devm_gpio_request_one(9)

💅 devm_gpio_request_one(9) — from the Kernel API Manual, bestie 🫶

okay so this one's a legacy little guy from the Kernel API Manual, and yes it's still documented, and yes you still need to know what it does. buckle up 🎀

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✨ NAME ✨

devm_gpio_request_one — request a single GPIO with initial setup ⚡

like, one (1) GPIO. singular. with the setup already handled for you. slay.

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🦋 SYNOPSIS 🦋

int devm_gpio_request_one (struct device *dev , unsigned gpio , unsigned
long flags , const char *label );

literally that's the whole signature, copy it exactly please, no improvising 💅

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🌸 ARGUMENTS 🌸

• dev — the device you're requesting this for, bestie. it's giving "who is this for" energy.
• gpio — the GPIO number. just the number. don't overthink it 🧚
• flags — GPIO configuration, as specified by GPIOF_*. the asterisk matters, iykyk ⭐
• label — a literal description string of this GPIO. like, an actual string. so the humans can read it later 😭

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💀 DESCRIPTION 💀

DEPRECATED — This function is deprecated and must not be used in new code.

not me having to say this but fr fr: don't use this in anything new. it's deprecated, full stop. it's still here, it still works, but it is not the main character anymore 🙈

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🌈 RETURN 🌈

• 0 on success 💖
• negative errno on failure 😭

that's it. that's the vibe check.

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👑 SEE ALSO 👑

• Kernel file ./drivers/gpio/gpiolib-legacy.c — note the "legacy" in the name, that's not a coincidence 💀
• gpio_request_one(9)

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and that's the page, bestie! sourced straight from ./drivers/gpio, dated October 2026 — stay deprecated-adjacent and keep your errnos negative, love u 💜🦋✨