genphy_c45_...ad_abilities(9)

🌸 genphy_c45_pma_read_abilities(9) — Kernel API Manual 🌸

okay bestie, welcome to the Kernel API Manual 💜 this one's a lil function called genphy_c45_pma_read_abilities(9) and honestly? she's a whole vibe check for your PHY. let's get into it ✨

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✨ NAME ✨

genphy_c45_pma_read_abilities — read supported link modes from PMA 🎀

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🦋 SYNOPSIS 🦋

int genphy_c45_pma_read_abilities (struct phy_device *phydev );

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💅 ARGUMENTS 💅

• phydev — your target phy_device struct, the main character of this whole operation 👑

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🔥 DESCRIPTION 🔥

so here's the tea ☕ this function reads the supported link modes out of the PMA Status 2 register, aka 1.8 — iconic address, iykyk.

if bit 1.8.9 is set, then the list of supported modes gets built using the values sitting in the PMA Extended Abilities register, that's 1.11 — which is giving 1000BASET and 10G related modes fr fr.

and if bit 1.11.14 is also set? then the list gets further extended with the modes from the 2.5G/5G PMA Extended register, 1.21 📈 — which tells you whether 2.5GBASET and 5GBASET are supported. slay.

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🌈 SEE ALSO 🌈

no cap, this function has a massive friend group. the kernel file lives at ./drivers/net/phy/phy-c45.c, and these are all her besties 🫶

• 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_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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and that's the whole page bestie 💜 sign-off time: this lil icon comes to you from ./drivers/net/phy, dated October 2026, and it's literally the genphy_c45_...ad_abilities(9) page itself — periodt ✨🎀