STRUCT FF_CONDITION_EFFECT(9)

💅 struct ff_condition_effect(9) — the Kernel API Manual, but make it cute 🎀

okay so bestie, welcome to the struct ff_condition_effect(9) page — this is the little struct that defines a spring or friction force-feedback effect. yes, like an actual physical spring, in your kernel, no cap. 🌀

---

✨ NAME ✨

struct ff_condition_effect — literally defines a spring or friction force-feedback effect. that's it, that's the whole vibe. 🫶

---

🌸 SYNOPSIS 🌸

here's the struct, bestie — copy it exactly, don't freestyle:

struct ff_condition_effect {
    __u16 right_saturation;
    __u16 left_saturation;
    __s16 right_coeff;
    __s16 left_coeff;
    __u16 deadband;
    __s16 center;
 };

---

🦋 Members 🦋

okay so let's go through the members one by one, because each one is doing its own little job and we're gonna respect it 💖

• right_saturation — the maximum level when the joystick is moved all the way to the right. it's giving "how hard can this go on the right side" energy. 👑
• left_saturation — same for the left side. equality, periodt. ✨
• right_coeff — controls how fast the force grows when the joystick moves to the right. so like, how aggressively the spring fights back. 🔥
• left_coeff — same for the left side. symmetric slay. 💅
• deadband — size of the dead zone, where no force is produced. quiet zone. nothing happening there. peace and love. 🕊️
• center — position of the dead zone. like, where exactly that no-force zone sits. 🎯

---

👀 SEE ALSO 👀

Kernel file ./include/uapi/linux/input.h — and a whole friend group of structs and ioctls that you should absolutely go read next, iykyk:

• struct input_absinfo(9)
• struct input_keymap_entry(9)
• EVIOCGMTSLOTS(9)
• EVIOCGMASK(9)
• EVIOCSMASK(9)
• struct ff_replay(9)
• struct ff_trigger(9)
• struct ff_envelope(9)
• struct ff_constant_effect(9)
• struct ff_ramp_effect(9)
• struct ff_periodic_effect(9)
• struct ff_rumble_effect(9)
• struct ff_haptic_effect(9)
• struct ff_effect(9)

---

fr fr, this page lives in ./include/uapi/linux and it's dated October 2026 — so take the struct ff_condition_effect(9) knowledge and go make something rumble. 💜

okay that's the whole page bestie, ily, go touch some force-feedback 🌈