of_property_count_u8_elems(9)

💅 of_property_count_u8_elems(9) 💅

okay so bestie, this one's a kernel API manual page (section 9, the kernel API section, iykyk) and it's literally just a lil baby function that counts u8 elements in a device tree property. tiny. adorable. does one job. we respect her for that 🎀

---

✨ NAME ✨

of_property_count_u8_elems — count the number of u8 elements in a property. that's it. that's the whole gig 💖

---

🌸 SYNOPSIS 🌸

int of_property_count_u8_elems (const struct device_node *np , const char *propname );

like, you hand her a node and a property name and she tells you how many u8s are in there. no cap 🫶

---

🦋 ARGUMENTS 🦋

• np — the device node you wanna read the property value from. main character of the operation ngl 👑
• propname — the name of the property you're searching for. the little label you're gonna go hunt down 🔍

---

⭐ DESCRIPTION ⭐

so what she does is: she searches for a property inside a device node, and then counts how many u8 elements are sitting in it. that's the vibe check. property found → count the u8s → done ✨

literally nothing else. she's not doing your taxes, she's counting bytes. respect 💜

---

🔥 RETURN 🔥

• the number of elements — on success, bestie, slay 💅
• -EINVAL — if the property does not exist, or if its length doesn't match a multiple of u8 😭 (yeah, that second one is a real condition, don't @ me)
• -ENODATA — if the property exists but doesn't have a value 🙈

not me getting -EINVAL because the length wasn't a multiple of u8... anyway. check your lengths, bestie. 💀

---

🌈 SEE ALSO 🌈

where she lives: kernel file ./include/linux/of.h 🧚

and her whole friend group, fr fr:

• 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_u16_elems(9)
• of_property_count_u32_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)

like the u16/u32/u64 versions are literally her sisters, go say hi 🫶

---

that's the whole page bestie, go count some u8s 💖✨

sign-off time 🎀 this one's filed under ./include/linux, dated October 2026, and it's of_property_count_u8_elems(9) — periodt. 💅🌟