of_property_count_u64_elems(9)

📦 version 7.3.1, in nixpkgs unstable

💅 of_property_count_u64_elems(9) — like, the Kernel API Manual, but make it make sense 🎀

okay bestie, sit down, hydrate, and let me tell you about of_property_count_u64_elems — she's a little function from the Kernel API Manual and honestly? she's giving "quietly essential." no cap.

✨ NAME ✨

of_property_count_u64_elems — literally just counts how many u64 elements are chilling inside a property. that's it. that's the whole job. and she ate 💅

🦋 SYNOPSIS 🦋

int of_property_count_u64_elems (const struct device_node *np , const char *propname );

look at her. two arguments. no drama. iconic behavior only ✨

🌸 ARGUMENTS 🌸

  • np — the device node you're reading the property value from. like, the address you're pulling up to. 🏠
  • propname — the name of the property you're searching for. iykyk, you gotta know her name to find her 💖

👑 DESCRIPTION 👑

so what does she actually do? she searches for a property inside a device node and counts the number of u64 elements in it. that's the vibe check, and she passes every time 🫶

it's giving "i just need a number, not the whole array." main character energy fr fr 🧚

🔥 RETURN 🔥

what you get back, bestie:

  • the number of elements on success — slay ✨
  • -EINVAL if the property does not exist, or if its length does not match a multiple of u64 — like, the math isn't mathing 😭
  • -ENODATA if the property does not have a value — empty. void. nothing. 💀
no cap, check your return value. -EINVAL and -ENODATA are different problems and you'll wanna know which one you're dealing with, okay? 🫶

💜 SEE ALSO 💜

the whole friend group, gathered for you 🌈:

okay and finally, the sign-off 🎀 — this whole page lives in ./include/linux, it's dated October 2026, and it's filed under of_property_count_u64_elems(9). periodt. go count some elements, bestie 💖🌸✨

📦 where this page comes from