dev_pm_genpd_is_on(9)

📦 version 7.3.1, in nixpkgs unstable

💖 dev_pm_genpd_is_on — bestie's guide to checking if a genpd is literally on 💖

okay so first things first, this is a page from the Kernel API Manual (yes, the actual kernel docs, we're being fancy today 👑) and it's all about one little function that tells you whether a device's generic power domain is awake or not. that's it. that's the whole vibe. ✨

✨ NAME ✨

dev_pm_genpd_is_on — gets the current power domain status of a device 🫶

like, "hey is this thing's power domain on rn or nah" — that's the entire job, no cap.

🦋 SYNOPSIS 🦋

bool dev_pm_genpd_is_on (struct device *dev );

it returns a bool (so: yes or no, true or false, on or off, slay or not-slay 💅) and it takes exactly one argument. keep reading, we'll get to it.

🌸 ARGUMENTS 🌸

  • dev — the device whose current power status you wanna know about 🎀 like, hand it the device and it'll tell you what's up

💜 DESCRIPTION 💜

okay so here's what's actually happening under the hood: this function checks whether the generic power domain associated with the given device is on or not. and the way it does that? it verifies if genpd_status_on equals GENPD_STATE_ON. that's the check. that's the whole thing. simple, iconic, does what it says on the tin ✨

ngl it's giving "one job and it does it well" energy and honestly? obsessed.

⚠️ NOTE ⚠️

okay bestie, this part is important, do NOT skip it 🙈

this function returns the power status of the genpd at the time of the call. but the power status may change after — because of activity from other devices sharing the same genpd. multiple devices, one genpd, chaos, you get it 💀

so like... this information should not be relied upon for long-term decisions about the device power state. it's a snapshot, not a promise. a vibe check, not a commitment. do not build your whole power-management strategy on it, fr fr 🫶

🎀 RETURN 🎀

so the original page... kind of leaves this one blank 😭 no documented return value to relay here, so we're not gonna make one up. the synopsis does say it's a bool — that's all the source gives us, and we're being honest about it. 💀

🔥 SEE ALSO 🔥

buckle up bestie, this list is LONG, but every single one of these is a real reference and we are NOT skipping a single one 👑

the kernel file it lives in:

  • ./drivers/pmdomain/core.c 🧚

and now, the full squad:

like I said. the whole squad. read them all, iykyk 💅

and that's the page!! 💖✨🎀

cute little sign-off before you go: this one comes from <pink>./drivers/pmdomain</pink>, and it's dated <purple>October 2026</purple> — the manual title at the bottom is just dev_pm_genpd_is_on(9) all over again, which, yeah, very on brand. go check if your genpd is on, bestie, but remember: it might change the second you look away 🦋💜

📦 where this page comes from