STRUCT STM32F4_I2C_DEV(9)

📦 version 7.3.1, in nixpkgs unstable

🦋 struct stm32f4_i2c_dev(9) — the private-data glow-up 🦋

okay so this is a page from the Kernel API Manual, and bestie, we're talking about struct stm32f4_i2c_dev — literally the private data of the controller. it's giving backstage-pass energy: all the stuff the I2C controller keeps to itself and doesn't show the world. iykyk 💅

✨ NAME ✨

struct stm32f4_i2c_dev — the private data of the controller. no cap, that's the whole vibe. 🎀

🌸 SYNOPSIS 🌸

struct stm32f4_i2c_dev {
    struct i2c_adapter adap;
    struct device *dev;
    void __iomem *base;
    struct completion complete;
    struct clk *clk;
    int speed;
    int parent_rate;
    struct stm32f4_i2c_msg msg;
 };

like, that's the whole struct, verbatim, don't @ me 🫶

💖 Members 💖

(the original just calls this "Members" so we're keeping it, but know that we are obsessed with each one)

  • adap — the I2C adapter for this controller. it's literally the controller's main character energy in the I2C subsystem ✨
  • dev — the device for this controller. yes bestie, the struct device * — the whole device-model hookup 🌸
  • base — the virtual memory area. like, the mapped-in address space where the registers live 🦋
  • complete — the completion of the I2C message. it's how the driver signals "hey, that message is DONE" 😭
  • clk — the hw i2c clock. hardware clock, not a vibe 💅
  • speed — the I2C clock frequency of the controller. and heads up: Standard or Fast are supported — those are the only two, so don't come for anything else 🔥
  • parent_rate — the I2C clock parent rate, in MHz. note the units, they matter fr fr ⭐
  • msg — the I2C transfer information. a struct stm32f4_i2c_msg, holding the deets of the transfer in flight 🎀

👑 SEE ALSO 👑

if you wanna keep the rabbit hole going (and you do, bestie):

like, that's the whole group chat. read them all, slay 💜

that's the page, periodt. this one lives in ./drivers/i2c/busses, and the date on it is October 2026 — so yeah, mark your calendar bestie, it's a whole era 🗓️🌈💖

📦 where this page comes from