STRUCT MPU3050(9)

💖 struct mpu3050(9) 💖

okay bestie, welcome to the Kernel API Manual — yes it's a whole manual, and yes this page is about struct mpu3050, which is the instance state container for the device. that's the whole vibe: it's the lil bucket where one MPU-3050 keeps all its state. 🫶

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✨ NAME ✨

struct mpu3050 — literally just the instance state container for the device. that's it, that's the name, she's a container and she's serving 💅

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🌸 SYNOPSIS 🌸

struct mpu3050 {
    struct device *dev;
    struct iio_mount_matrix orientation;
    struct regmap *map;
    struct mutex lock;
    int irq;
    struct regulator_bulk_data regs[2];
    enum mpu3050_fullscale fullscale;
    enum mpu3050_lpf lpf;
    u8 divisor;
    s16 calibration[3];
    struct iio_trigger *trig;
    bool hw_irq_trigger;
    bool irq_actl;
    bool irq_latch;
    bool irq_opendrain;
    bool pending_fifo_footer;
    s64 hw_timestamp;
    struct i2c_mux_core *i2cmux;
 };

look at her. every field accounted for. no notes. 👑

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🎀 Members 🎀

okay so here's the member-by-member breakdown, and ngl it's kinda the main character section of this whole page:

• dev — the parent device for this instance. the origin story, if you will.
• orientation — the mounting matrix, flipped axis etc. it's giving "your sensor is sideways and we respect that."
• map — the regmap to reach the registers. the lil translator between you and the hardware's inner monologue.
• lock — the serialization lock to marshal all requests. one at a time babes, we queue 😌
• irq — the IRQ used for this device.
• regs — the regulators to power this device. gotta feed her 💖
• fullscale — the current fullscale setting for the device.
• lpf — the digital low pass filter setting for the device.
• divisor — the base frequency divider: it divides 8 or 1 kHz.
• calibration — the three signed 16-bit calibration settings that get written into the offset registers for each axis to compensate for DC offsets. three of them. signed. 16-bit. doing the math so you don't have to ✨
• trig — the trigger for the MPU-3050 interrupt, if present. if present — she's optional, she's mysterious.
• hw_irq_trigger — hardware interrupt trigger is in use.
• irq_actl — interrupt is active low.
• irq_latch — latched IRQ, this means that it is a level IRQ. important detail, don't skip it.
• irq_opendrain — the interrupt line shall be configured open drain.
• pending_fifo_footer — tells us if there is a pending footer in the FIFO that we have to read out first when handling the FIFO. read the footer first, bestie, order matters 🫡
• hw_timestamp — the latest hardware timestamp from the trigger IRQ, when in use.
• i2cmux — an I2C mux reflecting the fact that this sensor is a hub with a pass-through I2C interface coming out of it: this device needs to be powered up in order to reach devices on the other side of this mux. no power, no pass-through, no devices. periodt. ⚡

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🦋 SEE ALSO 🦋

go read the Kernel file ./drivers/iio/gyro/mpu3050.h, and also enum mpu3050_fullscale(9) and enum mpu3050_lpf(9) — the enum girlies are right there and they're iconic, iykyk 💜

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fr fr that's the whole page. nothing skipped, nothing invented, all facts intact. mwah 🍓

and that's a wrap on this one — brought to you by the source in ./drivers/iio/gyro, dated October 2026, which is honestly so far away and yet here we are 💀✨