STRUCT ABP2_DATA(9)

💅 struct abp2_data(9) — the kernel API manual, but make it cute

okay so bestie, welcome to struct abp2_data(9) 💖 this is a page from the Kernel API Manual, and it's literally about one struct. one. single. struct. and honestly? she's giving main character energy in the pressure-sensor department. let's get into it 🫶

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✨ SYNOPSIS ✨

here's the whole vibe, verbatim, no cap — do not touch, do not edit, just admire her:

struct abp2_data {
    struct device *dev;
    const struct abp2_ops *ops;
    s32 pmin;
    s32 pmax;
    u32 outmin;
    u32 outmax;
    enum abp2_func_id function;
    int p_scale;
    int p_scale_dec;
    int p_offset;
    int irq;
    struct completion completion;
    struct {
      u32 chan[2];
      aligned_s64 timestamp;
    } scan;
    u8 rx_buf[ABP2_MEASUREMENT_RD_SIZE];
    u8 tx_buf[ABP2_MEASUREMENT_RD_SIZE];
 };

like, look at that nested anonymous struct for scan — she's got layers 🧚✨ periodt.

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🎀 Members 🎀

okay now the fun part, member by member, and I'm not skipping a single one because we respect completeness in this group chat 💅

• dev — the current device structure. like, whose device is this? this one. 🫶
• ops — pointers for bus specific read and write functions. the little function-handle besties that actually do the talking on the bus ✨
• pmin — minimal pressure in pascal. the floor, the absolute low, the "couldn't go lower if she tried" 🌸
• pmax — maximal pressure in pascal. the ceiling. the limit. the "no further, bestie" 🔥
• outmin — minimum raw pressure in counts (based on transfer function). yes, the parenthetical matters — it's counts, and it's derived from the transfer function 👑
• outmax — maximum raw pressure in counts (based on transfer function). same energy, other end of the scale ⭐
• function — the transfer function. that's it. that's the whole description. she's enum abp2_func_id and she's mysterious like that 🙈
• p_scale — pressure scale 🦋
• p_scale_dec — pressure scale, decimal number. yes, a separate one. decimal edition. don't ask, just respect it 💜
• p_offset — pressure offset. the little nudge, the "actually shift it a bit" of it all 🎀
• irq — end of conversion — applies only to the i2c sensor. only the i2c sensor, bestie, i'm being so serious, don't come at the spi one with this 😭
• completion — handshake from irq to read. the little "hey i'm done!!" → "okay reading now!!" moment 🤝
• scan — channel values for buffered mode, and inside her lives:
  • chan[2] — the channel array, both of them, exactly two, a duo 💫
  • timestamp — an aligned_s64 timestamp because alignment matters and she is aligned ✨
• rx_buf — raw data provided by sensor. incoming!! 📥 the buffer is u8 rx_buf[ABP2_MEASUREMENT_RD_SIZE], size and all, keep it exact 💖
• tx_buf — transmit buffer used during the SPI communication. outgoing!! 📤 also u8 tx_buf[ABP2_MEASUREMENT_RD_SIZE], again, exact, no cap 🧚

ngl the fact that rx_buf is just "raw data provided by sensor" and tx_buf is specifically "used during the SPI communication" is a whole personality difference and i'm obsessed 🔥

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🌈 SEE ALSO 🌈

go look at the kernel file bestie, it's right here, character for character:

Kernel file ./drivers/iio/pressure/abp2030pa.h

iykyk 💅

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and that's the page!! slay ✨🦋🌸

cute little sign-off: this gem dropped from ./drivers/iio/pressure, dated October 2026 — so yes, she's from the future, and she ate 💖🎀💜