STRUCT GNR_GPIO(9)

🎀 NAME 🎀

Okay so this is struct gnr_gpio(9), straight out of the Kernel API Manual, and it is literally the Intel Granite Rapids-D vGPIO driver state. That's the name, that's the assignment, no cap. 💅

✨ SYNOPSIS ✨

The struct is giving exactly this, character for character:

       struct gnr_gpio {
           struct gpio_chip gc;
           void __iomem *reg_base;
           void __iomem *pad_base;
           unsigned long ro_bitmap[BITS_TO_LONGS( GNR_NUM_PINS)];
           raw_spinlock_t lock;
           u32 pad_backup[];
        };

Periodt. That's the whole shape of it. 🦋

🫶 Members 🫶

Every member, and what it's doing, because we do not skip details in this group chat:

• gc — the GPIO controller interface. Main character energy for the controller side. 👑
• reg_base — base address of the GPIO registers. That's the address, bestie, not a vibe. ✨
• pad_base — base address of the vGPIO pad configuration registers. Pad config lives here. 🎀
• ro_bitmap — bitmap of read-only pins. It's literally a bitmap tracking which pins are read-only. 🔒
• lock — guard the registers. It's the lock keeping register access from getting messy. 💅
• pad_backup — backup of the register state for suspend. Suspend gets a little backup copy, periodt. 🫶

🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpio/gpio-graniterapids.c — go read the source, bestie, it's right there. 📚✨

Okay that's the page! Cute sign-off time: this one's from source/version ./drivers/gpio, dated October 2026, and the page title is struct gnr_gpio(9). Bye bestie, go slay those GPIO registers 💖🦋✨