pwrdm_read_prev_mem_pwrst(9)

📦 version 7.3.1, in nixpkgs unstable

Hey bestie! 👋 So you want to peek at a powerdomain's memory bank tea? Say less, I got you 💖 This is the pwrdm_read_prev_mem_pwrst page from the Kernel API Manual — the one and only, iconic, no cap.

✨ NAME ✨

pwrdm_read_prev_mem_pwrst — get previous memory bank power state 🫶

Okay so literally, this function tells you what power state a memory bank was in before — like its past vibe. Giving receipts, basically. 💅

🌸 SYNOPSIS 🌸

int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank);

🦋 ARGUMENTS 🦋

  • pwrdm — your struct powerdomain *, the actual powerdomain you're interrogating to get that previous memory bank power state. Like, which powerdomain are we snooping on? 👀
  • bank — the memory bank number, and it's gotta be in the range 0-3. That's it. That's the whole range. Don't come at it with anything else. 🙈

🎀 DESCRIPTION 🎀

So here's the deal bestie 🌈: this returns the powerdomain pwrdm's previous memory power state for bank bank. It's giving main character energy — very "what was the vibe last time, king?"

But hold up, because there are receipts (error receipts, the dramatic kind 💀):

Returns -EINVAL if the pwrdm pointer is null — like, you literally passed me nothing, bestie, that's a no. 💀
Returns -EEXIST if the target memory bank does not exist or is not controllable — so the bank you're asking about? Not a thing, or not a thing you can mess with, periodt. ✋

Otherwise, upon success? It returns the previous memory power state. Slay. 🎉🔥

⭐ SEE ALSO ⭐

Kernel file ./arch/arm/mach-omap2/powerdomain.c — go read it, it's the source of truth and it ate, ngl 🧚💜

And here's the whole bestie friend group of related functions, no one left behind 💅:

That's the whole page bestie, you ate that reading ngl. 💖

Man page vibes from ./arch/arm/mach-omap2, dated October 2026 — literally so recent it's giving future icon energy 🦋✨ Love you, bye! 💅🎀

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