clk_get_sys(9)

📦 version 7.3.1, in nixpkgs unstable

💅 clk_get_sys(9) — Kernel API Manual ✨

okay so bestie, welcome to clk_get_sys — it's a Linux kernel API manual page and it's literally about grabbing a clock by name instead of by pointer, which is kind of iconic of it honestly 🕰️💖

🌸 NAME 🌸

clk_get_sys — get a clock based upon the device name

🎀 SYNOPSIS 🎀

struct clk * clk_get_sys (const char *dev_id , const char *con_id );

✨ ARGUMENTS ✨

  • dev_id — the device name, like literally just the name string 🫶
  • con_id — the connection ID

💜 DESCRIPTION 💜

So it returns a struct clk that corresponds to the clock producer — or a valid IS_ERR condition carrying an errno if things went sideways 😭. The way this works is the implementation uses dev_id and con_id to figure out the clock consumer, and through that, the clock producer. Slay.

Here's the tea though, in contrast to clk_get this function takes the device name instead of the device itself for identification. Different vibe, same goal 💅.

⚠️ Drivers must assume that the clock source is not enabled. No cap, just assume it's off.
🚨 And lowkey important: clk_get_sys should not be called from within interrupt context. Periodt.

🦋 SEE ALSO 🦋

Kernel file ./include/linux/clk.h plus the whole friend group 👑:

🌈 and that's the whole page, bestie! this one's sourced from ./include/linux and dated October 2026 — go off, kernel docs 💖🎀✨

📦 where this page comes from