pinctrl_gpio...ection_input(9)

💅 pinctrl_gpio_direction_input 💅

okay so welcome to the Kernel API Manual, bestie ✨ the header/footer on this page spells it pinctrl_gpio...ection_input(9) — yes, with the little truncation moment — and the function we're actually here for is pinctrl_gpio_direction_input. it's giving “one tiny pin-control helper, very serious rules” energy, and we're gonna cover every detail fr fr.

🌸 NAME 🌸

pinctrl_gpio_direction_input — request a GPIO pin to go into input mode. like, you're asking the pin to listen instead of yell, and honestly? iconic.

🦋 SYNOPSIS 🦋

int pinctrl_gpio_direction_input (struct gpio_chip *gc , unsigned int
offset );

🎀 ARGUMENTS 🎀

• gc — the GPIO chip structure from the GPIO subsystem. this is the controller-level struct, the main character of the GPIO situation.
• offset — the hardware offset of the GPIO relative to the controller. it's the pin's exact spot inside that controller, lowkey important.

✨ DESCRIPTION ✨

So here's the vibe check: this function should ONLY be used from gpiolib-based GPIO drivers, as part of their gpio_direction_input semantics. that's the whole lane. platforms and individual drivers shall NOT touch pin control GPIO calls — not even a little, not even with a cute little side quest. it's a hard boundary, and we respect it periodt.

no cap: if you're not in a gpiolib-based GPIO driver doing its gpio_direction_input thing, this is not your function to call. the manpage is very clear, and the caps lock is doing a lot of emotional labor.

🔥 SEE ALSO 🔥

Kernel file: ./drivers/pinctrl/core.c

all the see-also besties, in their exact little line-up 🫶:

• pinctrl_provide_dummies(9)
• get_pinctrl_dev_from_devname(9)
• pin_get_from_name(9)
• pin_get_name(9)
• gpio_to_pin(9)
• pinctrl_match_gpio_range(9)
• pinctrl_ready_for_gpio_range(9)
• pinctrl_get_device_gpio_range(9)
• pinctrl_add_gpio_range(9)
• pinctrl_find_gpio_range_from_pin(9)
• pinctrl_remove_gpio_range(9)
• pinctrl_generic_get_group_count(9)
• pinctrl_generic_get_group_name(9)
• pinctrl_generic_get_group_pins(9)
• pinctrl_generic_get_group(9)
• pinctrl_generic_add_group(9)
• pinctrl_generic_remove_group(9)
• pinctrl_generic_free_groups(9)
• pinctrl_get_group_selector(9)
• pinctrl_gpio_request(9)
• pinctrl_gpio_free(9)
• pinctrl_gpio_direction_output(9)
• pinctrl_gpio_set_config(9)
• pinctrl_gpio_get_config(9)
• pinctrl_get(9)
• pinctrl_release(9)
• pinctrl_put(9)
• pinctrl_lookup_state(9)
• pinctrl_commit_state(9)
• pinctrl_select_state(9)
• devm_pinctrl_get(9)
• devm_pinctrl_put(9)
• pinctrl_register_mappings(9)
• pinctrl_unregister_mappings(9)
• devm_pinctrl_register_mappings(9)
• pinctrl_force_sleep(9)
• pinctrl_force_default(9)
• pinctrl_init_done(9)
• pinctrl_select_default_state(9)
• pinctrl_pm_select_default_state(9)
• pinctrl_pm_select_init_state(9)
• pinctrl_pm_select_sleep_state(9)
• pinctrl_pm_select_idle_state(9)
• pinctrl_init_controller(9)
• pinctrl_register(9)
• pinctrl_register_and_init(9)
• pinctrl_unregister(9)
• devm_pinctrl_register(9)
• devm_pinctrl_register_and_init(9)

okay that's the whole page, bestie 🫶 source path is ./drivers/pinctrl, the date is October 2026, and the page name in the footer is pinctrl_gpio...ection_input(9). mwah 💋✨