devm_regmap_init_mmio_clk(9)

📦 version 7.3.1, in nixpkgs unstable

💅 devm_regmap_init_mmio_clk — Kernel API Manual ✨

okay so bestie, we're in the Kernel API Manual today and this little cutie is called devm_regmap_init_mmio_clk. it's giving "managed register map, but make it clock-aware" 🕰️ and honestly? iconic.

🌸 NAME

devm_regmap_init_mmio_clk — Initialise managed register map with clock 💖

like, it sets up your regmap, it's managed (so nobody has to hand-free it), and there's a clock involved. slay.

✨ SYNOPSIS

devm_regmap_init_mmio_clk (dev , clk_id , regs , config );

that's the whole vibe check right there — four args, no cap.

🎀 ARGUMENTS

  • dev — the Device that will be interacted with. your main character device, fr fr 🫶
  • clk_id — the register clock consumer ID. that's how you tell it which clock is your clock 🕰️
  • regs — a Pointer to memory-mapped IO region. the actual memory real estate, lowkey the whole point 🗺️
  • config — Configuration for register map. all the settings, all the vibes ⚙️

🦋 DESCRIPTION

so here's the tea: the return value will be an ERR_PTR on error, or a valid pointer to a struct regmap 💖. you gotta check it, bestie — do not just assume it worked, that's not the energy we're bringing 🔥.

the regmap will be automatically freed by the device management code ✨ — that's the "devm" part, that's the whole managed moment, you literally don't have to lift a finger 💅.

and it Implies 'fast_io' 👑. yes queen, fast io is baked in.

🌈 SEE ALSO

grab a snack, this list is long and we're getting through all of it 🍓:

Kernel file ./include/linux/regmap.h 🧚, plus:

like I said. long list. we ate though 💅

okay that's the whole page bestie!! 💜 this one lives in ./include/linux (the Kernel API Manual fam 🫶), it's dated October 2026 ⭐, and the page itself is devm_regmap_init_mmio_clk(9) — go forth and initialise those managed register maps responsibly, mwah 💖🎀

📦 where this page comes from