STRUCT XGPIO_INSTANCE(9)

📦 version 7.3.1, in nixpkgs unstable

💖 struct xgpio_instance(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ this one is literally the struct that holds everything we know about a GPIO device, and honestly? it's giving "main character energy" for the whole Xilinx GPIO driver 🌸

🎀 NAME 🎀

struct xgpio_instance — stores information about GPIO device 💅

✨ SYNOPSIS ✨

like, here's the whole vibe, character for character:

struct xgpio_instance {
    struct gpio_chip gc;
    void __iomem *regs;
    unsigned long map[BITS_TO_LONGS( 64)];
    unsigned long state[BITS_TO_LONGS( 64)];
    unsigned long last_irq_read[BITS_TO_LONGS( 64)];
    unsigned long dir[BITS_TO_LONGS( 64)];
    raw_spinlock_t gpio_lock;
    int irq;
    unsigned long enable[BITS_TO_LONGS( 64)];
    unsigned long rising_edge[BITS_TO_LONGS( 64)];
    unsigned long falling_edge[BITS_TO_LONGS( 64)];
    struct clk *clk;
 };

no cap, that's the whole struct 👑

🌈 Members 🌈

okay so let's go through the members one by one, because each one is kinda iconic in its own way:

  • gc — the GPIO chip 🫶
  • regs — the register block
  • map — GPIO pin mapping on the hardware side 🗺️
  • state — the GPIO write state shadow register
  • last_irq_read — the GPIO read state register from the last interrupt 😭 (yes the description is on its own line in the original, we're keeping that energy)
  • dir — the GPIO direction shadow register 🧭
  • gpio_lock — the lock used for synchronization 🔒 (do not sleep on this one, it's a raw_spinlock_t)
  • irq — the IRQ used by the GPIO device
  • enable — GPIO IRQ enable/disable bitfield ⭐
  • rising_edge — GPIO IRQ rising edge enable/disable bitfield 📈
  • falling_edge — GPIO IRQ falling edge enable/disable bitfield 📉
  • clk — the clock resource for this driver 🕰️

🦋 SEE ALSO 🦋

kernel file ./drivers/gpio/gpio-xilinx.c — and yes, the whole squad is linked:

okay that's the whole page, bestie 💜 one last thing — the source lives at ./drivers/gpio, dated October 2026, and this is struct xgpio_instance(9). slay, go read some kernel code, iykyk 🧚💖🎀

📦 where this page comes from