phy_id_compare(9)

💫 phy_id_compare (9) — Kernel API Manual ✨

okay so bestie, welcome to phy_id_compare(9), straight out of the Kernel API Manual 💖 this one is short, sweet, and honestly kind of a little legend — it's the "do these two PHY IDs match under this mask" girlie, and she ate 🎀

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🌸 NAME 🌸

phy_id_compare — compare @id1 with @id2 taking account of @mask 💅

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✨ SYNOPSIS ✨

bool phy_id_compare (u32 id1 , u32 id2 , u32 mask );

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🦋 ARGUMENTS 🦋

• id1 — the first PHY ID, bestie. One of the two we're matching 🫶
• id2 — the second PHY ID. The other half of the vibe check ✨
• mask — the PHY ID mask, and here's the tea: the set bits are the significant ones in matching 👑 like, those are the bits that actually matter, the rest are just background noise

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💜 DESCRIPTION 💜

So here's the whole plot: it returns true if the bits from id1 and id2 specified by mask match. That's it. That's the function. Slay 🎀

Under the hood it's using an equivalent test to this:

(id & mask) == (phy_id & mask)

literally the same energy, no cap 💅

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🌈 SEE ALSO 🌈

not me listing every single sibling in the phy.h family though 😭 main character energy is strong in this header file

Kernel file ./include/linux/phy.h 👑

• enum phy_interface_t(9)
• phy_modes(9)
• rgmii_clock(9)
• struct mdio_bus_stats(9)
• struct mii_bus(9)
• mdiobus_alloc(9)
• enum phy_state(9)
• struct phy_c45_device_ids(9)
• struct phy_oatc14_sqi_capability(9)
• struct phy_device(9)
• struct phy_tdr_config(9)
• enum link_inband_signalling(9)
• struct phy_plca_cfg(9)
• struct phy_plca_status(9)
• struct phy_led(9)
• struct phy_mse_capability(9)
• struct phy_mse_snapshot(9)
• struct phy_driver(9)
• phy_id_compare_vendor(9)
• phy_id_compare_model(9)
• phydev_id_compare(9)
• phy_is_started(9)
• phy_driver_is_genphy(9)
• phy_disable_eee_mode(9)
• phy_can_wakeup(9)
• phy_may_wakeup(9)
• phy_read(9)
• __phy_read(9)
• phy_write(9)
• __phy_write(9)
• __phy_modify_changed(9)
• phy_read_mmd_poll_timeout(9)
• __phy_set_bits(9)
• __phy_clear_bits(9)
• phy_set_bits(9)
• phy_clear_bits(9)
• __phy_set_bits_mmd(9)
• __phy_clear_bits_mmd(9)
• phy_set_bits_mmd(9)
• phy_clear_bits_mmd(9)
• phy_interrupt_is_valid(9)
• phy_polling_mode(9)
• phy_has_hwtstamp(9)
• phy_has_rxtstamp(9)
• phy_has_tsinfo(9)
• phy_has_txtstamp(9)
• phy_is_default_hwtstamp(9)
• phy_on_sfp(9)
• phy_interface_mode_is_rgmii(9)
• phy_interface_mode_is_8023z(9)
• phy_interface_is_rgmii(9)
• phy_is_pseudo_fixed_link(9)
• phy_module_driver(9)

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and that's the whole page, bestie 💖 it lives in ./include/linux, and it says October 2026 on the tin — so go forth, mask your bits, compare your IDs, and remember: if the bits that mask cares about line up, you return true and you absolutely deserve it 🧚‍♀️🌸💅 periodt