genphy_c45_an_config_aneg(9)

✨ genphy_c45_an_config_aneg ✨

okay so bestie, welcome to the <pink>Kernel API Manual</pink> entry for genphy_c45_an_config_aneg — this is the one that literally sets up your advertisement registers. group-chat approved 🫶

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🌸 NAME 🌸

genphy_c45_an_config_aneg — configure advertisement registers 💅

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🦋 SYNOPSIS 🦋

int genphy_c45_an_config_aneg (struct phy_device *phydev );

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🎀 ARGUMENTS 🎀

• phydev — the target phy_device struct, aka the little guy you're about to configure. main character energy fr fr 👑

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⭐ DESCRIPTION ⭐

So here's the tea 🍓: this function configures the advertisement registers based on whatever modes are set in phydev->advertising. Like, it reads the vibe check from advertising and then updates the registers to match, no cap.

And the return values? Obsessed with how clear they are:

• Returns a negative errno code on failure 😭 — something went wrong, boo.
• Returns 0 if the advertisement didn't change — like, nothing to see here, same as before 💀
• Returns 1 if the advertised modes actually changed — glow up confirmed ✨🔥

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🌈 SEE ALSO 🌈

Kernel file ./drivers/net/phy/phy-c45.c — and literally the whole phy-c45.c friend group, all in (9):

• 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_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_config_aneg(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)

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🧚 quick reminder bestie: the negative-errno / 0 / 1 return thing is the whole personality of this function. don't sleep on it. iykyk 💜

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and that's the page!! brought to you by the <bold>Kernel API Manual</bold>, straight out of ./drivers/net/phy, dated October 2026 — xoxo, genphy_c45_an_config_aneg(9) 💖✨