STRUCT IPAQ_MICRO(9)

🌸 NAME 🌸

struct ipaq_micro — the iPAQ microcontroller state, bestie 💖

So this is from the Kernel API Manual, which is literally the group chat for kernel devs, and today's main character is struct ipaq_micro. It's the state container for the iPAQ microcontroller, and yes it's giving "small struct, big responsibilities." 🎀

✨ SYNOPSIS ✨

struct ipaq_micro {
    struct device *dev;
    void __iomem *base;
    void __iomem *sdlc;
    char version[5];
    struct ipaq_micro_txdev tx;
    struct ipaq_micro_rxdev rx;
    spinlock_t lock;
    struct ipaq_micro_msg *msg;
    struct list_head queue;
    void (*key) (void *data, int len, unsigned char *rxdata);
    void *key_data;
    void (*ts) (void *data, int len, unsigned char *rxdata);
    void *ts_data;
 };

Like, that's the whole thing. Copy it exactly if you're writing code, ok? No cap. 🫶

💅 Members 💅

Ok so here's the member-by-member breakdown, and ngl every single one matters:

• dev — the corresponding platform device. That's its whole job 💁
• base — virtual memory base for the underlying serial device. Iconic memory-mapped realness ✨
• sdlc — virtual memory base for the Synchronous Data Link Controller. Yes it has its own base, it's that girl 🌈
• version — version string. Just char version[5], tiny but mighty 🍓
• tx — TX state. Sending vibes 📤
• rx — RX state. Receiving vibes 📥
• lock — lock for this state container. Protect the state at all costs, fr fr 🔒
• msg — current message. One at a time, bestie 💌
• queue — message queue. Where the messages line up and wait their turn 🎀
• key — callback for asynchronous key events. It literally goes void (*key) (void *data, int len, unsigned char *rxdata); 🎹
• key_data — data to pass along with key events. Ride-along data, obsessed 🧚
• ts — callback for asynchronous touchscreen events. Same signature energy: void (*ts) (void *data, int len, unsigned char *rxdata); 👆
• ts_data — data to pass along with key events. (Yes, that's what the original says — it's ts_data but the description mentions key events. Not me noticing that, but slay, we keep it as documented 💀)

🔥 SEE ALSO 🔥

• Kernel file ./include/linux/mfd/ipaq-micro.h
• struct ipaq_micro_txdev(9)
• struct ipaq_micro_rxdev(9)
• struct ipaq_micro_msg(9)

Go read those too, iykyk 👑

Lowkey a vibe check on the whole microcontroller: everything you need to know lives in ./include/linux/mfd/ipaq-micro.h and the friends listed above. No guessing, periodt. 💜

And that's the whole page, bestie — brought to you by the fine folks at ./include/linux/mfd, dated October 2026, and filed under struct ipaq_micro(9). Mwah 💋🌸