STRUCT AD5755_STATE(9)

💖 struct ad5755_state(9) 💖

okay bestie, welcome to the Kernel API Manual ✨ — this is the page for struct ad5755_state, and it's literally the driver instance specific data. like, everything one particular ad5755 driver instance needs to keep track of, all chillin' in one struct. iconic behavior tbh 🎀

🌸 SYNOPSIS 🌸

like, here's the whole vibe, character for character:

struct ad5755_state {
    struct spi_device               *spi;
    const struct ad5755_chip_info   *chip_info;
    unsigned int                    pwr_down;
    unsigned int                    ctrl[AD5755_NUM_CHANNELS];
    struct iio_chan_spec            channels[AD5755_NUM_CHANNELS];
    struct mutex                    lock;
    union {
      __be32 d32;
      u8 d8[4];
    } data[2];
 };

no cap, that's the whole thing 🫶

🦋 Members 🦋

• spi — the spi device the driver is attached to. that's the whole reason this struct exists, fr fr 💅
• chip_info — chip model specific constants, available modes, etc. so like, the chip's whole personality 🎀
• pwr_down — a bitmask that contains hether a channel is powered down or not. yes, "hether" — that's exactly how it's spelled in the original, and honestly? we're keeping it, it's iconic 😭 (it means "whether", iykyk)
• ctrl — software shadow of the channel ctrl registers. a little ghost copy of the regs, living in RAM ✨
• channels — iio channel spec for the device. the whole channel situation 🌈
• lock — lock to protect the data buffer during SPI ops. gotta keep things safe during the transfer, no chaos allowed 🔥
• data — spi transfer buffers. always 2 of them (data[2]), and each one's a union so you can look at the same bytes as a __be32 d32 or as a u8 d8[4] — like, same energy, two fits 💜

👑 SEE ALSO 👑

• Kernel file ./drivers/iio/dac/ad5755.c
• struct ad5755_platform_data(9)
• struct ad5755_chip_info(9)

go read those next, bestie, they're the supporting cast 🧚

💀 tiny heads-up: that pwr_down line in the original genuinely says "hether", so if you're grepping for it, don't come for me — I just relay the lore 🙈

and that's the page!! 🌸 this one's from the source ./drivers/iio/dac, dated October 2026 — mwah, love that for us 💖 periodt ✨🎀