usb4_port_device_add(9)

💅 usb4_port_device_add(9) — your girl's guide to the Kernel API Manual ✨

okay so bestie, we're in the Kernel API Manual today, and the function we're stanning is usb4_port_device_add. it's giving "let me register a whole USB4 port device for you" and honestly? iconic. let's get into it 🫶

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✨ NAME ✨

usb4_port_device_add — Add USB4 port device 🎀

like yes, that's literally the whole job. add the port device. she's a one-line queen and she ate.

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🌸 SYNOPSIS 🌸

struct usb4_port * usb4_port_device_add (struct tb_port *port );

so she takes one single argument and hands you back a struct usb4_port *. no cap, that's the whole signature. copy it exactly, don't be weird about it 💅

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🦋 ARGUMENTS 🦋

• port — the Lane 0 adapter port to add the USB4 port. yes, Lane 0 specifically, bestie, she's not out here accepting random lanes, this is a Lane 0 situation and we respect it ⭐

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💖 DESCRIPTION 💖

she creates and registers a USB4 port device for port. that's it, that's the vibe. creation AND registration, both, in one call — main character energy fr fr 🔥

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👑 RETURN 👑

you get back a pointer to struct usb4_port 🌈 … or ERR_PTR if something went wrong 😭 so like, always check it, okay? don't just raw-dog the return value and hope. ERR_PTR is the "not me, not today" of return values 💀

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🧚 SEE ALSO 🧚

• kernel file ./drivers/thunderbolt/usb4_port.c — the home base, go read her 📂
• usb4_usb3_port_match(9)
• usb4_port_device_remove(9) — the breakup arc 💔
• usb4_port_device_resume(9) — the comeback arc ✨

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lowkey reminder: match the struct tb_port * to a Lane 0 adapter port or this whole thing is not gonna slay the way you want it to 🙈

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and that's the page, bestie! this lil' slice of the Kernel API Manual was brought to you from ./drivers/thunderbolt, dated October 2026 — mwah, go touch some thunderbolt ports 💜🎀🦋