__device_reset(9)

💅 __device_reset(9) — bestie edition

okay so real talk, this is a page from the Kernel API Manual, and honestly? it's a little guy. a tiny convenience wrapper. but it slays at doing exactly one thing, and we're gonna learn it together. 🫶

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✨ NAME ✨

__device_reset — the function that goes and finds the reset controller that belongs to your device and then, like, actually performs the reset. no cap. 🔥

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🌸 SYNOPSIS 🌸

int __device_reset (struct device *dev , bool optional );

like. that's it. that's the whole signature. baby steps bestie 💖

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🎀 ARGUMENTS 🎀

• dev — the actual device that's gonna get reset by the controller. this is the main character here 👑
• optional — a bool that decides whether resetting this device is optional or not. iykyk 🙈

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🦋 DESCRIPTION 🦋

okay so picture this: __device_reset is literally just a convenience wrapper for __reset_control_get and reset_control_reset. like, it's the l'il friend who does the two-step for you so you don't gotta. 💅

it's genuinely useful for the super common case of devices that have a single, dedicated reset line — the ones that are just, one reset, one line, no drama. one-device-one-reset-line energy ✨

and for devices with ACPI, the _RST firmware method will get called. yes, that's a thing. noted. 🌈

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🌟 SEE ALSO 🌟

bestie. sit down. it's a list. it's a long list. but every single one of these is iconic in its own right so let's give them their flowers 💐

• the kernel file ./drivers/reset/core.c — the lore, the origin story 📖
• struct reset_control(9)
• struct reset_control_array(9)
• struct reset_gpio_lookup(9)
• fwnode_reset_simple_xlate(9)
• reset_controller_register(9)
• reset_controller_unregister(9)
• devm_reset_controller_register(9)
• reset_control_reset(9)
• reset_control_bulk_reset(9)
• reset_control_rearm(9)
• reset_control_assert(9)
• reset_control_bulk_assert(9)
• reset_control_deassert(9)
• reset_control_bulk_deassert(9)
• reset_control_status(9)
• reset_control_acquire(9)
• reset_control_bulk_acquire(9)
• reset_control_release(9)
• reset_control_bulk_release(9)
• reset_control_put(9)
• reset_control_bulk_put(9)
• fwnode_reset_control_get_count(9)
• fwnode_reset_control_array_get(9)
• devm_reset_control_array_get(9)
• reset_control_get_count(9)

lowkey obsessed with how many of these there are. the bulk_ variants really said "we're a package deal" 😭🫶

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

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mwah 💋 this one came at you from ./drivers/reset in October 2026, straight out of the Kernel API Manual — catch you on the next page, bestie! ⭐🌸