pinmux_gpio_direction(9)

💅 pinmux_gpio_direction — like, the kernel API manual edition 🎀

okay so bestie, welcome to pinmux_gpio_direction(9), the absolutely iconic little function that sets the direction of a single muxed-in GPIO pin ✨. That's it, that's the whole vibe. One pin. One direction. Main character energy only 🙈.

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✨ NAME ✨

pinmux_gpio_direction — set the direction of a single muxed-in GPIO pin 🦋

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🌸 SYNOPSIS 🌸

int pinmux_gpio_direction (struct pinctrl_dev *pctldev , struct
       pinctrl_gpio_range *range , unsigned int pin , bool input );

like, yes it returns an int, and yes she takes four args — we'll get to those 👑

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💖 ARGUMENTS 💖

• pctldev — the pin controller that's handling this pin, aka the queen in charge of the whole situation 👑
• range — the applicable GPIO range, iykyk, it's the little neighborhood our pin lives in 🏡
• pin — the affected GPIO pin in this controller, the actual star of the show ⭐
• input — true if we're setting the pin as input, false for output, no in-between, we don't do ambiguity here 💅

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/pinctrl/pinmux.c — literally the whole friend group lives here 🫶
• pinmux_can_be_used_for_gpio(9)
• pin_request(9)
• pin_free(9)
• pinmux_request_gpio(9)
• pinmux_free_gpio(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_function_is_gpio(9)
• pinmux_generic_add_function(9)
• pinmux_generic_add_pinfunction(9)
• pinmux_generic_remove_function(9)
• pinmux_generic_free_functions(9)

go read them, they ate 💀✨

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ngl, keep the whole pinctrl squad in your bookmarks — they're all lowkey obsessed with pins and honestly same 🌈

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and that's the page, bestie!! 💜 this little gem comes to you from ./drivers/pinctrl, dated October 2026, and it's filed under pinmux_gpio_direction(9) in case you ever need to find her again 🎀🦋💖 slay!!