regmap_bulk_read(9)

📦 version 7.3.1, in nixpkgs unstable

💅 regmap_bulk_read(9) — Kernel API Manual 🎀

okay bestie, buckle up, because this is the page where we read a whole slew of registers in one go and look iconic doing it ✨

🌸 NAME 🌸

regmap_bulk_read — read multiple sequential registers from the device 🫶

⭐ SYNOPSIS ⭐

int regmap_bulk_read (struct regmap *map , unsigned int reg , void *val
, size_t val_count );

no cap, four args, and every single one of them matters 💅

🦋 ARGUMENTS 🦋

  • map — the register map you're reading from, your main character struct 👑
  • reg — the first register you're reading from, like the starting line of a relay race 🏃‍♀️
  • val — a pointer to where the read value gets stored, and heads up: it's in native register size for the device, so don't go assuming bytes, iykyk 😭
  • val_count — how many registers you're reading. the whole squad, not just one 🎀

💖 DESCRIPTION 💖

so how do you know if it worked? easy:

  • a value of zero is returned on success, slay ✨
  • a negative errno is returned in error cases — literally the kernel's way of saying "not me crying at 3am" 💀

that's it. that's the whole vibe check. zero = we ate, negative errno = we did NOT eat 🙈

fr fr though: check that return value. negative errno is not a suggestion, it's a whole mood.

🌈 SEE ALSO 🌈

the crossover episode nobody asked for but everybody needed 🔥 — the kernel file lives at ./drivers/base/regmap/regmap.c, and here's the entire friend group:

bestie that's a lot of links and honestly? iconic. go read them all, i'll wait 🧚‍♀️

and that's the page!! shipped straight from ./drivers/base/regmap, dated October 2026, page name regmap_bulk_read(9) — go forth and read those registers sequentially, periodt 💜🌸🦋

you're gonna do amazing, ily, bye!! 💖

📦 where this page comes from