of_get_pci_domain_nr(9)

📦 version 7.3.1, in nixpkgs unstable

okay so bestie, you opened the of_get_pci_domain_nr(9) page from the Kernel API Manual, and honestly? main character energy 💅✨ This one is all about finding the host bridge domain number of a given device node, and the vibe check is: it reads a property and gives you a number or a negative error. No cap.

✨ NAME ✨

of_get_pci_domain_nr — find the host bridge domain number of the given device node. 🎀

🦋 SYNOPSIS 🦋

the signature is literally right here, copy it exactly:

int of_get_pci_domain_nr (struct device_node *node );

🎀 ARGUMENTS 🎀

  • node — device tree node with the domain information. 🦋

💅 DESCRIPTION 💅

so this function will try to obtain the host bridge domain number by finding a property called linux,pci-domain of the given device node. It's giving detective energy 🔍✨

it returns the associated domain number from DT in the range [0-0xffff], or a negative value if the required property is not found. periodt 💖

🔥 RETURN 🔥

the return values are the whole plot, ngl:

  • > 0 — on success, an associated domain number. 👑
  • -EINVAL — the linux,pci-domain property does not exist. 😭
  • -ENODATA — the linux,pci-domain" property does not have value.
  • -EOVERFLOW — invalid linux,pci-domain property value. 💀

🌈 SEE ALSO 🌈

kernel file ./drivers/pci/of.c is the source spot 🏡, and the whole squad is:

signed off from the ./drivers/pci source/version 🌸, dated October 2026 🎀 — stay iconic, bestie, and may your device tree always vibe 💜

📦 where this page comes from