of_reset_co...al_exclusive(9)

💅 NAME 💅

okay so bestie, this is of_reset_control_get_optional_exclusive — say that five times fast, i dare you — and what it does is look up a reset controller and get an optional, exclusive reference to it. that's the whole vibe. lowkey iconic. 💖

(this page lives in the Kernel API Manual, section 9, which is the linux kernel's own little corner of man-page heaven. welcome. 🫶)

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✨ SYNOPSIS ✨

struct reset_control * of_reset_control_get_optional_exclusive (struct
device_node *node , const char *id );

like… that's the whole signature. the struct reset_control * is the main character, the two args are the supporting cast. 🎬

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🎀 ARGUMENTS 🎀

• node — the device that's gonna get reset by the controller. that's your lil guy. your target. 🎯
• id — the name of the reset line. the label on the door, iykyk.

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🦋 DESCRIPTION 🦋

so this is the optional variant of of_reset_control_get_exclusive, and that's the entire tea. 💁‍♀️

the optional-ness is huge actually: if the reset you're asking for isn't even specified in the device tree, this function does not throw a tantrum and hand you an error — it just returns NULL instead. no drama. very demure. 🌸

not the same as an error! NULL means "not there, cool, moving on." an error is a whole different thing, so read the next bit carefully bestie.

it returns a struct reset_control or an IS_ERR condition containing errno. so like, check it. don't just raw-dog the return value. 😭

also, using id names is optional. yes the optionality is optional too. it's optional-ception over here. ✨

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🌈 SEE ALSO 🌈

kernel file: ./include/linux/reset.h — that's where struct reset_control_bulk_data(9) and enum reset_control_flags(9) live, and honestly the whole friend group is listed below so let's get into it, no cap. this is the entire reset-control extended universe, and yes i'm listing every single one because they all ate. 🔥

• struct reset_control_bulk_data(9)
• enum reset_control_flags(9)
• reset_control_get_exclusive(9)
• reset_control_bulk_get_exclusive(9)
• reset_control_get_exclusive_released(9)
• reset_control_bulk_get_exclusive_released(9)
• reset_control_bulk_get_optional_exclusive_released(9)
• reset_control_get_shared(9)
• reset_control_bulk_get_shared(9)
• reset_control_get_optional_exclusive(9)
• reset_control_bulk_get_optional_exclusive(9)
• reset_control_get_optional_shared(9)
• reset_control_bulk_get_optional_shared(9)
• of_reset_control_get_exclusive(9)
• of_reset_control_get_shared(9)
• of_reset_control_get_exclusive_by_index(9)
• of_reset_control_get_shared_by_index(9)
• devm_reset_control_get_exclusive(9)
• devm_reset_control_get_exclusive_deasserted(9)
• devm_reset_control_bulk_get_exclusive(9)
• devm_reset_control_get_exclusive_released(9)
• devm_reset_control_bulk_get_exclusive_released(9)
• devm_reset_control_get_optional_exclusive_released(9)
• devm_reset_control_bulk_get_optional_exclusive_released(9)
• devm_reset_control_get_shared(9)
• devm_reset_control_get_shared_deasserted(9)
• devm_reset_control_bulk_get_shared(9)
• devm_reset_control_bulk_get_shared_deasserted(9)
• devm_reset_control_get_optional_exclusive(9)
• devm_reset_control_get_optional_exclusive_deasserted(9)
• devm_reset_control_bulk_get_optional_exclusive(9)
• devm_reset_control_get_optional_shared(9)
• devm_reset_control_get_optional_shared_deasserted(9)
• devm_reset_control_bulk_get_optional_shared(9)
• devm_reset_control_get_exclusive_by_index(9)
• devm_reset_control_get_shared_by_index(9)

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k that's the whole page bestie, go reset something responsibly 💜

source: ./include/linux · October 2026 · of_reset_co...al_exclusive(9) — mwah, signing off, drink some water and don't forget to check your IS_ERR 💅🎀🦋