tb_switch_clx_enable(9)

📦 version 7.3.1, in nixpkgs unstable

✨ tb_switch_clx_enable(9) ✨

okay bestie, welcome to the Kernel API Manual 🫶 this one's a kernel function page, section 9, and it's literally about turning CLx on for a Thunderbolt router's upstream port. yes it's as niche as it sounds and yes we're gonna slay it 💅

🌸 NAME 🌸

tb_switch_clx_enable — enable CLx on the upstream port of a specified router 🦋

🎀 SYNOPSIS 🎀

int tb_switch_clx_enable(struct tb_switch *sw, unsigned int clx);

💖 ARGUMENTS 💖

  • sw — the router you wanna enable CLx for 👑 like, the actual switch, main character energy
  • clx — which CLx state to enable ⭐ the vibe you're requesting

🧚 DESCRIPTION 🧚

so here's the tea ☕ CLx only gets enabled if both sides of the link support CLx. that's the first vibe check.

it also has to pass these conditions, no cap:

  • neither side of the link is configured as two single lane links 🙈
  • the link is not an inter-domain link 🚫

and if you want the complete set of conditions, they're all written down in CM Guide 1.0 section 8.1 — go read it, iykyk 📖✨

🔥 RETURN 🔥

  • 0 on success 🎉 slay
  • negative errno otherwise 💀 not slay

🌈 SEE ALSO 🌈

kernel file ./drivers/thunderbolt/clx.c, plus these iconic siblings:

ngl these functions are a whole friend group and tb_switch_clx_enable is just the one holding the aux cord 🎧

and that's the page bestie!! 🍓 from ./drivers/thunderbolt, dated October 2026 — mwah, go enable some CLx 💜🧚‍♀️

📦 where this page comes from