STRUCT AD5761_STATE(9)

💅 struct ad5761_state(9) 💅

okay so this is a page straight out of the kernel API manual, and it's literally the blueprint for one driver instance's whole personality — its per-chip data bag. bestie, this struct is the main character of ad5761.c and it holds everything the driver needs to remember about the DAC it's currently babysitting. no cap.

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✨ NAME ✨

struct ad5761_state — driver instance specific data 🎀

like, it's the little state blob that says "this particular chip, right here, here's what's up with it." periodt.

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🌸 SYNOPSIS 🌸

struct ad5761_state {
    struct spi_device               *spi;
    struct mutex                    lock;
    bool use_intref;
    int vref;
    enum ad5761_voltage_range range;
    union {
      __be32 d32;
      u8 d8[4];
    } data[3];
 };

look at her. iconic. she's got a pointer, a mutex, a couple of flags and numbers, a range enum, and a lil' union array of three. the vibes are immaculate 💖

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🦋 Members 🦋

• spi — a spi_device 🫶 literally the SPI device this whole state belongs to. the whole reason we're here.
• lock — a struct mutex, and its whole job is to protect the data buffer during SPI ops 🔒 like, don't let two threads touch the buffer at the same time, that's not the vibe. it's giving safety.
• use_intref — a bool, and it's true when the internal voltage reference is used ✨ (as in, yes we're using the chip's own reference, not an external one, tyvm).
• vref — an int holding the actual voltage reference in mVolts ⚡ so like, the real number, in millivolts. remember the units, bestie, they matter.
• range — an enum ad5761_voltage_range, aka the output range mode used 📏 it tells you which output range the thing is configured for.
• data — the cache aligned spi buffer 🧚 that's the union { __be32 d32; u8 d8[4]; } data[3] up there — three of them, cache aligned, ready to be shoved down the SPI wire.

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👑 SEE ALSO 👑

• Kernel file ./drivers/iio/dac/ad5761.c 📄
• struct ad5761_chip_info(9) 💜

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⚠️ friendly reminder: lock exists for a reason — it protects the data buffer during SPI ops. don't be the one who skips it, i'm literally begging 😭

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and that's the whole page, fr fr — sourced from ./drivers/iio/dac, dated October 2026, in the kernel API manual. mwah, stan this struct for clear skin 💅🌈⭐