__phy_read(9)

💖 __phy_read 💖

okay so bestie, welcome to the Kernel API Manual page for __phy_read — a convenience function for reading a given PHY register, and it’s highkey iconic. 💅

🌸 NAME 🌸

__phy_read — a convenience function for reading a given PHY register ✨

🎀 SYNOPSIS 🎀

the signature is literally giving:

int __phy_read (struct phy_device *phydev , u32 regnum );

🦋 ARGUMENTS 🦋

• phydev — the phy_device struct 🫶
• regnum — register number to read 🔥

💜 DESCRIPTION 💜

bestie, listen closely: the caller must have taken the MDIO bus lock. that’s the rule, no cap. 💅

the caller must have taken the MDIO bus lock. periodt. 🎀

👑 SEE ALSO 👑

Kernel file ./include/linux/phy.h — and the whole reference friend group ate:

• 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(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_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)

source/version: ./include/linux · date: October 2026 — stay hydrated and keep that MDIO bus lock energy, bestie 💖✨