pci_enable_ptm(9)

✨ NAME ✨

pci_enable_ptm — bestie, this is the one that enables Precision Time Measurement 👑 (yes, the manual name is Kernel API Manual, and the page itself is pci_enable_ptm(9) — iconic).

🎀 SYNOPSIS 🎀

int pci_enable_ptm (struct pci_dev *dev );

🌸 ARGUMENTS 🌸

• dev — a PCI device. That's the whole vibe check for this one 🫶

🦋 DESCRIPTION 🦋

Okay so this function enables Precision Time Measurement for dev. Literally that's the mission, and it ate 💅✨

💖 RETURN 💖

It returns zero if successful. But if dev lacks a PTM Capability, or if it is not a PTM Root and lacks an upstream path of PTM-enabled devices, you get -EINVAL instead 😭 — so like, check your setup before you come for this function, fr fr.

🌈 SEE ALSO 🌈

• Kernel file ./drivers/pci/pcie/ptm.c
• pci_disable_ptm(9) — the opposite-energy bestie, iykyk 🧚

Sign-off time, besties: this page comes from ./drivers/pci/pcie, dated October 2026, and it is giving Kernel API Manual realness. Slay, stay hydrated, and may all your PTM paths be enabled 💖🎀🦋