pinmux_gene...tion_is_gpio(9)

💅 pinmux_gene...tion_is_gpio(9) — the Kernel API Manual, bestie edition 🎀

okay so this is a page from the Kernel API Manual, and honestly? It's a little one but she serves. We're talking pinmux_generic_function_is_gpio — yes the name is long, yes it ate, no we're not changing it. 💅

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✨ NAME ✨

pinmux_generic_function_is_gpio — returns true if given function is a GPIO 🫶

Like literally, that's the whole job. She checks a function and tells you if it's a GPIO. Iconic, no notes.

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🌸 SYNOPSIS 🌸

bool pinmux_generic_function_is_gpio (struct pinctrl_dev *pctldev ,
unsigned int selector );

Not me giving you two whole arguments to pass. Two. Count 'em. 🍓

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🦋 ARGUMENTS 🦋

• pctldev — the pin controller device 💖 (your main character device, fr)
• selector — the function number 🔢 (just the number of the function you're curious about, iykyk)

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⭐ RETURN ⭐

True if given function is a GPIO, false otherwise. 👑

That's it. That's the vibe check. true = she's a GPIO, false = she's not, and there's genuinely no in-between, periodt.

ngl bestie this one is a clean boolean — no weird sentinel values, no negative-error-code shenanigans hiding in there. Just true or false. We love a low-drama return value. 🧚

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🌈 SEE ALSO 🌈

okay this is the part where I hand you the whole friend group 👯‍♀️ — the Kernel file

./drivers/pinctrl/pinmux.c

and all her besties:

• pinmux_can_be_used_for_gpio(9)
• pin_request(9)
• pin_free(9)
• pinmux_request_gpio(9)
• pinmux_free_gpio(9)
• pinmux_gpio_direction(9)
• pinmux_generic_get_function_count(9)
• pinmux_generic_get_function_name(9)
• pinmux_generic_get_function_groups(9)
• pinmux_generic_get_function(9)
• pinmux_generic_add_function(9)
• pinmux_generic_add_pinfunction(9)
• pinmux_generic_remove_function(9)
• pinmux_generic_free_functions(9)

Like... the whole generic-function cinematic universe. You could literally read them all in one sitting. Obsessed. 🔥

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🎀 sign-off 🎀

That's the page, bestie! This little cutie lives in ./drivers/pinctrl, and the doc itself is dated October 2026 under the Kernel API Manual — and yes, the title up top got squished into pinmux_gene...tion_is_gpio(9) because even manpage headers have to truncate sometimes 😭. Go check your GPIOs, stay hydrated, and remember: true is a lifestyle. 💜✨🦋