dev_pm_opp_enable(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dev_pm_opp_enable — Kernel API Manual, bestie edition 🎀

okay so this is <hotpink>dev_pm_opp_enable(9)</hotpink> straight out of the Kernel API Manual, and it's literally the "un-ghost" button for an OPP. Let me walk you through it, no cap.

✨ NAME ✨

dev_pm_opp_enable — bestie, it's giving "Enable a specific OPP". that's the whole vibe. 🦋

🌸 SYNOPSIS 🌸

int dev_pm_opp_enable (struct device *dev , unsigned long freq );

two arguments, one int back, she's lowkey simple and that's the point. 💅

🎀 ARGUMENTS 🎀

  • dev — the struct device we're doing this whole operation for. like, who are we enabling an OPP for? this one. main character device energy. 👑
  • freq — the OPP frequency you wanna enable. that's the one coming back from its little hiatus. ✨

💖 DESCRIPTION 💖

so the way this works: dev_pm_opp_enable enables a provided OPP. if the operation is valid, it returns 0 — slay. otherwise you get the corresponding error value back, which is your vibe check saying "nope." 😭

the tea is that this function is meant to be used for users to make an OPP available again after it got temporarily made unavailable with dev_pm_opp_disable. so it's literally the reunion arc. dev_pm_opp_disable said "you're off the table for a sec," and dev_pm_opp_enable says "bestie, come back, we miss you." 🫶

no cap, this is the temporary unavailability route — read it as the partner-in-crime of dev_pm_opp_disable, not some brand-new OPP being born. 💀

🔥 RETURN 🔥

here's the receipts on what she hands back:

  • -EINVAL — for bad pointers 🙈 (you passed her something cursed, she's not doing that)
  • -ENOMEM — if no memory is available for the copy operation 😭
  • 0 — if no modification was done OR the modification was successful. iconic either way. ⭐

🦋 SEE ALSO 🦋

the whole group chat, fr fr. Kernel file: ./drivers/opp/core.c

and that's the whole page, bestie — go enable some OPPs responsibly 💜

source/path: ./drivers/opp · date: October 2026 · that's the sign-off, mwah 🧚✨

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