lan78xx_get_phy(9)

🎀 lan78xx_get_phy(9) 🎀

okay bestie, welcome to the Kernel API Manual page for lan78xx_get_phy(9) — it's giving “find the PHY, register the fallback, set the interface mode” and honestly it's iconic. 💅

🌸 NAME 🌸

lan78xx_get_phy — Probe or register PHY device and set interface mode, periodt. ✨

✨ SYNOPSIS ✨

struct phy_device * lan78xx_get_phy (struct lan78xx_net *dev );

🦋 ARGUMENTS 🦋

• dev — the LAN78xx device structure. that's the whole argument, bestie, and it's lowkey the main character here. 💖

🔥 DESCRIPTION 🔥

So this function is on a mission: it attempts to find a PHY on the MDIO bus. Literally searching for its PHY bestie. 👀

If no PHY is found and the chip is LAN7801, it registers a fixed PHY as fallback — no cap, that's the backup plan. 🫶

It also sets dev->interface based on the chip ID and the detected PHY type. So yes: chip identity and PHY type are both pulling strings here. 💅

⭐ RETURN ⭐

On success it gives you a valid PHY device pointer. On failure it gives you ERR_PTR. That's the contract, fr fr. 😭

🌈 SEE ALSO 🌈

• Kernel file ./drivers/net/usb/lan78xx.c 👀
• lan78xx_phy_int_ack(9)
• lan78xx_configure_usb(9)
• lan78xx_configure_flowcontrol(9)
• lan78xx_mac_eee_enable(9)
• lan78xx_set_fixed_link(9)
• lan78xx_mac_prepare_for_phy(9)
• lan78xx_configure_leds_from_dt(9)

k bye bestie! source/version: ./drivers/net/usb; date: October 2026; page: lan78xx_get_phy(9) 🫶💖✨