gpiochip_find_base_unlocked(9)

💅 gpiochip_find_base_unlocked — a vibe check on the kernel API manual ✨

okay so bestie, welcome to gpiochip_find_base_unlocked(9) from the Kernel API Manual — yes the whole title is the function name, we're not being subtle today 🎀 she's a kernel function, she's documented in ./drivers/gpio, and she has exactly one job. let's get into it 🦋

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✨ NAME ✨

gpiochip_find_base_unlocked — find a global GPIO number base 🔢

like, that's it. that's the whole name. she finds the base. iconic behavior honestly 👑

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🌸 SYNOPSIS 🌸

int gpiochip_find_base_unlocked (u16 ngpio );

one arg, u16, returns an int. short and sweet. main character energy fr fr 💖

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🎀 ARGUMENTS 🎀

• ngpio — the number of consecutive GPIOs you want numbered 🧮 like, how many in a row, bestie. that's the whole parameter. no notes.

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💜 DESCRIPTION 💜

so what she actually does: she finds and allocates a consecutive range of unsigned integers that represent the GPIOs on the system. basically she goes looking for a nice empty stretch of numbers and claims it for the gpios 🫶 lowkey a real estate agent for integers.

⚠️ now the part you actually need to hear: using this numberspace outside of gpiolib's internals is STRONGLY DISCOURAGED. I'm not being dramatic, the manpage literally yells it at you in all caps. drivers and consumers should NOT concern themselves with this numberspace. periodt. 💅

like, stay in your lane, stay out of the global numberspace, let gpiolib handle her own business 🙈 this is an internal-facing function, iykyk.

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🦋 SEE ALSO 🦋

okay this list is long and honestly a little iconic — like she brought her whole friend group 😭 here's everyone:

gpio_to_desc(9), gpio_device_get_desc(9), desc_to_gpio(9), gpiod_hwgpio(9), gpiod_to_chip(9), gpiod_to_gpio_device(9), gpio_device_get_base(9), gpio_device_get_label(9), gpio_device_get_chip(9), gpiod_is_equal(9), gpiod_get_direction(9), gpiod_is_single_ended(9), gpiochip_query_valid_mask(9), gpiochip_get_data(9), gpiochip_remove(9), gpio_device_find(9), gpio_device_find_by_label(9), gpio_device_find_by_fwnode(9), gpio_device_get(9), gpio_device_put(9), gpio_device_to_device(9), gpiochip_set_hierarchical_irqchip(9), gpiochip_irq_domain_activate(9), gpiochip_irq_domain_deactivate(9), gpiochip_irq_map(9), gpiochip_add_irqchip(9), gpiochip_irqchip_remove(9), gpiochip_irqchip_add_domain(9), gpiochip_generic_request(9), gpiochip_generic_free(9), gpiochip_generic_config(9), gpiochip_add_pingroup_range(9), gpiochip_add_pin_range_with_pins(9), gpiochip_remove_pin_ranges(9), gpiochip_dup_line_label(9), gpiochip_request_own_desc(9), gpiochip_free_own_desc(9), gpio_set_debounce_timeout(9), gpiod_direction_input(9), gpiod_direction_output_raw(9), gpiod_direction_output(9), gpiod_enable_hw_timestamp_ns(9), gpiod_disable_hw_timestamp_ns(9), gpiod_set_config(9), gpiod_set_debounce(9), gpiod_set_transitory(9), gpiod_is_active_low(9), gpiod_toggle_active_low(9), gpiod_get_raw_value(9), gpiod_get_value(9), gpiod_get_raw_array_value(9), gpiod_get_array_value(9), gpiod_set_raw_value(9), gpiod_set_value_nocheck(9), gpiod_set_value(9), gpiod_set_raw_array_value(9), gpiod_set_array_value(9), gpiod_cansleep(9), gpiod_set_consumer_name(9), gpiod_is_shared(9), gpiod_to_irq(9), gpiochip_lock_as_irq(9), gpiochip_unlock_as_irq(9), gpiod_get_raw_value_cansleep(9), gpiod_get_value_cansleep(9), gpiod_get_raw_array_value_cansleep(9), gpiod_get_array_value_cansleep(9), gpiod_set_raw_value_cansleep(9), gpiod_set_value_cansleep(9), gpiod_set_raw_array_value_cansleep(9), gpiod_add_lookup_tables(9), gpiod_set_array_value_cansleep(9), gpiod_add_lookup_table(9), gpiod_remove_lookup_table(9), fwnode_gpiod_get_index(9), gpiod_count(9), gpiod_get(9), gpiod_get_optional(9), gpiod_configure_flags(9), gpiod_get_index(9), gpiod_get_index_optional(9), gpiod_hog(9), gpiochip_free_hogs(9), gpiod_get_array(9), gpiod_get_array_optional(9), gpiod_put(9), gpiod_put_array(9) 🔥

and yeah — there's a kernel file note too: ./drivers/gpio/gpiolib.c 🧚 that's where she lives, go say hi.

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and that's the page, bestie!! 🌈 source file ./drivers/gpio, dated October 2026, manual page gpiochip_find_base_unlocked(9) — mwah, go read the kernel source, ily, bye 💖⭐💅