dev_pm_opp_adjust_voltage(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dev_pm_opp_adjust_voltage — Kernel API Manual

okay so bestie, welcome to the glow-up page for dev_pm_opp_adjust_voltage(9). This is a kernel API manual, and we're about to make voltage tweaks make sense. ✨

🌸 NAME

dev_pm_opp_adjust_voltage — the little helper whose whole job is changing the voltage of an OPP. That's it, that's the vibe. 🎀

🦋 SYNOPSIS

int dev_pm_opp_adjust_voltage (struct device *dev , unsigned long freq ,
unsigned long u_volt , unsigned long u_volt_min , unsigned long
u_volt_max );

Like, five arguments, one int back. Slay. 💅

💖 ARGUMENTS

  • dev — the device we're doing this whole operation for. Main character energy, honestly.
  • freq — the OPP frequency whose voltage you wanna adjust. Find it first, okay?
  • u_volt — the new OPP target voltage. The moment. The goal. 👑
  • u_volt_min — the new OPP min voltage, because boundaries are healthy.
  • u_volt_max — the new OPP max voltage. Ceiling queen. 🌈

⭐ RETURN

  • -EINVAL — bad pointers, bestie. Like, the pointer vibe check failed. 😭
  • -ENOMEM — no memory available for the copy operation. Not enough room, it's giving crowded.
  • 0 — returns 0 if no modification was done OR if the modification was successful. Yes, both. Iconic, confusing, periodt. 💀
ngl, that last one is a real "was anything even done?" moment, but that's literally what it says, so. 🫶

🧚 SEE ALSO

The kernel file ./drivers/opp/core.c and, like, the entire OPP friend group — no cap, here's everyone:

and that's the whole page, bestie 💜

shoutout to the source at ./drivers/opp and the date October 2026 — this one's brought to you by the dev_pm_opp_adjust_voltage(9) girlies, published in the Kernel API Manual. go adjust some voltage, ily 🎀💖

📦 where this page comes from