PIIXPM(4)

📦
version 11.0 · 2 versions
, in nixpkgs unstable

✨ PIIXPM(4) ✨

ok so this is a page from the Kernel Interfaces Manual bestie, and it's all about the piixpm driver 💅 welcome to the group chat, let's get into it.

🎀 NAME 🎀

piixpm — the Intel PIIX and compatible Power Management controller driver. that's the whole vibe. it manages power, it's intel-flavoured, it has friends 🫶

🌸 SYNOPSIS 🌸

piixpm* at pci? dev ? function ?
iic* at piixpm?

literally that's it, that's the config. it hangs off pci? with a dev ? and a function ?, and then iic* hangs off it. nesting dolls but make it kernel 🔥

🦋 DESCRIPTION 🦋

okay so the piixpm driver provides support for the Intel PIIX and compatible Power Management controller. only the SMBus host interface is supported — not the whole entire chip, just that part — and it can be used with the iic(4) framework. no cap 💖

supported chipsets (the honoured guests 👑):

  • ATI SB200, SB300, SB400, SB600, SB700, SB800
  • Intel 82371AB (PIIX4), 82440MX
  • Serverworks OSB4, OSB5, OSB6, HT1000SB
  • AMD FCHs (HUDSON, BOLTON and KERNCZ)

like look at that roster. iconic behaviour from basically every vendor fr fr 🌈

💜 SEE ALSO 💜

go read those next, iykyk 📚✨

🧚 HISTORY 🧚

The piixpm driver first appeared in OpenBSD 3.9 and then in NetBSD 4.0. glow-up across two operating systems, we love a crossover episode 💫

🌟 AUTHORS 🌟

The current piixpm driver was written by Alexander Yurchenko <grange@openbsd.org> — and then it was ported to NetBSD by Jared D. McNeill <jmcneill@netbsd.org>. two legends, one driver, main character energy from both 🫶👑

💀 BUGS 💀

The driver doesn't support I2C commands with a data buffer size of more than 2 bytes.

not me finding the one thing it can't do 😭 so if your buffer is 3 bytes and up, respectfully, this driver is not the one. know your limits bestie 💅

and that's the page!! this one shipped in the Debian packaging of the manual, dated January 14, 2020 — so yeah, that's the version and date, cute little sign-off, mwah 💋 see u in the next manpage 🦋🎀

📦 where this page comes from