of_irq_parse_raw(9)

📦 version 7.3.1, in nixpkgs unstable

💅 of_irq_parse_raw — like, the manual page, bestie

Ok so you're looking at of_irq_parse_raw(9) from the Kernel API Manual, and honestly? She's a lowkey legend. Let's get into it 🫶

✨ NAME ✨

of_irq_parse_raw — low-level interrupt tree parsing. That's it, that's the vibe. 🌳

🌸 SYNOPSIS 🌸

int of_irq_parse_raw (const __be32 *addr , struct of_phandle_args
*out_irq );

Like, that's the whole signature, no cap. Copy it exactly, don't get cute with it 💅

🎀 ARGUMENTS 🎀

  • addr — the address specifier, and by that we mean the start of the "reg" property of the device, in be32 format. Big-endian girlie ✨
  • out_irq — a struct of_phandle_args that this function updates. She comes in as a struct and leaves updated, main character energy 👑

🦋 DESCRIPTION 🦋

So here's the tea: this function is a low-level interrupt tree walking function. Like, it literally walks the tree. Iconic behaviour honestly 🌈

You can use it to do a partial walk with synthesized reg and interrupts properties — for example when you're resolving PCI interrupts and there's no device node existing for the parent. Situationship with the tree, iykyk 🙈

What it actually does: it takes an interrupt specifier structure as input, walks the tree looking for any interrupt-map properties, translates the specifier for each map, and then returns the translated map. Slay, she translated it 🔥

⭐ RETURN ⭐

0 on success and a negative number on error. Simple as that, fr fr 💖

💀 NOTE 💀

Heads up bestie — the refcount of the node out_irq->np is increased by 1 on success. So like, don't forget about her, she's holding a reference now 😭

🧚 SEE ALSO 🧚

Kernel file ./drivers/of/irq.c — plus this whole friend group:

Ok that's the whole page, you ate that 🍓 This cutie came out of ./drivers/of and she's stamped October 2026 — so mark your calendar, bestie, and go parse some interrupt trees 💜✨🎀

📦 where this page comes from