phylink_mii_...dvertisement(9)

💅 phylink_mii_c22_pcs_encode_advertisement(9) 💅

okay so bestie, welcome to the Kernel API Manual — this page is literally called phylink_mii_...dvertisement(9) up in the header (yes the kernel truncated its own name, tragic, but she's iconic anyway) and it's all about one very specific little helper. buckle up 🎀

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✨ NAME ✨

phylink_mii_c22_pcs_encode_advertisement — configure the clause 37 PCS advertisement

like. that's the whole gig. she encodes advertisements. for clause 37. for a PCS. slay 💅

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🦋 SYNOPSIS 🦋

int phylink_mii_c22_pcs_encode_advertisement (phy_interface_t interface
, const unsigned long *advertising );

no cap, that's the exact signature — copy it character for character or the compiler will simply end you 😭

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🌸 ARGUMENTS 🌸

• interface — the PHY interface mode being configured. this is the vibe check: what mode are we in, bestie
• advertising — the ethtool advertisement mask. this is the list of what we're out here advertising 🫶

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💖 DESCRIPTION 💖

she's a helper 💁‍♀️ — specifically for MAC PCS that supports the 802.3 clause 22 register set, for clause 37 negotiation and/or SGMII control. like, that's her whole friend group.

what she does: Encode the clause 37 PCS advertisement as specified by interface and advertising. that's it. that's the task. main character energy, minimal scope, we love a focused queen 👑

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⭐ RETURN ⭐

the new value for adv, or -EINVAL if it should not be changed.

heads up: -EINVAL here doesn't mean "oops you broke it" — it literally means it should not be changed. read the room before you start panicking 🙈

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🔥 SEE ALSO 🔥

okay this is the long part, and I mean long — the whole phylink extended universe is here. every single one, no skipping, no summarizing, we respect the lore:

• Kernel file ./drivers/net/phy/phylink.c
• struct phylink(9)
• 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_down(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_config(9)
• phylink_mii_c22_pcs_an_restart(9)
• phylink_replay_link_begin(9)
• phylink_replay_link_end(9)

like I said. the whole universe. ate. periodt 💀✨

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and that's the page, bestie 🧚 this one lives in ./drivers/net/phy and it's dated October 2026 — go forth, encode your advertisements, and stan responsibly 💜🌈