of_property_count_u32_elems(9)

🦋 of_property_count_u32_elems(9) — the Kernel API Manual page, bestie edition ✨

okay so you're in the Kernel API Manual and the star of the show today is of_property_count_u32_elems(9) 💅 she's a little function with one job and she does it immaculately.

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🌸 NAME 🌸

of_property_count_u32_elems — literally just counts how many u32 elements are chilling inside a property. that's it. that's the whole gig. no cap 🎀

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✨ SYNOPSIS ✨

int of_property_count_u32_elems (const struct device_node *np , const
char *propname );

like look at her. returns an int, takes a const struct device_node *np and a const char *propname. iconic signature, no notes 🫶

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💖 ARGUMENTS 💖

• np — the device node you're reading the property value from. this is your main character — everything happens inside her 💅
• propname — the name of the property you're out here searching for. yes bestie, you gotta know her name 🎀

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🔥 DESCRIPTION 🔥

so what she does is: search for a property in a device node, and count the number of u32 elements in it. that's the vibe check, that's the whole task, and she ate 💀✨

no guessing, no extra lore — find the property, count the u32s inside it, done. periodt 🧚

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💀 RETURN 💀

here's what she hands back to you:

• the number of elements on success — slay 👑
• -EINVAL if the property does not exist or if its length does not match a multiple of u32 😭 (yeah, that second one is a real heartbreak, watch your byte counts)
• -ENODATA if the property does not have a value 💔

fr fr check your return value, like don't just assume she worked, the errors are real and they will humble you 🙈

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🌈 SEE ALSO 🌈

goes without saying but imma say it anyway — she lives in the kernel file ./include/linux/of.h 📁 and these are her besties:

• of_node_init(9)
• of_machine_is_compatible(9)
• of_parse_phandle(9)
• of_parse_phandle_with_args(9)
• of_parse_phandle_with_fixed_args(9)
• of_parse_phandle_with_optional_args(9)
• of_phandle_args_equal(9)
• of_property_count_u8_elems(9)
• of_property_count_u16_elems(9)
• of_property_count_u64_elems(9)
• of_property_read_string_array(9)
• of_property_count_strings(9)
• of_property_read_string_index(9)
• of_property_present(9)
• of_property_read_u8_array(9)
• of_property_read_u16_array(9)
• of_property_read_u32_array(9)
• of_property_read_u64_array(9)
• struct of_changeset_entry(9)
• struct of_changeset(9)
• of_device_is_system_power_controller(9)
• of_have_populated_dt(9)

iykyk, that's a whole friend group and they're all lowkey serving 💜

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and that's the page!! 🦋💖 source dir is ./include/linux and the date on this one is October 2026, and the page herself is of_property_count_u32_elems(9) — mwah, go count some elements bestie, you're gonna do amazing 🍓✨💅