STRUCT ST_I2C_DEV(9)

💅 struct st_i2c_dev(9) — the kernel API manual, bestie edition ✨

Okay so this page is literally all about struct st_i2c_dev, and the vibe is: private data of the controller. That's it, that's the whole personality. It's the little data bag that the ST I2C controller keeps all to itself 🎀

✨ SYNOPSIS ✨

Here's the whole struct, no cap — every field, exactly as it appears:

struct st_i2c_dev {
    struct i2c_adapter      adap;
    struct device           *dev;
    void __iomem            *base;
    struct completion       complete;
    int irq;
    struct clk              *clk;
    int mode;
    u32 scl_min_width_us;
    u32 sda_min_width_us;
    struct st_i2c_client    client;
    bool busy;
 };

🦋 Members — meet the cast 🫶

• adap — the I2C adapter for this controller. main character energy honestly 👑
• dev — the device for this controller 💖
• base — virtual memory area. yes queen, memory-mapped ✨
• complete — completion of I2C message. it's giving "wait for it…" 😌
• irq — the interrupt line for the controller ⚡
• clk — the hw ssc block clock 🕰️
• mode — the I2C mode of the controller. Standard or Fast only supported — so like, don't come in here with High-Speed dreams, it's not that kind of party 💀
• scl_min_width_us — SCL line minimum pulse width in us 📏
• sda_min_width_us — SDA line minimum pulse width in us 📏
• client — I2C transfert information 🧚
• busy — I2C transfer on-going. lowkey the most relatable field in the whole struct, fr fr 🫶

🌈 SEE ALSO 🌈

Kernel file ./drivers/i2c/busses/i2c-st.c plus this whole friend group:

• struct st_i2c_timings(9)
• struct st_i2c_client(9)
• st_i2c_hw_config(9)
• st_i2c_write_tx_fifo(9)
• st_i2c_wr_fill_tx_fifo(9)
• st_i2c_rd_fill_tx_fifo(9)
• st_i2c_terminate_xfer(9)
• st_i2c_handle_write(9)
• st_i2c_handle_read(9)
• st_i2c_isr_thread(9)
• st_i2c_xfer_msg(9)
• st_i2c_xfer(9)

💀 Real talk for a sec: those parenthesised (9) numbers mean they're kernel API pages too, so go read them if you want the whole story. iykyk.

That's the page, bestie — go forth and slay your I2C transfers 💅✨

This icon was brought to you from the ./drivers/i2c/busses directory, dated October 2026, and it's all about struct st_i2c_dev(9). Stan. 🎀