overlay_adju...ode_phandles(9)

💅 overlay_adjust_node_phandles(9) — from the Kernel API Manual, bestie ✨

okay so we're diving into the Kernel API Manual today and honestly? this one is a lil' niche but it slaps once you get it. it's a C function from the device-tree overlay world, and no cap, it's doing that effortless background-character work that keeps everything from falling apart. 🎀

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✨ NAME ✨

overlay_adjust_node_phandles — literally just offsets the phandles of a node. that's it. that's the vibe. 💅

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🦋 SYNOPSIS 🦋

int overlay_adjust_node_phandles (void *fdto , int node , uint32_t delta
);

three args, one int coming back at you. copy it exactly like that, spaces and all — the manpage said so, so we say so. 🫶

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🌸 ARGUMENTS 🌸

• fdto — the device tree overlay blob. yes, that blob. the whole overlay situation lives in here 🧚
• node — the offset of the node we wanna adjust. like, which node are we messing with, bestie
• delta — the offset to shift the phandles by. the amount. the shimmy. the ✨delta✨

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💖 DESCRIPTION 💖

okay so here's the tea: overlay_adjust_node_phandles adds a constant to all the phandles of a given node. every single one. it's giving "group chat, everyone gets the same message." 💀

and it's mainly used as part of the overlay application process — you know, when we want to update all the overlay phandles so they don't conflict with the overlays of the base device tree. so it's lowkey the peacekeeper. highkey iconic. 👑

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🌈 RETURN 🌈

• 0 on success 🎉
• a negative error code on failure 😭

that's the whole contract. no surprises, no drama (unless it's negative, then there's a lil' drama).

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🔥 SEE ALSO 🔥

• the kernel file: ./scripts/dtc/libfdt/fdt_overlay.c — go read the source, iykyk 📖
• overlay_get_target_phandle(9)
• overlay_phandle_add_offset(9)
• overlay_adjust_local_phandles(9)
• overlay_update_local_node_references(9)
• overlay_update_local_references(9)
• overlay_fixup_one_phandle(9)
• overlay_fixup_phandle(9)
• overlay_fixup_phandles(9)
• overlay_adjust_local_conflicting_phandle(9)
• overlay_update_node_conflicting_references(9)
• overlay_update_local_conflicting_references(9)
• overlay_prevent_phandle_overwrite_node(9)
• overlay_prevent_phandle_overwrite(9)
• overlay_apply_node(9)
• overlay_merge(9)
• overlay_symbol_update(9)

that's a whole friend group of functions right there. they all show up together, they all know each other, they all text back. 🫶💜

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⭐ friendly reminder: the args are typed void *fdto, int node, uint32_t delta and the return is int. keep those exact, don't get creative with the types, that's not the assignment bestie.

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and that's the whole page, no notes! 💖 straight from ./scripts/dtc/libfdt, dated October 2026, in the Kernel API Manual — the section is literally named ./scripts/dtc/libfdt and the date is literally October 2026, so yeah, that's the whole sign-off. mwah. 💋🎀🦋