gpiod_enable...timestamp_ns(9)

✨ gpiod_enable...timestamp_ns(9) ✨

okay so bestie, welcome to the Kernel API Manual — yes that's the manual name, we're in the big leagues now 💅 this one's all about gpiod_enable_hw_timestamp_ns, which is a whole vibe: it turns on hardware timestamping, measured in nanoseconds. iconic behavior honestly 🕰️✨

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🌸 NAME 🌸

gpiod_enable_hw_timestamp_ns — Enable hardware timestamp in nanoseconds.

no cap, that's literally what it does. hardware. timestamps. nanoseconds. slay 🎀

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🦋 SYNOPSIS 🦋

int gpiod_enable_hw_timestamp_ns (struct gpio_desc *desc , unsigned long
flags );

that's the whole signature, copy it exactly bestie, don't be out here renaming things 🙈

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💖 ARGUMENTS 💖

• desc — GPIO to enable. like, the actual line you want to get timestamping on 🎯
• flags — Flags related to GPIO edge. the edge of the signal is the moment we care about, and these flags speak to that ⚡

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👑 RETURN 👑

0 on success, or a negative errno on failure. so like — zero is the good ending, negative numbers are the group chat saying "it didn't work" 😭

fr fr, always check the return value. negative errno is not a drill.

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🌈 SEE ALSO 🌈

the way this list is long — it's giving "everyone in the GPIO group chat got invited to the party" 🫶 keep the whole squad intact:

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_direction_output(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)

also the kernel file it lives near: ./drivers/gpio/gpiolib.c — that's the source, iykyk 🧚

lowkey the sibling function is gpiod_disable_hw_timestamp_ns(9) up there in the list, so if you ever need to turn it back off… you already know where to look 💀 no extra info, i'm just pointing respectfully.

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that's the whole page, bestie 💜 — this one's from the ./drivers/gpio source, October 2026, and it's page gpiod_enable...timestamp_ns(9) of the Kernel API Manual. go timestamp something, and remember: nanoseconds are tiny but your impact is not 🌟