ENUM GPIOD_FLAGS(9)

💅 enum gpiod_flags(9) — the Kernel API Manual, but make it make sense 🎀

okay bestie, so this is a page straight outta the Kernel API Manual (yes, the kernel, we're in the big leagues now ✨) and it's about one very specific little enum. it's enum gpiod_flags, and its whole entire job is to be the options bag you hand over when you call one of the gpiod_* functions — it tells the kernel which direction the GPIO lines should go and what value they should drive. that's it, that's the vibe 💅

✨ NAME ✨

enum gpiod_flags — optional flags you can pass to one of the gpiod_* functions to configure direction and output value.

🚨 real talk: these values cannot be OR'd. like, at all. no smashing them together, no | chaos. one flag, one vibe, periodt. 💀

🌸 SYNOPSIS 🌸

enum gpiod_flags {
    GPIOD_ASIS ,
    GPIOD_IN ,
    GPIOD_OUT_LOW ,
    GPIOD_OUT_HIGH ,
    GPIOD_OUT_LOW_OPEN_DRAIN ,
    GPIOD_OUT_HIGH_OPEN_DRAIN

};

look at that list, six little icons, all of them different, none of them combinable 🫶

🦋 Constants 🦋

• GPIOD_ASIS — don't touch a thing. don't change anything. leave the lines exactly as you found them, main character energy of the "no thoughts, head empty" variety 🙈
• GPIOD_IN — set the lines to input mode. they're listening now 👂
• GPIOD_OUT_LOW — set the lines to output and drive them low. pushing a low signal out into the world 🌈
• GPIOD_OUT_HIGH — set the lines to output and drive them high. same deal, but high. iconic ⭐
• GPIOD_OUT_LOW_OPEN_DRAIN — set the lines to open-drain output and drive them low. fancy output mode, low value, slay 💅
• GPIOD_OUT_HIGH_OPEN_DRAIN — set the lines to open-drain output and drive them high. fancy output mode, high value, also slay 👑

💖 SEE ALSO 💖

• Kernel file ./include/linux/gpio/consumer.h — the lore, the source of truth 🧚
• struct gpio_descs(9) — the struct bestie
• devm_fwnode_gpiod_get_optional(9) — the other function bestie

k that's the whole page, no notes, it's giving short and sweet 🍓 and before you go — this came from the Kernel API Manual, source ./include/linux/gpio, dated October 2026. mwah, go configure some lines responsibly 🔥👑