gpiochip_irq_map(9)

🌈 gpiochip_irq_map(9) 🌈

okay so bestie, welcome to the gpiochip_irq_map(9) page in the Kernel API Manual. This is the lowkey mapping function that gets an IRQ line settled into a GPIO irqchip, and we are keeping every detail, no cap. 💖

✨ NAME ✨

gpiochip_irq_map — maps an IRQ into a GPIO irqchip. Periodt. 🎀

🌟 SYNOPSIS 🌟

int gpiochip_irq_map (struct irq_domain *d , unsigned int irq ,
       irq_hw_number_t hwirq );

🎀 ARGUMENTS 🎀

• d — the irqdomain used by this irqchip. That’s the domain, bestie. 🦋
• irq — the global irq number used by this GPIO irqchip irq. Global number, okay? 💅
• hwirq — the local IRQ/GPIO line offset on this gpiochip. Local line offset, iykyk. ✨

💅 DESCRIPTION 💅

The way this works: this function will set up the mapping for a certain IRQ line on a gpiochip by assigning the gpiochip as chip data, and using the irqchip stored inside the gpiochip. That’s the whole vibe. 🔥

🔥 RETURN 🔥

0 on success, or negative errno on failure. That’s it, no cap. 😭

🦋 SEE ALSO 🦋

Also peep the kernel file ./drivers/gpio/gpiolib.c, plus all these function pages, bestie:

• 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)
• gpiochip_find_base_unlocked(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_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)

cute little sign-off: source/version ./drivers/gpio, dated October 2026, and yes this is still gpiochip_irq_map(9) — mwah 💋🫶