gpiod_export(9)

🌸 NAME 🌸

gpiod_export — export a GPIO through sysfs, and yes bestie, this is from the Kernel API Manual 💅✨

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✨ SYNOPSIS ✨

int gpiod_export (struct gpio_desc *desc , bool direction_may_change );

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🎀 ARGUMENTS 🎀

• desc — the GPIO you're making available; it's already requested, okay? 👀
• direction_may_change — true if userspace may change GPIO direction 🦋

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🦋 CONTEXT 🦋

This one is valid from arch_initcall or later — that's the window, bestie ⏰✨

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💖 DESCRIPTION 💖

So when drivers want to make a GPIO accessible to userspace after they've requested it — maybe for debugging, maybe as part of their public interface — they may use this routine. 🫶

If the GPIO can change direction (some literally can't) and the caller allows it, userspace will see a "direction" sysfs attribute, and that attribute may be used to change the gpio's direction. A "value" attribute will always be provided. No cap. ✨

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🔥 RETURN 🔥

0 on success, or a negative errno on failure. That's it, that's the whole vibe 😌

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpio/gpiolib-sysfs.c
• gpiod_export_link(9)
• gpiod_unexport(9)

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Signed, sealed, delivered by ./drivers/gpio — October 2026 edition 💖🎀