STRUCT MESON_I2C(9)

✨ struct meson_i2c(9) ✨

okay so bestie, this page is straight out of the Kernel API Manual and it's literally the whole personality of the Meson I2C driver's private data 🎀 yes, private — this is the little struct where the driver keeps all its business, and we're gonna go through every single field because we do not skip anything in this house 💅

Think of it as the driver's group chat: adapter, device, regs, clocks, messages, state machine, locks, the whole vibe. Let's get into it 🦋

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💖 NAME 💖

struct meson_i2c — the Meson I2C device's private data, aka where the driver stores its own stuff 🌸

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🌈 SYNOPSIS 🌈

struct meson_i2c {
    struct i2c_adapter      adap;
    struct device           *dev;
    void __iomem            *regs;
    struct clk              *clk;
    struct i2c_msg          *msg;
    int state;
    bool last;
    int count;
    int pos;
    int error;
    spinlock_t lock;
    struct completion       done;
    u32 tokens[2];
    int num_tokens;
    const struct meson_i2c_data *data;
 };

no cap, that's the whole struct, copied exactly, every field in order 😌

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🎀 Members 🎀

• adap — the I2C adapter instance 🫶 the actual adapter this driver is out here representing
• dev — pointer to the device structure, the device's own little backstage pass
• regs — base address of the device's memory-mapped registers, i.e. where the magic gets poked ✨
• clk — pointer to the clock structure ⏰ gotta keep that clock in check
• msg — pointer to the current I2C message, the one on deck right now
• state — the current state in the driver's state machine 🔄 main character energy, honestly
• last — flag set for the last message in the transfer 🏁 the finale flag
• count — number of bytes to be sent/received in the current transfer, aka the byte tally
• pos — current position in the send/receive buffer 📍 we know exactly where we are
• error — flag set when an error is received 😭 yes it happens, and yes we flag it
• lock — there to avoid race conditions between the irq handler and the xfer code 🔒 no cutting in line, periodt
• done — completion used to wait for transfer termination ⏳ "tell me when you're done bestie"
• tokens — sequence of tokens to be written to the device 🎟️🎟️ literally an array of two: u32 tokens[2]
• num_tokens — number of tokens, the token headcount
• data — pointer to the controller's platform data 🧚 the controller's own lore

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👑 SEE ALSO 👑

• Kernel file ./drivers/i2c/busses/i2c-meson.c — go read the source, iykyk 💜

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fr fr, if you're touching this struct you're already deep in the Meson I2C driver, so respect the lock and respect the error flag 🙈

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and that's the whole page, bestie 💖 this was ./drivers/i2c/busses, October 2026 — slay, go forth and read the kernel source 🌟