ksz9477_support_eee(9)

🦋 ksz9477_support_eee(9) — like, the Kernel API Manual, but make it make sense 💅

okay so bestie, welcome to the ksz9477_support_eee(9) page from the Kernel API Manual — this is the little function that answers the question "does this port's PHY actually do EEE or not?" and honestly it ate ✨

---

🌸 NAME 🌸

ksz9477_support_eee — determine Energy Efficient Ethernet (EEE) support for a port 👑

🎀 SYNOPSIS 🎀

bool ksz9477_support_eee (struct dsa_switch *ds , int port );

✨ ARGUMENTS ✨

• ds — pointer to the DSA switch structure 🫶 like, the switch we're talking about
• port — port number to check 🔍 the one specific port you're vibe-checking

💖 DESCRIPTION 💖

So this function is also the receipts-keeper for devices where EEE was initially advertised but then later withdrawn because of reliability issues — all as described in the official errata documents 📜 no cap.

The way these devices are explicitly listed is the whole point: it records known limitations, even if there's, lowkey, no technical necessity for runtime checks. It's giving documentation as a public service, fr fr 🧚

🌈 RETURN 🌈

• true — the internal PHY on the given port supports fully operational EEE 💖 slay
• false — otherwise 🙈 nope, not this one

🔥 SEE ALSO 🔥

• Kernel file ./drivers/net/dsa/microchip/ksz9477.c 📁
• ksz9477_parse_drive_strength(9) ⭐

---

bestie reminder: true means fully operational EEE on that internal PHY, false means it isn't — that's the whole vibe check 💅

mwah 💋 that's the page! brought to you by ./drivers/net/dsa/microchip, dated October 2026 — see you in the group chat 🎀💜