fdt_parent_offset(9)

👑 fdt_parent_offset — a.k.a. the fdt_parent_offset(9) glow-up

Okay bestie, welcome to the Kernel API Manual corner of the group chat 💖 this one's all about fdt_parent_offset, and yes she's a kernel-API girlie from ./scripts/dtc/libfdt, don't forget it.

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✨ NAME ✨

fdt_parent_offset — find the parent of a given node 🌳💅

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🫶 SYNOPSIS 🫶

int fdt_parent_offset (const void *fdt , int nodeoffset );

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🌸 ARGUMENTS 🌸

• fdt — pointer to the device tree blob 🦋
• nodeoffset — offset of the node whose parent to find

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💜 DESCRIPTION 💜

fdt_parent_offset locates the parent node of a given node. Like, it finds the offset of the node which contains the node at nodeoffset as a subnode. So it's giving "who's your mom" but for device tree nodes 🎀 iykyk.

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💀 NOTE 💀

This function is expensive, because it must scan the device tree structure from the start to nodeoffset, twice. Not once. Twice. She's thorough, okay 😭🙈

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🌈 RETURN 🌈

• structure block offset of the parent of the node at nodeoffset (>=0), on success ✨
• -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
• -FDT_ERR_BADMAGIC, -FDT_ERR_BADVERSION, -FDT_ERR_BADSTATE, -FDT_ERR_BADSTRUCTURE, standard meanings 🔥

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🎀 SEE ALSO 🎀

Kernel file ./scripts/dtc/libfdt/libfdt.h — and literally the whole extended fam 👑

fdt_offset_ptr(9), fdt_next_tag(9), fdt_first_subnode(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_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)

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Okay that's the whole page bestie, go be iconic with it 🧚‍♀️✨ This one's sourced from ./scripts/dtc/libfdt, dated October 2026 — mwah, enjoy, periodt 💅🍓