ENUM EINT_TYPE(9)

💅 enum eint_type — a whole vibe check on external interrupt types

okay bestie, so this page is from the Kernel API Manual, manual section 9 (kernel API stuff, iykyk) ✨ and it's literally all about enum eint_type — the possible external interrupt types. it's giving "small enum, big responsibilities" 🎀

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✨ SYNOPSIS ✨

like, here's the whole thing, and yes every constant matters:

enum eint_type {
    EINT_TYPE_NONE ,
    EINT_TYPE_GPIO ,
    EINT_TYPE_WKUP ,
    EINT_TYPE_WKUP_MUX

};

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🌸 Constants 🌸

four constants, no more no less, let's go:

• EINT_TYPE_NONE — this bank literally does not support external interrupts at all. not a single one. it's giving "i'm just here for the vibes" 😭
• EINT_TYPE_GPIO — this bank supports external gpio interrupts 🦋
• EINT_TYPE_WKUP — this bank supports external wakeup interrupts 💜
• EINT_TYPE_WKUP_MUX — this bank supports multiplexed external wakeup interrupts ✨ (yes, multiplexed, we love a mux moment)

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👑 Description 👑

so here's the lore 🫶 the Samsung GPIO controller groups all the available pins into banks. and the pins in a pin bank can support:

• external gpio interrupts, or
• external wakeup interrupts, or
• no interrupts at all

periodt. that's the whole menu 🍓

and from a software perspective, the only difference between external gpio interrupts and external wakeup interrupts is that wakeup interrupts can additionally wake up the system if it's in a suspended state 🔥 like, that's it, that's the flex.

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🦋 SEE ALSO 🦋

go read the kernel file ./drivers/pinctrl/samsung/pinctrl-samsung.h — it's the main character of this whole saga 📖 and then check out its friends:

• enum pincfg_type(9)
• struct samsung_pin_bank_type(9)
• struct samsung_pin_bank_data(9)
• struct samsung_pin_bank(9)
• struct samsung_retention_data(9)
• struct samsung_pin_ctrl(9)
• struct samsung_pinctrl_drv_data(9)
• struct samsung_pinctrl_of_match_data(9)
• struct samsung_pin_group(9)
• struct samsung_pmx_func(9)

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ngl bestie, if you're poking at pin banks and interrupts, read the whole list. iykyk 💅

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and that's the tea ☕ this page lives in ./drivers/pinctrl/samsung and the doc itself is dated October 2026 — slay, see you in the future 💖🧚🌈