀 ARGUMENTS 🎀

• phydev — the target phy_device struct 🫶 like, the phy device you're asking about. that's your girl. hand her over and she'll get checked.

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⭐ DESCRIPTION ⭐

So here's the tea ☕ — the function reads the status register and returns 0 in either of these two situations:

• auto-negotiation is incomplete (still cooking, not done yet 🙈), or
• there was an error (oops 💀)

and then — plot twist — it returns BMSR_ANEGCOMPLETE if auto-negotiation is done. that's it. that's the whole vibe check. slay 👑

no cap, 0 is doing double duty here: "not finished" and "something went wrong" both land on 0. so don't go assuming 0 means everything's chill 😭

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🔥 SEE ALSO 🔥

the whole phy friend group showed up to this one, bestie. every single one. go say hi 👋

• 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_config_aneg(9)
• genphy_c37_config_aneg(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)

also the kernel file ./drivers/net/phy/phy_device.c — that's where the magic lives, iykyk 🧚

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okay that's the whole page bestie, you ate that 💜 this lil manspage is served from ./drivers/net/phy and it's stamped October 2026 — so like, future-dated slay 🌈 bye pookie, go read your status register 🎀