devm_therma...ice_register(9)

📦 version 7.3.1, in nixpkgs unstable

💅 devm_thermal_of_child_cooling_device_register(9) 💅

okay bestie, so this is a page from the Kernel API Manual, section 9 — and it's literally the glow-up guide for registering an OF thermal cooling device. no cap. let's get into it 🫶

✨ NAME ✨

devm_thermal_of_child_cooling_device_register — register an OF thermal cooling device. that's it, that's the whole vibe. 🎀

🌸 SYNOPSIS 🌸

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

like, five arguments, one iconic function. she's a little wordy but she serves 💅

🦋 ARGUMENTS 🦋

  • dev — a valid struct device pointer of a sensor device. homegirl has to be legit, okay? don't be passing her nonsense.
  • np — a pointer to a device tree node. yes, that kind of node. 🌳
  • type — the thermal cooling device type. it's giving "what kind of cooler are we today" energy.
  • devdata — device private data. her own lil personal stash, iykyk 🙈
  • ops — standard thermal cooling devices callbacks. the whole personality of the device lives here, fr fr.

🔥 DESCRIPTION 🔥

okay so. this function will register a cooling device with a device tree node reference. main character behavior honestly 👑

this interface function adds a new thermal cooling device (fan/processor/...) to the /sys/class/thermal/ folder as cooling_device[0-*]. and the way that she tries to bind herself to all the thermal zone devices registered at the same time?? obsessed. multi-tasking queen. ✨

this function should be used when a cooling controller has child nodes which are referenced in the thermal zone cooling map. like, that's the whole situation she's built for. if that's your setup, she's your girl. 🫶

💀 RETURN 💀

a pointer to the created struct thermal_cooling_device or an ERR_PTR. so basically she comes back with either a beautiful new device or a dramatic error wrapped up all cute. 😭

⚠️ caller must check the return value with IS_ERR*() helpers. do NOT skip the vibe check. if you skip it, that's on you bestie, and the kernel will humble you. 💅

🌈 SEE ALSO 🌈

kernel file ./drivers/thermal/thermal_of.c plus her whole friend group:

go read the whole squad, no excuses 📚✨

and that's the tea 🍓 — brought to you by ./drivers/thermal, dated October 2026, page devm_therma...ice_register(9). mwah, love u, read ur manpages 💖🎀🦋

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