phylink_speed_down(9)

okay bestie, welcome to the Kernel API Manual page for phylink_speed_down(9) — yes, the whole vibe is right here 💖

🌸 NAME 🌸

phylink_speed_down — sets the non-SFP PHY to the lowest speed supported by both link partners. That’s the mission, periodt ✨

✨ SYNOPSIS ✨

here’s the exact signature, no cap:

int phylink_speed_down (struct phylink *pl , bool sync );

🎀 ARGUMENTS 🎀

• pl — a pointer to a struct phylink returned from phylink_create — main-character pointer energy 🫶
• sync — perform action synchronously — yes bestie, sync it up ⭐

💅 DESCRIPTION 💅

okay so, if we have a PHY that is not part of a SFP module, then set the speed as described in the phy_speed_down function. That’s the whole plot, fr fr. Please see this function for a description of the sync parameter — it’s giving “go read the other page for the sync lore” 💅

Returns zero if there is no PHY, otherwise as per phy_speed_down. iconic return behavior, honestly 😭

🦋 SEE ALSO 🦋

obsessed with cross-references? same. here’s the full lineup, bestie:

• kernel file ./drivers/net/phy/phylink.c, and struct phylink(9) — the source-file + struct besties 🦋
• phylink_set_port_modes(9)
• phylink_interface_max_speed(9)
• phylink_caps_to_link_caps(9)
• phylink_caps_to_linkmodes(9)
• phylink_limit_mac_speed(9)
• phylink_cap_from_speed_duplex(9)
• phylink_get_capabilities(9)
• phylink_validate_mask_caps(9)
• phylink_pcs_neg_mode(9)
• phylink_set_fixed_link(9)
• phylink_create(9)
• phylink_destroy(9)
• phylink_expects_phy(9)
• phylink_connect_phy(9)
• phylink_of_phy_connect(9)
• phylink_fwnode_phy_connect(9)
• phylink_disconnect_phy(9)
• phylink_mac_change(9)
• phylink_pcs_change(9)
• phylink_start(9)
• phylink_stop(9)
• phylink_rx_clk_stop_block(9)
• phylink_rx_clk_stop_unblock(9)
• phylink_suspend(9)
• phylink_prepare_resume(9)
• phylink_resume(9)
• phylink_ethtool_get_wol(9)
• phylink_ethtool_set_wol(9)
• phylink_ethtool_ksettings_get(9)
• phylink_ethtool_ksettings_set(9)
• phylink_ethtool_nway_reset(9)
• phylink_ethtool_get_pauseparam(9)
• phylink_ethtool_set_pauseparam(9)
• phylink_get_eee_err(9)
• phylink_ethtool_get_eee(9)
• phylink_ethtool_set_eee(9)
• phylink_mii_ioctl(9)
• phylink_speed_up(9)
• phylink_decode_usxgmii_word(9)
• phylink_decode_usgmii_word(9)
• phylink_mii_c22_pcs_decode_state(9)
• phylink_mii_c22_pcs_get_state(9)
• phylink_mii_c22_pcs_encode_advertisement(9)
• phylink_mii_c22_pcs_config(9)
• phylink_mii_c22_pcs_an_restart(9)
• phylink_replay_link_begin(9)
• phylink_replay_link_end(9)

signing off with source/version ./drivers/net/phy, date October 2026, and page phylink_speed_down(9) — luv u, bye bestie 💖💅