yt8521_fiber_setup_forced(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 yt8521_fiber_setup_forced — like, the whole vibe ✨

okay bestie, listen 💖 this page is from the Kernel API Manual, section 9 — so we're deep in kernel-driver territory, but don't panic, it's literally just one function and she's not even complicated.

✨ NAME ✨

yt8521_fiber_setup_forced — configures and/or forces the speed from @phydev 🎀

🦋 SYNOPSIS 🦋

int yt8521_fiber_setup_forced (struct phy_device *phydev );

that's it. that's the whole signature. she's giving minimalism 💅

🌸 ARGUMENTS 🌸

  • phydev — the target phy_device struct 💜 this is the thing you're pointing at, the main character of the operation, the one whose speed is about to get configured/forced. no phydev, no function. periodt.

👑 NOTE 👑

bestie. read this one twice, fr fr 🙈

The caller must have taken the MDIO bus lock. like, not "should", not "ideally" — must. this is not a drill. lock it first, then call.

And when it's done it returns 0 or a negative errno code. that's it. 0 = slay, negative = something's wrong, check the errno and go off 🔥

🧚 SEE ALSO 🧚

okay this list is LONG, like genuinely iconic levels of cross-referencing, but it's basically the whole friend group of this driver, so here we go 🌈

Kernel file: ./drivers/net/phy/motorcomm.c

🫶 reminder bestie: take the MDIO bus lock before you call this. it's in the NOTE for a reason, we don't skip the NOTE.

mwah 💋 that's the whole page — lovingly sourced from ./drivers/net/phy, dated October 2026, from the Kernel API Manual. go configure some fiber, you got this 🎀✨

📦 where this page comes from