usb_of_get_device_node(9)

💅 usb_of_get_device_node — like, the Kernel API Manual page, but make it make sense ✨

okay so bestie, welcome to the Kernel API Manual 🎀 — this is the page for usb_of_get_device_node(9), and honestly? it's a little function with a big job: finding the device tree node that belongs to a USB device. let's get into it 🦋

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✨ NAME ✨

usb_of_get_device_node — get a USB device node 👑

like, it gets the node. the device node. for a USB device. that's the whole vibe 💅

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🌸 SYNOPSIS 🌸

struct device_node * usb_of_get_device_node (struct usb_device *hub ,
int port1 );

that's the signature, copy it exactly, don't come for me 😭 — it takes a hub and a port1 and hands you back a struct device_node *.

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🫶 ARGUMENTS 🫶

• hub — the hub to which the device is connected. yes, the parent hub, like the main character that the device is attached to 🌈
• port1 — the one-based index of the port. one-based, bestie, not zero-based — so port 1 is the first port, not the second. iykyk 🙈

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💖 DESCRIPTION 💖

okay so here's the tea ☕ — this function looks up the node of a USB device, and it does it given two things: its parent hub device, and the one-based port number it lives on.

that's it. that's the whole description. no cap, it's that simple 🔥

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⭐ RETURN ⭐

so what do you actually get back? 👀

• if it finds the node — a pointer to the node, with the refcount incremented ✨ (incremented refcount, meaning you're now holding a reference, so handle it responsibly, bestie 🫶)
• otherwise — NULL 💀

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🦋 SEE ALSO 🦋

• the kernel file ./drivers/usb/core/of.c 📁 — that's where the magic lives
• usb_of_has_combined_node(9)
• usb_of_get_connect_type(9)
• usb_of_get_interface_node(9)

go read those too, they're giving sibling energy 👑

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that's the whole page, periodt. 💅 this cutie lives in ./drivers/usb/core and the date on it is October 2026 — so yeah, mark your calendar, girlies 🗓️💜 slay, go find some device nodes, and remember: incremented refcount means you have to deal with it 🌸🧚‍♀️