STRUCT AD5446_STATE(9)

💅 NAME

struct ad5446_state — the driver-instance-specific data, aka the lil' data bundle that holds everything one particular driver instance needs to know about itself 🫶 (this is from the Kernel API Manual, bestie, so you know it's legit)

✨ SYNOPSIS

struct ad5446_state {
    struct device *dev;
    const struct ad5446_chip_info *chip_info;
    unsigned short vref_mv;
    unsigned int cached_val;
    unsigned int pwr_down_mode;
    unsigned int pwr_down;
    struct mutex lock;
    union {
      __be16 d16;
      u8 d24[3];
    };
 };

Like, look at her. She's got a pointer, a const pointer, a couple of unsigned short/unsigned int friends, a mutex, and an anonymous union just vibing at the bottom with no name. Main character energy, honestly 💅

🎀 Members

Okay so here's the breakdown of every single field, no skipping, we're doing this properly:

• dev — this device. Literally this one. The device we're talking about. Iconic. 🌸
• chip_info — the chip-model-specific constants, like the available modes and whatever else that particular chip model brings to the table. Think of it as the chip's personality sheet ✨
• vref_mv — the actual reference voltage used. Actual! As in, the real one in play, not some theoretical number.
• cached_val — stores/retrieves values during power down. She's holding onto your data while the device naps 😴
• pwr_down_mode — the power down mode, and the options are 1k, 100k, or tristate. Three whole choices. Pick your fighter 💀
• pwr_down — true if the device is in power down, false if it's up and living its life. Simple as that, no cap.
• lock — the lock that protects the data buffer during write ops. She's the bouncer. Nobody touches the buffer mid-write, periodt 🔥
• {unnamed_union} — anonymous. That's it. That's the whole description. The union has no name and honestly? Respect. 🧚 Inside it you've got __be16 d16; and u8 d24[3]; because sometimes you want the 16-bit big-endian view and sometimes you want three bytes, and she contains multitudes.

👑 SEE ALSO

• Kernel file ./drivers/iio/dac/ad5446.h
• struct ad5446_chip_info(9) — go read that one too, bestie, they're linked 💜

Alright that's the whole page, you ate that ngl 🍓

Source/version: ./drivers/iio/dac · dated October 2026 · and the page itself is struct ad5446_state(9) — mwah, bye bestie! 💖🎀🦋