bl_get_data(9)

💜 bl_get_data(9) — like, the Kernel API Manual, section 9 bestie ✨

okay so real talk, this is a page straight out of the Kernel API Manual, section 9, and it's short but it eats. let's get into it 🫶

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✨ NAME ✨

bl_get_data — access devdata 💅

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🎀 SYNOPSIS 🎀

void * bl_get_data (struct backlight_device *bl_dev );

that's it. that's the whole vibe check. one function, one argument, returns a void *. no cap. 🦋

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🌸 ARGUMENTS 🌸

• bl_dev — pointer to backlight device. literally just a pointer to the backlight device, she's not complicated 🎀

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💖 DESCRIPTION 💖

okay so here's the tea 🍓: when a backlight device is registered, the driver has the possibility to supply a void * devdata. and bl_get_data returns a pointer to that devdata. that's the whole plot. main character energy fr fr 💅

more specifically (and i want you to clock this, bestie): it returns the pointer to devdata stored while registering the backlight device. so whatever you stashed away at registration time? this is how you get it back. iconic. 👑

lowkey important: the return is a void *, so you are the one who knows what's actually in there. no cap, don't come crying to me if you cast it wrong 🙈

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🔥 SEE ALSO 🔥

• Kernel file ./include/linux/backlight.h — the header where all the backlight lore lives 📁
• enum backlight_update_reason(9)
• enum backlight_type(9)
• struct backlight_ops(9)
• struct backlight_properties(9)
• struct backlight_device(9)
• backlight_update_status(9)
• backlight_enable(9)
• backlight_disable(9)
• backlight_is_blank(9)
• backlight_get_brightness(9)

like, the whole backlight friend group honestly 🌈✨

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and that's the page!! shoutout to ./include/linux for being the source, to October 2026 for the timestamp (futuristic queen ⭐), and to bl_get_data(9) herself for keeping it cute and short 💖 mwah, go read the other backlight pages, ily, bye 🧚💜