intel_scu_ipc_dev_writev(9)

📦 version 7.3.1, in nixpkgs unstable

💅 intel_scu_ipc_dev_writev — bestie's guide to writing registers ✨

okay so like, this is a kernel API manual thingy from the Kernel API Manual besties, and it's literally about writing a bunch of registers at once. no cap, it's giving "I need to poke the SCU" energy and honestly? iconic. let me break it down for you 🫶

✨ SYNOPSIS ✨

int intel_scu_ipc_dev_writev (struct intel_scu_ipc_dev *scu , u16 *addr
, u8 *data , size_t len );

like, that's the whole vibe. you pass a bunch of stuff and it returns an int. slay. 💖

🎀 ARGUMENTS 🎀

  • scu — Optional SCU IPC instance — it's optional bestie, so if you don't have one, that's fine, no pressure 💅
  • addr — Register list — this is your list of registers, like the little addresses you wanna hit up ✨
  • data — Bytes to write — the actual bytes you're sending into those registers, periodt 🦋
  • len — Length of array — how many items are in your array, keep track bestie 🔥

🌸 DESCRIPTION 🌸

so like, this function writes registers. that's the whole thing. it returns 0 on success or an error code if things go sideways 😭. and the best part? all locking between SCU accesses is handled for the caller — like, you don't have to worry about any of that mess, it's all taken care of. main character energy fr fr 👑

the largest array length permitted by the hardware is 5 items. that's the hardware's limit, not mine, don't come for me 💀. so like, keep your len at 5 or below, iykyk.

and listen — this function may sleep. that's actually highkey important bestie, so don't go calling it from atomic context or anywhere that can't snooze. it's giving "chill vibes only" 😴💜

🦋 SEE ALSO 🦋

okay so here's the whole friend group, all these functions are literally connected and you should probably check them out:

like, that's the whole squad right there, no gatekeeping 🌈💖

bestie warning 🚨: this function may sleep — do not call it from atomic context or interrupt handlers. that's not a vibe. also the hardware max is 5 items, so don't try to be extra. 💀

and that's the tea, bestie 🍓 this page is from the Kernel API Manual, dated October 2026, and lives at ./drivers/platform/x86 — go check out the source file if you wanna see the whole thing, it's literally right there. mwah 💋✨🎀

📦 where this page comes from