STRUCT IT87_GPIO(9)

💅 struct it87_gpio(9) — the it87-specific GPIO chip, explained

okay so bestie, welcome to the Kernel API Manual ✨ this page is literally about struct it87_gpio, which is — say it with me — the it87-specific GPIO chip. that's the whole NAME section, no cap 🫶

✨ SYNOPSIS ✨

here's the whole vibe, character for character, don't touch anything:

struct it87_gpio {
    struct gpio_chip chip;
    spinlock_t lock;
    u16 io_base;
    u16 io_size;
    u8 output_base;
    u8 simple_base;
    u8 simple_size;
 };

🎀 Members 🎀

each field is kind of a main character in its own right, so let's do a little roll call 💖

• chip — the underlying gpio_chip structure. the foundation, the blueprint, the whole reason we're here 👑
• lock — a lock to avoid races between operations. she's the bouncer at the club, keeping concurrent stuff from bumping into each other 🚫💀
• io_base — base address for gpio ports. the starting point, the origin story 🌸
• io_size — size of the port rage starting from io_base. (yes, the manpage says "rage" — iconic typo, we keep it, we love it 😭🔥 and yeah it means the port range.)
• output_base — Super I/O register address for the Output Enable register. that's where the "can this line actually output??" info lives 🦋
• simple_base — Super I/O 'Simple I/O' Enable register. lowercase simple, capital I/O, we stan a specific naming convention 💅
• simple_size — Super IO 'Simple I/O' Enable register size. and bestie, this one is required, fr fr: it's needed because IT87xx chips might only provide Simple I/O switches on a subset of lines, whereas the others keep the same status all time. so like, not every line gets a switch, and the ones that don't just stay the same forever. iykyk 🧚⭐

🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpio/gpio-it87.c — go read it, it's giving source of truth 📖✨

and that's the page, bestie! this lil slice of the docs lives under ./drivers/gpio and it's dated October 2026 — so mark your calendar, stay hydrated, and go poke some GPIO pins responsibly 💜🎀🫶