fwnode_get_...d_node_count(9)

💅 fwnode_get_...d_node_count(9) — like, the Kernel API Manual, section 9, bestie 🎀

okay so real talk, this is from the Kernel API Manual (section 9, we love a classic), and the whole page is about fwnode_get_named_child_node_count. yes the title got chopped with an ellipsis, it's giving "name too long for the header", we've all been there 💀

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✨ NAME ✨

fwnode_get_named_child_node_count — literally just counts how many child nodes have a given name. that's it. that's the whole job 🫶

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🌸 SYNOPSIS 🌸

unsigned int fwnode_get_named_child_node_count (const struct fwnode_handle *fwnode , const char *name );

two args, one unsigned int coming back at you, no cap ✨

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🦋 ARGUMENTS 🦋

• fwnode — the node whose child nodes are being counted. like, the mom node. the main character. everything below it gets scanned 👑
• name — the string you're matching child node names against. exact name energy only, bestie 🎯

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💖 DESCRIPTION 💖

so what it does is scan the child nodes and count all the ones that have a specific name. that's the vibe check, and honestly it's giving "let me just tally my faves" 🧚

Potential E.g.:

fwnode_get_named_child_node_count(fwnode, "channel");

and like, fwnode_get_named_child_node_count(fwnode, "channel"); would match all the nodes:

channel { }, channel0 {}, channel0xabba {}...

see how it's not just the bare channel? it's matching the whole lil family, prefix-style. iconic behaviour honestly 🍓

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⭐ RETURN ⭐

returns the number of child nodes with a matching name for a given device. a unsigned int, sitting there, counting. we stan a numeric queen 💜

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🔥 SEE ALSO 🔥

kernel file ./drivers/base/property.c — and like, the entire extended friend group of property functions, all in section 9:

• device_property_present(9)
• fwnode_property_present(9)
• device_property_read_bool(9)
• fwnode_property_read_bool(9)
• device_property_read_u8_array(9)
• device_property_read_u16_array(9)
• device_property_read_u32_array(9)
• device_property_read_u64_array(9)
• device_property_read_string_array(9)
• device_property_read_string(9)
• device_property_match_string(9)
• fwnode_property_read_u8_array(9)
• fwnode_property_read_u16_array(9)
• fwnode_property_read_u32_array(9)
• fwnode_property_read_u64_array(9)
• fwnode_property_read_string_array(9)
• fwnode_property_read_string(9)
• fwnode_property_match_string(9)
• fwnode_property_match_property_string(9)
• fwnode_property_get_reference_args(9)
• fwnode_find_reference(9)
• fwnode_get_name(9)
• fwnode_get_name_prefix(9)
• fwnode_name_eq(9)
• fwnode_get_parent(9)
• fwnode_get_next_parent(9)
• fwnode_count_parents(9)
• fwnode_get_nth_parent(9)
• fwnode_get_next_child_node(9)
• fwnode_get_next_available_child_node(9)
• device_get_next_child_node(9)
• fwnode_get_named_child_node(9)
• device_get_named_child_node(9)
• fwnode_handle_get(9)
• fwnode_device_is_available(9)
• fwnode_get_child_node_count(9)
• fwnode_get_phy_mode(9)
• device_get_phy_mode(9)
• fwnode_iomap(9)
• fwnode_irq_get(9)
• fwnode_irq_get_byname(9)
• fwnode_graph_get_next_endpoint(9)
• fwnode_graph_get_port_parent(9)
• fwnode_graph_get_remote_port_parent(9)
• fwnode_graph_get_remote_port(9)
• fwnode_graph_get_remote_endpoint(9)
• fwnode_graph_get_endpoint_by_id(9)
• fwnode_graph_get_endpoint_count(9)
• fwnode_graph_parse_endpoint(9)
• fwnode_connection_find_match(9)
• fwnode_connection_find_matches(9)

like, an entire roster. go read them, iykyk 📚✨

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ngl the header is a whole tragedy: fwnode_get_...d_node_count(9) — truncated mid-name, screaming into the void 😭 and the whole page lives under ./drivers/base, stamped October 2026. consider this your cute lil sign-off bestie, mwah 💋🌈

that's the page!! go count some nodes, periodt 💅✨