power_off(9)

💜 power_off(9) — the kernel API manual is giving main character energy today

okay so welcome to the Kernel API Manual, bestie 💅 this is the page for power_off(9) and it's literally about shutting devices down, which is lowkey the most underrated glow-down in the whole kernel. let's get into it ✨

🎀 NAME 🎀

power_off — power off the devices in the OVL adaptor 🫶

🌸 SYNOPSIS 🌸

void power_off (struct device *dev , int num );

that's it, that's the whole signature. short, sweet, iconic 👑

🦋 DESCRIPTION 🦋

so what does it do? it calls the .power_off ovl_adaptor component callback if it is present — and ngl that "if it is present" is doing a lot of work, because if the callback isn't there, nothing happens. no cap, that's the whole behaviour. no hidden side quests, no surprise lore 💀

quick vibe check: the callback only fires when it actually exists on the ovl_adaptor component, so don't go assuming it always runs something 🙈

✨ ARGUMENTS ✨

• dev — the device to be powered off 💤 she's the one getting the nap
• num — the number of devices to be powered off 🔢 like, how many of them are we putting to sleep

💖 SEE ALSO 💖

• Kernel file ./drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c — the literal source, go read her, she's serving 🍓
• mtk_ovl_adaptor_power_on(9) — the opposite energy, the powering-on sibling, the duo fr fr 🌈

and that's the whole page, bestie 🧚 this entry lives in ./drivers/gpu/drm/mediatek and it's dated October 2026, so like… future-coded queen behavior ⭐ mwah, go power something off responsibly 💜