__phy_write(9)

💖 __phy_write(9) 💖

okay bestie, welcome to the Kernel API Manual page for __phy_write 💅 — yes, the double-underscore one. It's literally a convenience function for writing a given PHY register, and the vibe is very “small helper, big main character energy” ✨. No cap.

🌸 NAME 🌸

__phy_write — convenience function for writing a given PHY register 🎀

✨ SYNOPSIS ✨

int __phy_write (struct phy_device *phydev , u32 regnum , u16 val );

🎀 ARGUMENTS 🎀

• phydev — the phy_device struct 🫶
• regnum — register number to write, iykyk 🔥
• val — value to write to regnum 💜

🔥 DESCRIPTION 🔥

okay so, real talk: the caller must have taken the MDIO bus lock. No cap. That's the whole requirement, and it is not optional — the caller must have taken the MDIO bus lock. Periodt. 💅

🚨 bestie, this is the important caveat: the caller must have taken the MDIO bus lock. Do not sleep on it.

🌈 SEE ALSO 🌈

okay bestie, this list is literally a whole group chat — every single reference is here, no cap 👑:

• 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(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_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)

mwah 💋 this page is from the ./include/linux source/version and is dated October 2026 — __phy_write(9) fr fr, periodt. 🫶