phy_config_inband(9)

💖 phy_config_inband(9) — the kernel API manual, but make it make sense 💖

okay bestie, so this one is from the kernel API manual (that's the 9 section, section nine, kernel developer stuff, iykyk) and it's literally called phy_config_inband. say it with me: phy. config. in-band. it's giving "small function, huge responsibility" energy and honestly? we're obsessed. 💅

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✨ NAME ✨

phy_config_inband — configure the desired PHY in-band mode 🎀

like, it sets up the in-band mode you want on the PHY. that's the whole gig. no cap.

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🌸 SYNOPSIS 🌸

int phy_config_inband (struct phy_device *phydev , unsigned int modes );

look at her. two args, returns an int, absolutely iconic. 👑

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🦋 ARGUMENTS 🦋

• phydev — the phy_device struct 💜 like, the actual PHY device you're working with. your main character.
• modes — the in-band modes to configure ✨ as an unsigned int, bestie. this is where you say what you want.

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🧚 DESCRIPTION 🧚

so what does it actually do? it disables, enables, or enables-with-bypass in-band signalling between the PHY and the host system. 🔥

that's the vibe check: three flavours of in-band signalling situation, and this function is the one configuring it. not me being obsessed with a signalling path between the PHY and the host system 😭 it's just that good.

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⭐ RETURN ⭐

• zero on success 🌈
• or a negative errno value 💀 (so, you know, check it. always check it. fr fr)

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👑 SEE ALSO 👑

okay this list is LONG and it ate, so buckle up bestie 🫶 also heads up, the kernel file is ./drivers/net/phy/phy.c ✨

• phy_print_status(9)
• phy_get_rate_matching(9)
• phy_config_interrupt(9)
• phy_restart_aneg(9)
• phy_aneg_done(9)
• phy_supported_speeds(9)
• phy_check_valid(9)
• phy_sanitize_settings(9)
• phy_mii_ioctl(9)
• phy_do_ioctl(9)
• phy_do_ioctl_running(9)
• __phy_hwtstamp_get(9)
• __phy_hwtstamp_set(9)
• phy_queue_state_machine(9)
• phy_trigger_machine(9)
• phy_ethtool_get_strings(9)
• phy_ethtool_get_sset_count(9)
• phy_ethtool_get_stats(9)
• __phy_ethtool_get_phy_stats(9)
• __phy_ethtool_get_link_ext_stats(9)
• phy_ethtool_get_plca_cfg(9)
• plca_check_valid(9)
• phy_ethtool_set_plca_cfg(9)
• phy_ethtool_get_plca_status(9)
• phy_start_cable_test(9)
• phy_start_cable_test_tdr(9)
• phy_check_link_status(9)
• phy_inband_caps(9)
• _phy_start_aneg(9)
• phy_start_aneg(9)
• phy_speed_down(9)
• phy_speed_up(9)
• phy_start_machine(9)
• phy_stop_machine(9)
• phy_error(9)
• phy_write_barrier(9)
• phy_disable_interrupts(9)
• phy_interrupt(9)
• phy_enable_interrupts(9)
• phy_update_stats(9)
• phy_request_interrupt(9)
• phy_free_interrupt(9)
• phy_get_next_update_time(9)
• phy_state_machine(9)
• phy_stop(9)
• phy_start(9)
• phy_mac_interrupt(9)
• phy_loopback(9)
• phy_eee_tx_clock_stop_capable(9)
• phy_eee_rx_clock_stop(9)
• phy_init_eee(9)
• phy_get_eee_err(9)
• phy_ethtool_get_eee(9)
• phy_ethtool_set_eee_noneg(9)
• phy_ethtool_set_eee(9)
• phy_ethtool_set_wol(9)
• phy_ethtool_get_wol(9)
• phy_ethtool_nway_reset(9)

lowkey this whole list is the PHY extended universe and we stan every single entry 💖 read them, bestie. they're all literally in ./drivers/net/phy/phy.c.

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that's the page 🎀 and for the sign-off: this little beauty lives under ./drivers/net/phy and it's dated October 2026 — so yes, we're reading from the future and it's still slaying ✨🌸🦋💜