ENUM GPIO_V2_LINE_FLAG(9)

💫 enum gpio_v2_line_flag(9) 💫

okay bestie, welcome to the kernel API manual page for enum gpio_v2_line_flag(9) — yes that's a whole lotta name and yes it slays 🎀

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✨ NAME ✨

enum gpio_v2_line_flag — the actual values you shove into &struct gpio_v2_line_attribute.flags. that's it, that's the whole gig 💅

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🌸 SYNOPSIS 🌸

here's the whole lineup, no cap, every single one:

enum gpio_v2_line_flag {
    GPIO_V2_LINE_FLAG_USED ,
    GPIO_V2_LINE_FLAG_ACTIVE_LOW ,
    GPIO_V2_LINE_FLAG_INPUT ,
    GPIO_V2_LINE_FLAG_OUTPUT ,
    GPIO_V2_LINE_FLAG_EDGE_RISING ,
    GPIO_V2_LINE_FLAG_EDGE_FALLING ,
    GPIO_V2_LINE_FLAG_OPEN_DRAIN ,
    GPIO_V2_LINE_FLAG_OPEN_SOURCE ,
    GPIO_V2_LINE_FLAG_BIAS_PULL_UP ,
    GPIO_V2_LINE_FLAG_BIAS_PULL_DOWN ,
    GPIO_V2_LINE_FLAG_BIAS_DISABLED ,
    GPIO_V2_LINE_FLAG_EVENT_CLOCK_REALTIME ,
    GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE

};

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🦋 Constants 🦋

okay so now we meet the cast, one icon at a time 🌈

• GPIO_V2_LINE_FLAG_USED — this line is not available for request. taken. spoken for. busy. respectfully, back off 🙈
• GPIO_V2_LINE_FLAG_ACTIVE_LOW — the line's active state is physical low. flip the vibe, lowkey means on 💀
• GPIO_V2_LINE_FLAG_INPUT — the line is an input. it's listening, bestie 👂
• GPIO_V2_LINE_FLAG_OUTPUT — the line is an output. it's the one doing the talking 🗣️
• GPIO_V2_LINE_FLAG_EDGE_RISING — the line detects rising edges, meaning inactive to active. going up, up, up ⬆️✨
• GPIO_V2_LINE_FLAG_EDGE_FALLING — the line detects falling edges, meaning active to inactive. and down it goes 😭
• GPIO_V2_LINE_FLAG_OPEN_DRAIN — the line is an open drain output. fancy ✨
• GPIO_V2_LINE_FLAG_OPEN_SOURCE — the line is an open source output. also fancy, different flavor 🍓
• GPIO_V2_LINE_FLAG_BIAS_PULL_UP — the line has pull-up bias enabled 🎈
• GPIO_V2_LINE_FLAG_BIAS_PULL_DOWN — the line has pull-down bias enabled 🧲
• GPIO_V2_LINE_FLAG_BIAS_DISABLED — the line has bias disabled. no bias here, we stan a neutral icon 👑
• GPIO_V2_LINE_FLAG_EVENT_CLOCK_REALTIME — line events contain REALTIME timestamps ⏰
• GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE — line events contain timestamps from the hardware timestamping engine (HTE) subsystem 🔥

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👀 SEE ALSO 👀

go read the whole friend group, they're all in the kernel file ./include/uapi/linux/gpio.h:

• struct gpiochip_info(9)
• struct gpio_v2_line_values(9)
• enum gpio_v2_line_attr_id(9)
• struct gpio_v2_line_attribute(9)
• struct gpio_v2_line_config_attribute(9)
• struct gpio_v2_line_config(9)
• struct gpio_v2_line_request(9)
• struct gpio_v2_line_info(9)
• enum gpio_v2_line_changed_type(9)
• struct gpio_v2_line_info_changed(9)
• enum gpio_v2_line_event_id(9)
• struct gpio_v2_line_event(9)
• struct gpioline_info(9)
• struct gpioline_info_changed(9)
• struct gpiohandle_request(9)
• struct gpiohandle_config(9)
• struct gpiohandle_data(9)
• struct gpioevent_request(9)
• struct gpioevent_data(9)

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💖 that's the whole page bestie, every flag accounted for, nothing skipped, fr fr

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and that's a wrap! this iconic little page lives in ./include/uapi/linux, dated October 2026, and it's filed under enum gpio_v2_line_flag(9) 🫶✨ bye cutie, go blink some LEDs responsibly 💜