__cpuidle_cooling_register(9)

✨ __cpuidle_cooling_register ✨

okay bestie, welcome to the Kernel API Manual entry for __cpuidle_cooling_register(9) — yes that's a double underscore, yes it's on purpose, and yes she is that girl 💅

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🎀 NAME 🎀

__cpuidle_cooling_register — register the cooling device 🧊✨

🌸 SYNOPSIS 🌸

int __cpuidle_cooling_register (struct device_node *np , struct
       cpuidle_driver *drv );

🦋 ARGUMENTS 🦋

• np — a device node structure pointer, and she's the one used for the thermal binding 🫶
• drv — a cpuidle driver structure pointer, iconic, no notes 💜

💖 DESCRIPTION 💖

so like, this function is in charge of a whole little to-do list and she does not skip a single item:

• allocating the cpuidle cooling device structure
• the idle injection
• initializing them
• registering the cooling device to the thermal framework 🔥

allocate, init, register, done. main character energy fr fr 👑

⭐ RETURN ⭐

• zero on success 🎉 (we love a zero)
• a negative value returned by one of the underlying subsystems in case of error 😭 — not her fault bestie, blame the subsystem, she's just the messenger

🌈 SEE ALSO 🌈

Kernel file ./drivers/thermal/cpuidle_cooling.c, plus this whole friend group:

• struct cpuidle_cooling_device(9)
• cpuidle_cooling_runtime(9)
• cpuidle_cooling_get_max_state(9)
• cpuidle_cooling_get_cur_state(9)
• cpuidle_cooling_set_cur_state(9)
• cpuidle_cooling_register(9)

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and that's the page 🫶 she lives in ./drivers/thermal, she's dated October 2026, and she answers to __cpuidle_cooling_register(9) — go read her siblings, iykyk 🦋💜