yt8521_modify_bmcr_paged(9)

📦 version 7.3.1, in nixpkgs unstable

💅 yt8521_modify_bmcr_paged(9) — kernel api manual energy ✨

okay so bestie, welcome to the yt8521_modify_bmcr_paged page — this is the Kernel API Manual entry for it, and honestly? it's giving "tiny helper function with main character energy". 🎀

🌸 NAME 🌸

yt8521_modify_bmcr_paged — bits-modify a PHY's BMCR register on one page. that's it, that's the whole vibe. ✨

🦋 SYNOPSIS 🦋

int yt8521_modify_bmcr_paged (struct phy_device *phydev , int page , u16
mask , u16 set );

like, literally the whole signature, no cap. 🫶

💖 ARGUMENTS 💖

  • phydev — the phy_device struct. the main character of the operation, obvi. 👑
  • page — the reg page you wanna operate on, and it's got exactly two moods: YT8521_RSSR_FIBER_SPACE or YT8521_RSSR_UTP_SPACE. pick your fighter. 🧚
  • mask — the bit mask of bits to clear. bye-bye bits. 💀
  • set — the bit mask of bits to set. hello bits. 🔥

⭐ NOTE ⭐

so this is a convenience function, and what it does is let you modify a PHY's BMCR register like this, fr fr:

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

iconic bit math, honestly. 🧮✨

now the lore: YT8521 has two space (utp/fiber) and three mode (utp/fiber/poll), and each space has MII_BMCR. poll mode combines utp and faber, so you gotta do both. 🙈 and if it's a reset, it will wait for completion — like, it literally sits there until it's done, periodt. ⏳

returns 0 or a negative errno code. so either slay or sad. 😭

🌈 SEE ALSO 🌈

the whole friend group, in order, no one left behind (iykyk). kernel file ./drivers/net/phy/motorcomm.c, plus:

and that's the page, bestie!! 💜 this lil manual lives over in ./drivers/net/phy and it's dated October 2026 — so yeah, future vibes only. 🦋✨ go forth and modify those BMCR bits, you absolute icon. 💅🎀

📦 where this page comes from