ufshcd_devfreq_scale(9)

📦 version 7.3.1, in nixpkgs unstable

🦋 ufshcd_devfreq_scale(9) — the Kernel API Manual, bestie edition 🦋

okay so this is a page from the Kernel API Manual (section 9, the kernel-internal one, iykyk) and it's all about one little function that handles the UFS clocks-and-gear glow-up ✨

✨ NAME ✨

ufshcd_devfreq_scale — literally the function that scales UFS clocks and gear up or down 💅

🌸 SYNOPSIS 🌸

int ufshcd_devfreq_scale (struct ufs_hba *hba , unsigned long freq ,
       bool scale_up );

like yes bestie that's the whole signature, no notes 🫶

🎀 ARGUMENTS 🎀

  • hba — your per adapter instance, the main character of this whole situation 👑
  • freq — the frequency to scale, i.e. the number you're feeding in 🌈
  • scale_up — True for scaling up and false for scaling down (that's the whole vibe check) ⭐

💖 RETURN 💖

So here's the tea:

  • 0 — success, we ate 🔥
  • -EBUSY — scaling can't happen at this time, honest to god it's just not the moment 😭
  • non-zero — literally any other errors, so keep an eye out 👀

💜 SEE ALSO 💜

The Kernel file lives at ./drivers/ufs/core/ufshcd.c and ngl the friend group here is huge — like the whole ufshcd cinematic universe shows up. Here's every single one, no cap, no skips 🧚:

bestie that's a lot of friends and every single one of them is invited to the group chat 🫶

and that's the whole page! 💅 this one lives in ./drivers/ufs/core and it's dated October 2026 — screaming, crying, marking the calendar 😭 mwah, go scale some clocks, ily ⭐💖🎀

📦 where this page comes from