regulator_register(9)

📦 version 7.3.1, in nixpkgs unstable

💅 regulator_register(9) — the "make this regulator exist" era ✨

okay so first things first: this is a page from the Kernel API Manual, section 9, and we're talking about regulator_register(9). buckle up bestie, it's a short one but it's important 🫶

🌸 NAME 🌸

regulator_register — register a regulator. that's it. that's the whole vibe. no cap 💅

✨ SYNOPSIS ✨

struct regulator_dev * regulator_register (struct device *dev , const
       struct regulator_desc *regulator_desc , const struct regulator_config
       *cfg );

literally three args, one return value, and a whole lot of power in your hands 🔥

🎀 ARGUMENTS 🎀

  • dev — the device that drives the regulator. like, the one holding the aux cord 🎧
  • regulator_desc — the regulator you're registering. this is the main character of the operation 👑
  • cfg — the runtime configuration for the regulator. all the settings, all the vibes, all the knobs 🎛️

🦋 DESCRIPTION 🦋

so here's the tea ☕ — this function is called by regulator drivers to register a regulator. that's it. that's the assignment. driver says "hey, i have a regulator," kernel says "say less, bestie," and regulator_register makes it official 💖

no extra steps, no hidden lore, the doc is genuinely this chill. iconic behavior, honestly ✨

🌈 RETURN 🌈

  • on success → you get a pointer to a valid struct regulator_dev 🎉 slay
  • on failure → you get an ERR_PTR encoded negative error number 😭 so like. check that thing with IS_ERR() before you start celebrating, fr fr
ngl the "negative error number wrapped in a pointer" thing is giving cursed but it's the kernel way and honestly? we respect it 💀

⭐ SEE ALSO ⭐

okay this section is massive, bestie — the regulator subsystem has a whole friend group and they ALL showed up to the party 🎊 the kernel file to check is ./drivers/regulator/core.c, and here's the full squad:

like i said. HUGE friend group. iykyk 💜

and that's the whole page, bestie — go register some regulators and remember: check your ERR_PTR before you trust it 🧚‍♀️

mwah 💋 this has been regulator_register(9) from the ./drivers/regulator corner of the kernel, dated October 2026 — see u in the next man page, love u, bye 🎀

📦 where this page comes from