gpiod_is_shared(9)

📦 version 7.3.1, in nixpkgs unstable

💖 gpiod_is_shared(9) — like, the Kernel API Manual page, bestie 💖

okay so picture this: you're deep in the kernel, poking at GPIO descriptors, and you just NEED to know if this one little line can be grabbed by more than one consumer at the same time. that's literally this whole function. it's from the Kernel API Manual and it is the vibe check for GPIO sharing. 🦋

✨ NAME ✨

gpiod_is_shared — check if this GPIO can be shared by multiple consumers 💅

🌸 SYNOPSIS 🌸

bool gpiod_is_shared (const struct gpio_desc *desc );

🎀 ARGUMENTS 🎀

  • desc — the GPIO you wanna inspect, bestie. that's it. that's the whole argument. 👑

⭐ RETURN ⭐

  • True if this GPIO can be shared by multiple consumers at once. slay. 🔥
  • False if it's a regular, exclusive GPIO — like, it's taken, it's monogamous, no sharing. 💀

🌈 NOTE 🌈

okay this part is IMPORTANT so listen up 🙈

This function returning true does not mean that this GPIO is currently being shared. it means the GPIO core has registered the fact that the firmware configuration indicates that it can be shared by multiple consumers, and the core is in charge of arbitrating the access.

so it's giving "permission slip energy," not "currently in use energy." iykyk. 🧚

👑 SEE ALSO 👑

Kernel file ./drivers/gpio/gpiolib.c, plus literally the entire friend group:

not me reading ninety-something SEE ALSO entries in one sitting 😭 but fr fr they're all there, every single one, no cap. 🫶

and that's the whole page, bestie!! source file lives in ./drivers/gpio and it's dated October 2026 — so like, future iconic. go forth and check your GPIO sharing, you absolute main character. 💜💅🎀

📦 where this page comes from