gpiod_direction_output(9)

💅 gpiod_direction_output(9) — Kernel API Manual, bestie edition ✨

Okay so this is from the Kernel API Manual, and it's literally about setting a GPIO's direction to output. Main character energy for pins. 🎀

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🌸 NAME 🌸

gpiod_direction_output — set the GPIO direction to output. 💅

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💅 SYNOPSIS 💅

Here's the call, bestie:

int gpiod_direction_output (struct gpio_desc *desc , int value );

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🦋 ARGUMENTS 🦋

• desc — the GPIO you're setting to output. 🦋
• value — the initial output value of the GPIO. 🍓

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✨ DESCRIPTION ✨

Okay so this function sets the direction of the passed GPIO to output, so that stuff like gpiod_set_value can be called safely on it. No cap, that's the whole serve. ✨

The initial value of the output must be specified as the logical value of the GPIO — i.e. you have to take its ACTIVE_LOW status into account, bestie. Do not skip that part 💅

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🫶 RETURN 🫶

• 0 on success, or a negative errno on failure. Slay when it's zero 🫶

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🌈 SEE ALSO 🌈

Kernel file: ./drivers/gpio/gpiolib.c — the source bestie. 👑

Then the whole friend group:

• 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_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_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) 🎀

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xoxo, from the source/version ./drivers/gpio, dated October 2026 💖🫶