STRUCT ADC_JACK_DATA(9)

💅 struct adc_jack_data(9) — the Kernel API Manual, bestie edition

okay so this is from the kernel API manual, and today we're doing a deep dive on struct adc_jack_data — literally the internal data for the adc_jack device driver. it's giving "backstage pass to the extcon-adc-jack situation" and honestly? obsessed. 🎀

✨ SYNOPSIS ✨

struct adc_jack_data {
    struct device *dev;
    struct extcon_dev *edev;
    const unsigned int **cable_names;
    struct adc_jack_cond *adc_conditions;
    int num_conditions;
    int irq;
    unsigned long handling_delay;
    struct delayed_work handler;
    struct iio_channel *chan;
    bool wakeup_source;
 };

yes bestie, that trailing space before the closing brace is canon, we don't touch it 💖 — copy it exactly, no cap.

🌸 Members 🌸

• dev — the struct device that's associated with the adc_jack. it's the main character of the device world, lowkey.
• edev — the extcon device. yep. that's the whole description, she's mysterious like that 🦋.
• cable_names — the list of supported cables. not one cable, not two — the whole list, periodt.
• adc_conditions — the list of adc value conditions. iykyk 🔥
• num_conditions — the size of adc_conditions. she's just here to tell you how many of them there are, and honestly she ate 💅
• irq — the irq number of the attach/detach event. and listen — it's 0 if it doesn't exist. so if you see a zero, she's not there, don't come for her 🙈
• handling_delay — the interrupt handler will schedule extcon event handling at handling_delay jiffies. so it's a delayed situation, it waits, it's got main character energy but she's patient ⭐
• handler — the extcon event handler, called by the interrupt handler. it's giving "called by the interrupt handler" and that's literally the entire vibe 🧚
• chan — the iio channel being queried. that's it. that's the whole thing. she's a queried channel and we respect her 💜
• wakeup_source — indicates if the device can wake up the system. like a bool that decides if the system gets to sleep in or not 😭

lowkey reminder: every one of these members is exactly as written above — don't go renaming wakeup_source to something cuter, that's NOT the move, the compiler will not be slaying with you 💀

👑 SEE ALSO 👑

• Kernel file ./drivers/extcon/extcon-adc-jack.c — go read it, bestie, it's right there 🌈

and that's the page!! fr fr, go be iconic with your adc_jack driver 🫶✨

source/version: ./drivers/extcon • date: October 2026 — mwah, signed off with love, struct adc_jack_data(9) 🍓💖