fdt_nop_node(9)

💅 fdt_nop_node — a Kernel API Manual moment (section 9, bestie)

okay so this is fdt_nop_node(9) from the Kernel API Manual, and honestly? it's giving quiet little cleanup icon. sit down, grab a strawberry drink 🍓, and let's get into it.

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✨ NAME ✨

fdt_nop_node — replace a node (subtree) with nop tags

like, the whole node. gone. but politely. 🫶

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🦋 SYNOPSIS 🦋

int fdt_nop_node (void *fdt , int nodeoffset );

that's the whole vibe check: you hand it a blob and an offset, it hands you back an int.

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🎀 ARGUMENTS 🎀

• fdt — pointer to the device tree blob. your main character. 👑
• nodeoffset — offset of the node to nop. like, which node are we nop-ing, bestie?

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🌸 DESCRIPTION 🌸

okay so fdt_nop_node will replace a given node's representation in the blob — including all its subnodes, if there are any — with FDT_NOP tags, effectively removing it from the tree. not me deleting a whole subtree and leaving no crumbs 😭

the way this works is surgical: this function will alter only the bytes in the blob which contain the node and its properties and subnodes, and will not alter or move any other part of the tree. no cap, it stays in its lane. ✨

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🔥 RETURN 🔥

• 0 — on success 💖
• -FDT_ERR_BADOFFSET — nodeoffset did not point to FDT_BEGIN_NODE tag 🙈
• -FDT_ERR_BADMAGIC, -FDT_ERR_BADVERSION, -FDT_ERR_BADSTATE, -FDT_ERR_BADSTRUCTURE, -FDT_ERR_TRUNCATED — standard meanings 💀

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🌈 SEE ALSO 🌈

Kernel file ./scripts/dtc/libfdt/libfdt.h — and then the entire friend group, fr fr: 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_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_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)

like I said. the whole group chat. 💜

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and that's the page, bestie 🌈 — signed off from ./scripts/dtc/libfdt, dated October 2026, one last fdt_nop_node(9) for the road. slay, stay nop-y, and may your offsets always point at a FDT_BEGIN_NODE tag 💅✨🎀