mdio_read(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 mdio_read(9) — the Kernel API Manual, bestie edition ✨

Okay so real talk, this is a page from the Kernel API Manual, and today's main character is mdio_read — your girl reads MII PHY registers and she does it flawlessly. 💅

✨ NAME ✨

mdio_read — read MII PHY register 🎀

🦋 SYNOPSIS 🦋

int mdio_read (struct net_device *net_dev , int phy_id , int location );

That's the whole vibe. Three args, one int coming back at you. Slay. ⭐

💖 ARGUMENTS 💖

  • net_dev — the net device you wanna read from, like, the actual thing 💻
  • phy_id — the phy address you're reading, iykyk 🧚
  • location — the phy register id you're reading, the specific lil spot 👑

🌈 DESCRIPTION 🌈

So the way this works: it reads MII registers through MDIO and MDC, using the MDIO management frame structure and protocol — which, no cap, is defined by ISO/IEC. 📜✨

For the full lore, go check the SiS7014 or ICS spec, bestie. That's where the details live. 🫶

💜 SEE ALSO 💜

The kernel file ./drivers/net/ethernet/sis/sis900.c is the friend group, and honestly the whole squad showed up:

That's the whole group chat, no one left on read. 😭💀

Fr fr though — everything above is literally just this one page's world. Don't go reading registers off-spec and then act surprised, okay? 🙈

And that's a wrap, bestie! 🎀 This iconic lil page comes to you from ./drivers/net/ethernet/sis, dated October 2026. Stan mdio_read. Periodt. 👑💖

📦 where this page comes from