STRUCT ALPS_DEV(9)

✨ struct alps_dev(9) ✨

okay bestie, so this is a page from the Kernel API Manual and it's literally all about struct alps_dev — the struct that holds everything the ALPS driver needs to know about your touchpad 🎀 no cap, and the NAME line is empty in the original so like… the name is just the struct itself, iykyk 💅

🌸 SYNOPSIS 🌸

here's the whole thing verbatim, don't touch a single character bestie:

struct alps_dev {
    struct input_dev *input;
    struct input_dev *input2;
    struct hid_device *hdev;
    enum dev_num dev_type;
    u8 max_fingers;
    u8 has_sp;
    u8 sp_btn_info;
    u32 x_active_len_mm;
    u32 y_active_len_mm;
    u32 x_max;
    u32 y_max;
    u32 x_min;
    u32 y_min;
    u32 btn_cnt;
    u32 sp_btn_cnt;
 };

💖 Members 💖

the main character energy of this struct is all in the members, so let's go through every single one 🫶

• input — pointer to the kernel input device ✨
• input2 — pointer to the kernel input2 device ✨ (yes there's a second one, she's got range)
• hdev — pointer to the struct hid_device 🔥
• dev_type — device type 🦋
• max_fingers — total number of fingers, like the whole squad 👑
• has_sp — boolean of sp existense 🫧 (that's spelled exactly like that in the original, keep it iconic)
• sp_btn_info — button information 🎀
• x_active_len_mm — active area length of X (mm) 📏
• y_active_len_mm — active area length of Y (mm) 📏
• x_max — maximum x coordinate value ⭐
• y_max — maximum y coordinate value ⭐
• x_min — minimum x coordinate value 🌈
• y_min — minimum y coordinate value 🌈
• btn_cnt — number of buttons 💅
• sp_btn_cnt — number of stick buttons 💅

👀 SEE ALSO 👀

if you wanna read the actual source (and honestly, why wouldn't you), go check out the kernel file:

• ./drivers/hid/hid-alps.c

and that's the whole vibe bestie, go forth and slay those touchpad structs 💜

this masterpiece comes from ./drivers/hid, dated October 2026 — fr fr, the struct alps_dev(9) era is upon us 🧚‍♀️✨