devm_backlig...ice_register(9)

💖 devm_backlight_device_register — Kernel API Manual 💖

okay so bestie, you're looking at devm_backlig...ice_register(9) and honestly? the manual name got truncated by the terminal, iconic behavior, but the vibe is clear: we're in the Kernel API Manual and we're about to register a backlight device. let's go 🎀

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✨ NAME ✨

devm_backlight_device_register — literally registers a new backlight device. that's the whole job. main character energy only 🌟

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🦋 SYNOPSIS 🦋

struct backlight_device * devm_backlight_device_register (struct device
*dev , const char *name , struct device *parent , void *devdata , const
struct backlight_ops *ops , const struct backlight_properties *props );

six arguments. no cap. she's a lot but she's worth it 💅

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🌸 ARGUMENTS 🌸

• dev — the device you're registering. the actual one. 🫶
• name — the name of the device, as a string. name her something cute.
• parent — a pointer to the parent device, and lowkey it's often the same as dev, so don't overthink it 🙈
• devdata — an optional pointer you get to stash stuff in for private driver use. optional!! like a little secret pocket 💜
• ops — the backlight operations structure. the struct backlight_ops. the moves. 🔥
• props — the backlight properties. struct backlight_properties. read on, bestie 👇

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⭐ DESCRIPTION ⭐

creates and registers a new backlight device. two things, one function, multitasking queen 👑

the important bit: when a backlight device is registered, the configuration must be specified in the props parameter. must. not optional, not "if you feel like it", it's required, periodt ✋ see the description of backlight_properties for what goes in there.

and then — and yes, this is chilling right here in DESCRIPTION, that's just where it lives, don't @ me — the return situation is:

struct backlight on success, or an ERR_PTR on error 💀

so check that pointer, bestie. ERR_PTR is not your friend if you ignore it 😭

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🌈 SEE ALSO 🌈

• the kernel file ./drivers/video/backlight/backlight.c
• overview(9)
• backlight_force_update(9)
• backlight_device_get_by_name(9)
• devm_backlight_device_unregister(9) — the matching cleanup, she's on the list too 🧹
• of_find_backlight_by_node(9)
• devm_of_find_backlight(9)

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reminder bestie: everything above is straight from the manual, i didn't add a single flag or behavior. if it's not listed here, it's not in there. iykyk 🦋

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and that's the page!! come from ./drivers/video/backlight, dated October 2026, and the footer still says devm_backlig...ice_register(9) because the truncation is forever iconic 💀✨ byeee, go read backlight_properties before you call this fr fr 💖