devm_regmap_init_mmio(9)

📦 version 7.3.1, in nixpkgs unstable

✨ devm_regmap_init_mmio ✨

okay so bestie, welcome to the Kernel API Manual — this is the page for devm_regmap_init_mmio, and it's literally the "set up your register map and let the kernel clean up after you" moment 🎀

🌸 NAME 🌸

devm_regmap_init_mmio — Initialise managed register map 💅

🦋 SYNOPSIS 🦋

devm_regmap_init_mmio (dev , regs , config );

that's the whole vibe, no cap ✨

🍓 ARGUMENTS 🍓

  • dev — the Device that will be interacted with 🫶 like, this is the one doing the interacting, keep up
  • regs — Pointer to memory-mapped IO region 📍 a pointer, to the mmio region, that's the whole thing
  • config — Configuration for register map ⚙️ the settings, the setup, the little blueprint for your regmap

👑 DESCRIPTION 👑

okay so here's the tea 🔥 the return value will be an ERR_PTR on error, or a valid pointer to a struct regmap. so like, check your return values, bestie, fr fr 😭

the regmap will be automatically freed by the device management code — that's the "devm" part doing its main character thing, you don't have to free it yourself, she handles it 💅✨

and Implies 'fast_io'. that's it, that's the note, it just implies it 🧚

🌈 SEE ALSO 🌈

okay this list is LONG but we're listing every single one because I said so 👑 no skipping, periodt:

Kernel file ./include/linux/regmap.h — plus all of these besties:

fr fr that's all of them, every last one, I counted 💀

mwah 💖 this page came from ./include/linux and it's dated October 2026 — and it's signed off as devm_regmap_init_mmio(9) because we stay on brand around here 🫶✨

📦 where this page comes from