yt8821_modif...p_fiber_bmcr(9)

📦 version 7.3.1, in nixpkgs unstable

welcome to the Kernel API Manual, bestie 💖 this page's manual name is yt8821_modif...p_fiber_bmcr(9), and today's main-character function is yt8821_modify_utp_fiber_bmcr(9). let's get into it, no cap ✨

💖 NAME 💖

yt8821_modify_utp_fiber_bmcr — bits modify a PHY's BMCR register. yes bestie, that's the official phrasing and we're keeping it 💅

🌸 SYNOPSIS 🌸

okay so the signature is literally this, untouched and iconic:

int yt8821_modify_utp_fiber_bmcr (struct phy_device *phydev , u16 mask ,
       u16 set );

🎀 ARGUMENTS 🎀

  • phydev — the phy_device struct. that's the PHY device you're working with 🫶
  • mask — bit mask of bits to clear. iykyk, these are the ones getting cleared ✨
  • set — bit mask of bits to set. these are the ones going in 💅

💅 NOTE 💅

this is a convenience function 🫶 it allows a PHY's BMCR register to be modified as:

new register value = (old register value & ~mask) | set

that's the formula, bestie. periodt 🧮

🦋 RETURN 🦋

0 or negative errno code. that's the whole return story 😌

🌈 SEE ALSO 🌈

Kernel file: ./drivers/net/phy/motorcomm.c — go peek, bestie 📂

and the whole function friend group is here, every single one invited to the group chat 💬

mwah 💋 — from ./drivers/net/phy, October 2026, in the yt8821_modif...p_fiber_bmcr(9) manual. stay iconic, bestie 🎀✨

📦 where this page comes from