rdc_pata_cable_detect(9)

📦 version 7.3.1, in nixpkgs unstable

💅 rdc_pata_cable_detect — kernel API manual, bestie edition ✨

Okay so real quick, the page header situation: this is rdc_pata_cable_detect(9) from the Kernel API Manual, and we're about to learn what it does together. Grab a snack, it's short and sweet. 🍓

🌸 NAME 🌸

rdc_pata_cable_detect — literally just probe host controller cable detect info, that's the whole vibe 💖

✨ SYNOPSIS ✨

int rdc_pata_cable_detect (struct ata_port *ap );

Look at that signature. Clean. No notes. 👑

🎀 ARGUMENTS 🎀

  • ap — the port you want cable detect info for. That's it, that's the argument, she's the main character here 🫶

🦋 DESCRIPTION 🦋

Okay so what actually happens: it reads the 80c cable indicator out of the ATA PCI device's PCI config register. Ngl, that register is normally set by firmware (BIOS) — so firmware did the homework and this function is just checking the answers. 😭

LOCKING: None. Like, none at all — it's inherited from the caller. So whoever called you already handled the locking situation, bestie. ✨

🔥 SEE ALSO 🔥

Kernel file ./drivers/ata/pata_rdc.c, plus the whole friend group:

🌈 cute sign-off 🌈

That's the whole page, no cap. Source path is ./drivers/ata, dated October 2026, and it's the rdc_pata_cable_detect(9) moment of history. Slay, go read the other ones. 💜🧚

📦 where this page comes from