STRUCT I8255_REGMAP_CONFIG(9)

💅 struct i8255_regmap_config(9) — the Kernel API Manual, bestie edition 🎀

okay so this is the Kernel API Manual page for struct i8255_regmap_config, and it's literally the configuration blueprint for the register map of an i8255. it's giving "backstage pass to the GPIO controller" energy, and honestly? iconic. let's get into it ✨

---

✨ NAME ✨

struct i8255_regmap_config — the config for the register map of an i8255, no cap 🫶

---

🌸 SYNOPSIS 🌸

struct i8255_regmap_config {
    struct device *parent;
    struct regmap *map;
    int num_ppi;
    const char *const *names;
    struct irq_domain *domain;
 };

that's the whole vibe right there, bestie. five members, zero fluff 👑

---

🦋 Members 🦋

• parent — the parent device, aka the one who brought you into this world 🫶
• map — the regmap for the i8255, like the group chat where all the register messages live 💬
• num_ppi — number of i8255 Programmable Peripheral Interface (yes that's what PPI stands for, and yes you should know it, iykyk) 🔢
• names — (optional) array of names for gpios. cute little name tags for your pins 🏷️
• domain — (optional) IRQ domain, but only if the controller is interrupt-capable. it's giving "main character energy if you've got the hardware for it" ⚡

---

💀 Note 💀

The regmap is expected to have cache enabled, and the i8255 control registers are not to be marked as volatile. this is not a suggestion, bestie — the regmap expects it, so set it up right or don't come crying to me 😭

---

🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpio/gpio-i8255.h — go read it, fr fr 📖

---

🎀 sign-off 🎀

this page lives in ./drivers/gpio, dated October 2026, and it's literally titled struct i8255_regmap_config(9) — that's the whole source, version and date situation, periodt. slay, go configure some registers, and stay hydrated 💖💅✨