devm_thermal...ice_register(9)

💅 devm_thermal_cooling_device_register(9) — like, the whole lore

okay bestie, so this page lives in the Kernel API Manual, and it's literally all about devm_thermal_cooling_device_register — yes that's a mouthful, we're gonna get through it together 🫶

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✨ NAME ✨

devm_thermal_cooling_device_register — register a thermal cooling device. that's it, that's the vibe check 💖

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🌸 SYNOPSIS 🌸

struct thermal_cooling_device * devm_thermal_cooling_device_register
(struct device *dev , const char *type , void *devdata , const struct
thermal_cooling_device_ops *ops );

no cap, that's the whole signature. four arguments, zero drama (okay maybe a lil drama, keep reading) 🦋

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🎀 ARGUMENTS 🎀

• dev — a valid struct device pointer of a sensor device. like, it has to be valid fr fr, don't be out here passing garbage 🙈
• type — the thermal cooling device type. this is the label bestie 💅
• devdata — device private data. your personal little stash 🌸
• ops — standard thermal cooling devices callbacks. the actual behavior lives here ⭐

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🔥 DESCRIPTION 🔥

so this function will register a cooling device. iconic behavior honestly 👑

this interface function adds a new thermal cooling device (fan/processor/...) to /sys/class/thermal/ folder as cooling_device[0-*]. yes, with a bracket-star and everything, it's giving index energy 😭

and then — the main character move — it tries to bind itself to all the thermal zone devices registered at the same time. not one, not two, all of them. periodt 💀

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💜 RETURN 💜

it returns a pointer to the created struct thermal_cooling_device, or an ERR_PTR.

⚠️ bestie listen to me: caller must check return value with IS_ERR*() helpers. do not skip this. this is the one rule 🙏

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/thermal/thermal_core.c
• bind_previous_governor(9)
• thermal_set_governor(9)
• thermal_bind_cdev_to_trip(9)
• thermal_unbind_cdev_from_trip(9)
• thermal_cooling_device_register(9)
• thermal_cooling_device_update(9)
• thermal_cooling_device_unregister(9)
• thermal_zone_device_register_with_trips(9)
• thermal_zone_device_unregister(9)
• thermal_zone_get_zone_by_name(9)

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and that's the page, bestie 🧚💖 quick sign-off so you have the receipts: this one's sourced from ./drivers/thermal, dated October 2026, and it's filed under devm_thermal...ice_register(9) — the truncated name is literally how it ships, don't @ me 😭✨

slay, go register some cooling devices responsibly 🍓👑