usb_of_has_combined_node(9)

💅 NAME 💅

usb_of_has_combined_node — bestie, this is the function that determines whether a device has a combined node. We’re in the Kernel API Manual, section 9, and yes, it’s iconic ✨

✨ SYNOPSIS ✨

bool usb_of_has_combined_node (struct usb_device *udev );

🎀 ARGUMENTS 🎀

• udev — the USB device. That’s the one we’re checking, no cap 💖

🦋 DESCRIPTION 🦋

Okay so this function determines whether a USB device has a so-called combined node, which is shared with its sole interface. It’s giving “device node and interface are sharing one node” energy 🫶

This is the case if and only if the device has a node and its descriptors report all of the following:

1. bDeviceClass is 0 or 9, and
2. bNumConfigurations is 1, and
3. bNumInterfaces is 1.

🌈 RETURN 🌈

True iff the device has a device node and its descriptors match the criteria for a combined node. So yeah: true when the node exists and the descriptor checklist is fully slaying ✅

💖 SEE ALSO 💖

• Kernel file ./drivers/usb/core/of.c
• usb_of_get_device_node(9)
• usb_of_get_connect_type(9)
• usb_of_get_interface_node(9)

Signed off from the source at ./drivers/usb/core, dated October 2026, in the Kernel API Manual — usb_of_has_combined_node(9) out 💅✨🫶