overlay_phandle_add_offset(9)

💅 overlay_phandle_add_offset 💅

okay so bestie, this is a page from the Kernel API Manual, section 9 — yes, the kernel docs, but make it cute. sit down, grab a strawberry drink 🍓, and let me tell you about the little function that bumps a phandle's whole number up by an offset. no cap, it's iconic.

---

✨ NAME ✨

overlay_phandle_add_offset — literally just increases a phandle by an offset 🎀 that's it, that's the vibe

---

🌸 SYNOPSIS 🌸

int overlay_phandle_add_offset (void *fdt , int node , const char *name
, uint32_t delta );

---

🦋 ARGUMENTS 🦋

• fdt — the base device tree blob, your main character 💅
• node — the device tree overlay blob (yes bestie, the overlay one, don't get it twisted)
• name — the name of the property you wanna modify — it's either phandle or linux,phandle 👑
• delta — the offset you're applying, the amount of ✨change✨

---

💖 DESCRIPTION 💖

so overlay_phandle_add_offset increments a node phandle by a given offset. that's the whole thing, fr fr. it takes the phandle and adds delta to it. slay. no drama, no notes 🫶

---

🔥 RETURN 🔥

• 0 on success 🎉
• a negative error code on error 😭 (not me getting a negative return... anyway)

---

🌈 SEE ALSO 🌈

bestie these are all the sibling functions, the whole friend group, the group chat if you will 💬:

• the kernel file ./scripts/dtc/libfdt/fdt_overlay.c — that's where the magic lives 👀
• overlay_get_target_phandle(9)
• overlay_adjust_node_phandles(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)

go read them all, i'll wait 🧚

---

ok that's the whole page bestie, go touch some grass and then go adjust some phandles 💜

---

and finally, the cute lil sign-off: this one lives in ./scripts/dtc/libfdt 💅, and it's dated October 2026 ⭐ — periodt, that's the version, bye bestie 🎀✨