STRUCT NMK_I2C_DEV(9)

✨ struct nmk_i2c_dev(9) ✨

okay bestie, welcome to the Kernel API Manual — this one's about struct nmk_i2c_dev, which is literally the private data structure of the controller 💅 it's giving "backstage pass to the I2C drama," and honestly? obsessed.

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🌸 NAME 🌸

struct nmk_i2c_dev — the controller's own lil private data structure, no cap.

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🦋 SYNOPSIS 🦋

struct nmk_i2c_dev {
    struct i2c_vendor_data          *vendor;
    struct amba_device              *adev;
    struct i2c_adapter              adap;
    int irq;
    void __iomem                    *virtbase;
    struct clk                      *clk;
    struct i2c_nmk_client           cli;
    u32 clk_freq;
    unsigned char                   tft;
    unsigned char                   rft;
    u32 timeout_usecs;
    enum i2c_freq_mode              sm;
    int stop;
    struct wait_queue_head          xfer_wq;
    bool xfer_done;
    int result;
    bool has_32b_bus;
 };

like, that's the whole cast of characters. main character energy all around 🎀

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💖 Members 💖

okay, field-by-field tour, bestie — no skipping, every single one matters:

• vendor — vendor data for this variant. like, which flavour of this controller we're dealing with 🍓
• adev — the parent amba device. it's the parent, it's giving authority 😌
• adap — the corresponding I2C adapter. the whole point, honestly.
• irq — interrupt line for the controller. the ✨ interruptions ✨
• virtbase — virtual io memory area. virtual, not fake, don't come for me.
• clk — the hardware i2c block clock. tick tock 🕰️
• cli — holder of client specific data. client's lil purse, if you will 🫶
• clk_freq — clock frequency for the operation mode.
• tft — Tx FIFO Threshold in bytes.
• rft — Rx FIFO Threshold in bytes.
• timeout_usecs — Slave response timeout. wait for it… wait for it… 💀
• sm — speed mode.
• stop — stop condition.
• xfer_wq — xfer done wait queue.
• xfer_done — xfer done boolean. true/false era 🌈
• result — controller propogated result. (that's their spelling, not mine, but I'm keeping it verbatim fr fr 🙈)
• has_32b_bus — controller is on a bus that only supports 32-bit accesses. yes, only 32-bit. that's the vibe check and it passed 👑

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🔥 SEE ALSO 🔥

everything's in the kernel file ./drivers/i2c/busses/i2c-nomadik.c — go read it, it's iconic:

• struct i2c_vendor_data(9)
• struct i2c_nmk_client(9)
• flush_i2c_fifo(9)
• disable_all_interrupts(9)
• clear_all_interrupts(9)
• init_hw(9)
• load_i2c_mcr_reg(9)
• setup_i2c_controller(9)
• read_i2c(9)
• write_i2c(9)
• nmk_i2c_xfer_one(9)
• nmk_i2c_xfer(9)
• disable_interrupts(9)
• i2c_irq_handler(9)

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bestie, that's the whole struct. nothing skipped, nothing merged, everything exactly where it lives. iykyk 💜

and that's a wrap! this one lives in ./drivers/i2c/busses, dated October 2026, and it's filed under struct nmk_i2c_dev(9) — mwah, slay, periodt ✨🎀🦋