STRUCT STM32_DFSDM_DEV_DATA(9)

💖 NAME

struct stm32_dfsdm_dev_data — the DFSDM compatible configuration data struct, aka the little info packet that tells the driver what hardware it's actually dealing with 🎀

(this is from the Kernel API Manual btw, iykyk)

✨ SYNOPSIS

struct stm32_dfsdm_dev_data {
    u32 ipid;
    unsigned int num_filters;
    unsigned int num_channels;
    const struct regmap_config *regmap_cfg;
 };

🌸 Members

okay bestie, here's the whole cast of this struct — every single one, no skips 💅

• ipid — the DFSDM identification number 🔥 heads up tho: this one is only used if the hardware actually provides identification registers. no registers? then it's just sitting there looking cute.
• num_filters — how many filters the DFSDM has 🧚 and lowkey, this is unused if identification registers are available. it's giving backup dancer energy.
• num_channels — how many channels the DFSDM has 🌈 same deal: unused if identification registers are available. the register-having hardware just handles it itself, periodt.
• regmap_cfg — pointer to the SAI register map configuration ✨ yep, it literally says SAI in the description, we're not questioning it, we're just reporting it.

ngl the pattern here is real: ipid, num_filters and num_channels are all the "only if hardware gives you identification registers" crew, and regmap_cfg is the one always doing its job 🫶

🦋 SEE ALSO

• Kernel file ./drivers/iio/adc/stm32-dfsdm-core.c — go read it, it's the main character 👑
• stm32_dfsdm_start_dfsdm(9)
• stm32_dfsdm_stop_dfsdm(9)

and that's the whole page, bestie 💜 sourced from ./drivers/iio/adc, dated October 2026 — struct stm32_dfsdm_dev_data(9), slay, no cap, bye 🎀✨