genphy_c45_config_aneg(9)

💖 genphy_c45_config_aneg(9) 💖

okay so bestie, welcome to the Kernel API Manual — this is a page about one tiny little function that kicks your Ethernet PHY into gear. literally the "get up and negotiate" button. let's go 🦋

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✨ NAME ✨

genphy_c45_config_aneg — restart auto-negotiation, or force a setup if auto-neg isn't the vibe 💅

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✨ SYNOPSIS ✨

int genphy_c45_config_aneg (struct phy_device *phydev );

like, it takes one thing and gives you back an int. simple. iconic. no cap. 🎀

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✨ ARGUMENTS ✨

• phydev — the target phy_device struct 🫶 that's the PHY we're doing this whole thing to, bestie. that's the main character.

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✨ DESCRIPTION ✨

okay so here's the tea ☕ — this function has two moods and it picks based on whether auto-negotiation is on:

1. if auto-negotiation is enabled — we configure the advertising (yes, we're telling the link what we can do 💁‍♀️), and then we restart auto-negotiation. glow-up complete.
2. if it's not enabled — then we force a configuration. no negotiating, just vibes and hardcoded settings, periodt.

so basically: it either restarts the negotiation or forces the setup. that's it. that's the function. ngl it's lowkey elegant ✨

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✨ SEE ALSO ✨

we're in the kernel file ./drivers/net/phy/phy-c45.c and honestly the whole friend group is here 🌈 — go say hi to:

• genphy_c45_baset1_able(9)
• genphy_c45_pma_can_sleep(9)
• genphy_c45_pma_resume(9)
• genphy_c45_pma_suspend(9)
• genphy_c45_pma_baset1_setup_master_slave(9)
• genphy_c45_pma_setup_forced(9)
• genphy_c45_an_config_aneg(9)
• genphy_c45_an_disable_aneg(9)
• genphy_c45_restart_aneg(9)
• genphy_c45_check_and_restart_aneg(9)
• genphy_c45_pma_soft_reset(9)
• genphy_c45_an_setup_master_slave(9)
• genphy_c45_read_master_slave(9)
• genphy_c45_aneg_done(9)
• genphy_c45_read_link(9)
• genphy_c45_read_lpa(9)
• genphy_c45_pma_baset1_read_master_slave(9)
• genphy_c45_read_pma(9)
• genphy_c45_read_mdix(9)
• genphy_c45_write_eee_adv(9)
• genphy_c45_read_eee_adv(9)
• genphy_c45_read_eee_lpa(9)
• genphy_c45_read_eee_cap1(9)
• genphy_c45_read_eee_cap2(9)
• genphy_c45_read_eee_abilities(9)
• genphy_c45_an_config_eee_aneg(9)
• genphy_c45_pma_baset1_read_abilities(9)
• genphy_c45_pma_read_ext_abilities(9)
• genphy_c45_pma_read_abilities(9)
• genphy_c45_read_status(9)
• genphy_c45_fast_retrain(9)
• genphy_c45_plca_get_cfg(9)
• genphy_c45_plca_set_cfg(9)
• genphy_c45_plca_get_status(9)
• genphy_c45_eee_is_active(9)
• genphy_c45_ethtool_get_eee(9)
• genphy_c45_ethtool_set_eee(9)
• oatc14_cable_test_get_result_code(9)
• genphy_c45_oatc14_cable_test_get_status(9)
• genphy_c45_oatc14_cable_test_start(9)
• oatc14_update_sqi_capability(9)
• genphy_c45_oatc14_get_sqi_max(9)
• genphy_c45_oatc14_get_sqi(9)

like, that's a whole roster 😭 and every single one of them is a real one. iykyk 💜

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💀 reminder bestie: this is kernel API, not a casual shell command. read the code, don't guess at behaviour. that's the whole rule. 🧚

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anywayyy that's the page!! sourced straight from ./drivers/net/phy, dated October 2026, and it's literally in the genphy_c45_config_aneg(9) manual section. slay, go configure your PHY, you got this 👑💖✨🌸