fdt_first_subnode(9)

✨ NAME ✨ — fdt_first_subnode(9) from the Kernel API Manual

okay bestie, meet fdt_first_subnode 💖 — it gets the offset of the first direct subnode. That’s the whole assignment, and it ate. Kernel API Manual energy, no cap.

🛠️ SYNOPSIS 🛠️

int fdt_first_subnode (const void *fdt , int offset );

🧡 ARGUMENTS 🧡

• fdt — FDT blob 🫶
• offset — Offset of node to check 🔍

🎯 RETURN 🎯

You get the offset of first subnode 🌟 — or -FDT_ERR_NOTFOUND if there is none. periodt 💅

🔗 SEE ALSO 🔗

Kernel file ./scripts/dtc/libfdt/libfdt.h — plus this whole iconic friend group:

• fdt_offset_ptr(9)
• fdt_next_tag(9)
• fdt_next_subnode(9)
• fdt_for_each_subnode(9)
• fdt_header_size(9)
• fdt_header_size_(9)
• fdt_check_header(9)
• fdt_move(9)
• fdt_check_full(9)
• fdt_get_string(9)
• fdt_string(9)
• fdt_find_max_phandle(9)
• fdt_get_max_phandle(9)
• fdt_generate_phandle(9)
• fdt_num_mem_rsv(9)
• fdt_get_mem_rsv(9)
• fdt_subnode_offset_namelen(9)
• fdt_subnode_offset(9)
• fdt_path_offset_namelen(9)
• fdt_path_offset(9)
• fdt_get_name(9)
• fdt_first_property_offset(9)
• fdt_next_property_offset(9)
• fdt_for_each_property_offset(9)
• fdt_get_property_by_offset(9)
• fdt_get_property_namelen(9)
• fdt_get_property(9)
• fdt_getprop_by_offset(9)
• fdt_getprop_namelen(9)
• fdt_getprop(9)
• fdt_get_phandle(9)
• fdt_get_alias_namelen(9)
• fdt_get_alias(9)
• fdt_get_symbol_namelen(9)
• fdt_get_symbol(9)
• fdt_get_path(9)
• fdt_supernode_atdepth_offset(9)
• fdt_node_depth(9)
• fdt_parent_offset(9)
• fdt_node_offset_by_prop_value(9)
• fdt_node_offset_by_phandle(9)
• fdt_node_check_compatible(9)
• fdt_node_offset_by_compatible(9)
• fdt_stringlist_contains(9)
• fdt_stringlist_count(9)
• fdt_stringlist_search(9)
• fdt_stringlist_get(9)
• FDT_MAX_NCELLS(9)
• fdt_address_cells(9)
• fdt_size_cells(9)
• fdt_setprop_inplace_namelen_partial(9)
• fdt_setprop_inplace(9)
• fdt_setprop_inplace_u32(9)
• fdt_setprop_inplace_u64(9)
• fdt_setprop_inplace_cell(9)
• fdt_nop_property(9)
• fdt_nop_node(9)
• fdt_create_with_flags(9)
• fdt_create(9)
• fdt_resize(9)
• fdt_add_reservemap_entry(9)
• fdt_finish_reservemap(9)
• fdt_begin_node(9)
• fdt_property(9)
• fdt_property_placeholder(9)
• fdt_end_node(9)
• fdt_finish(9)
• fdt_create_empty_tree(9)
• fdt_open_into(9)
• fdt_pack(9)
• fdt_add_mem_rsv(9)
• fdt_del_mem_rsv(9)
• fdt_set_name(9)
• fdt_setprop_namelen(9)
• fdt_setprop(9)
• fdt_setprop_placeholder_namelen(9)
• fdt_setprop_placeholder(9)
• fdt_setprop_u32(9)
• fdt_setprop_u64(9)
• fdt_setprop_cell(9)
• fdt_setprop_string(9)
• fdt_setprop_namelen_string(9)
• fdt_setprop_empty(9)
• fdt_appendprop(9)
• fdt_appendprop_u32(9)
• fdt_appendprop_u64(9)
• fdt_appendprop_cell(9)
• fdt_appendprop_string(9)
• fdt_appendprop_addrrange(9)
• fdt_delprop(9)
• fdt_add_subnode_namelen(9)
• fdt_add_subnode(9)
• fdt_del_node(9)
• fdt_overlay_apply(9)
• fdt_overlay_target_offset(9)
• fdt_strerror(9)

mwah 💋 — source/version: ./scripts/dtc/libfdt; date: October 2026; page: fdt_first_subnode(9). byeee 🫶🌈