STRUCT GPIO_MOUSE(9)

🦋 struct gpio_mouse(9) 🦋

okay bestie, welcome to the Kernel API Manual — we're doing struct gpio_mouse today and honestly? it's giving "small struct, big responsibility" ✨

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🌸 NAME 🌸

struct gpio_mouse — (that's it, that's the name, the original page literally leaves the description blank and honestly? iconic. no notes. 💅)

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✨ SYNOPSIS ✨

struct gpio_mouse {
    u32 scan_ms;
    struct gpio_desc *up;
    struct gpio_desc *down;
    struct gpio_desc *left;
    struct gpio_desc *right;
    struct gpio_desc *bleft;
    struct gpio_desc *bmiddle;
    struct gpio_desc *bright;
 };

like, look at her. seven pointers and a u32. she's perfect 🫶

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🎀 Members 🎀

so bestie, here's the roster, one by one, no skips:

• scan_ms — the scan interval in milliseconds. yes, the only member that isn't a pointer. she's the main character here ngl 👑
• up — GPIO line for the up value. ⬆️
• down — GPIO line for the down value. ⬇️
• left — GPIO line for the left value. ⬅️
• right — GPIO line for the right value. ➡️
• bleft — GPIO line for the left button. (the b is for button, iykyk 🖱️)
• bmiddle — GPIO line for the middle button. 🖱️
• bright — GPIO line for the right button. (and not "bright" like the light, it's b + right, don't let the name jump-scare you fr fr 😭)

vibe check: four of these are directions, three are buttons, and one is a millisecond number. memorize the difference and you're slaying.

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💜 Description 💜

so here's the tea ☕ — this struct must be added to the platform_device in the board code. like, not optional, not "if you feel like it", it must be there.

and what's it for? it's used by the gpio_mouse driver to do two things:

1. setup GPIO lines
2. calculate mouse movement

that's the whole job. she sets up the lines, she does the math on the movement, she goes home. periodt. 💅

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/input/mouse/gpio_mouse.c — go read the source, bestie, it's right there, it's free, it's educational 🌈

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and that's the whole page!! go forth and build your tiny GPIO mouse, you absolute icon 🧚💖

mwah 💋 — this little dispatch came to you from ./drivers/input/mouse, dated October 2026, and yes she's still serving struct gpio_mouse(9) realness. byeee 🎀✨