scmi_get_protocol_instance(9)

📦 version 7.3.1, in nixpkgs unstable

💅 scmi_get_protocol_instance — a Kernel API Manual moment ✨

okay so bestie, welcome to the Kernel API Manual entry for scmi_get_protocol_instance(9) — this is the little helper that gets your protocol all set up and glowing 🫶

🌸 NAME 🌸

scmi_get_protocol_instance — the protocol initialization helper, periodt. Like, it literally exists to get your protocol an instance and it ate 💅

✨ SYNOPSIS ✨

struct scmi_protocol_instance * scmi_get_protocol_instance (const struct scmi_handle *handle , u8 protocol_id );

🎀 ARGUMENTS 🎀

  • handle — a reference to the SCMI platform instance. that's your whole vibe anchor, bestie 💖
  • protocol_id — the protocol you're requesting. the one you want. the main character 👑

🦋 DESCRIPTION 🦋

so here's the tea ☕ — if the protocol you want has never been requested before for this particular instance, this function goes ahead and allocates and initializes all the needed structures for you 🧚 and while it's doing that it handles the resource allocation with a dedicated per-protocol devres subgroup. no cap, it's very organized about it ✨

if it's been requested before? then it's already got the goods and you're chilling 🌈

🔥 RETURN 🔥

You get back a reference to an initialized protocol instance 🎉 — or an error on failure. and lowkey the one you'll wanna know about: it returns -EPROBE_DEFER in particular when the desired protocol could NOT be found 😭 so like, don't panic, it just means try again later fr fr 💀

bestie if you see -EPROBE_DEFER it's not a crash, it's the protocol not being there yet. breathe. 🫶

🌟 SEE ALSO 🌟

the kernel file ./drivers/firmware/arm_scmi/driver.c — literally the source of truth 💖

and a whole friend group of functions and structs you should also go say hi to 👇

and that's the whole page, bestie 🍓💜 this one comes from ./drivers/firmware/arm_scmi, dated October 2026 — so go forth, get your protocol instance, and slay ✨👑💅

📦 where this page comes from