zynqmp_pm_clock_get_parents(9)

📦 version 7.3.1, in nixpkgs unstable

💅 zynqmp_pm_clock_get_parents(9) 💅

Okay so bestie, welcome to the Kernel API Manual page for zynqmp_pm_clock_get_parents(9) — yes that's the whole name, it's giving "my function name is a paragraph" but we move 🫶. This is the ZynqMP clock corner of the kernel, and honestly? It's iconic.

✨ NAME ✨

zynqmp_pm_clock_get_parents — grab the first 3 parents of a clock for a given id. That's it, that's the vibe. Three parents, no cap 💅

🌸 SYNOPSIS 🌸

int zynqmp_pm_clock_get_parents (u32 clock_id , u32 index , struct
parents_resp *response );

🎀 ARGUMENTS 🎀

  • clock_id — the Clock ID, aka which clock we're talking about 💖
  • index — the Parent index, aka where in the parent lineup you're starting 👑
  • response — the Parents of the given clock, where the answer gets dropped off 🦋

⭐ DESCRIPTION ⭐

So this function is literally used to get 3 parents for the clock specified by the given clock ID. Three at a time, that's the whole deal ✨

Here's the cute part: this API returns 3 parents with a single response. But what if your clock has more than 3 parents? Not me leaving you hanging — there's a whole loop situation. To get the other parents, the master should call the same API in a loop with a new parent index till error is returned. Lowkey genius, highkey efficient 😭

The example, because examples ate:

  • First call should have index 0, which will return parents 0, 1 and 2 🍓
  • Next call, index should be 3, which will return parent 3, 4 and 5 🧚
  • …and so on, forever, until the error shows up and tells you to stop 💀

🌈 RETURN 🌈

0 on success, else error+reason — like, it tells you what went wrong, we love a communicative king 🙈

🦋 SEE ALSO 🦋

Kernel file ./drivers/clk/zynqmp/clkc.c, plus this whole friend group:

Heads up bestie: this page lives at ./drivers/clk/zynqmp, it's dated October 2026, and it answers to the name zynqmp_pm_clock_get_parents(9). Screenshot it, memorize it, live by it 💜

That's the whole page, periodt. Go get those three parents 🌸🫶

📦 where this page comes from