of_reserved...init_by_name(9)

💅 of_reserved...init_by_name(9) — Kernel API Manual, section 9 🎀

okay so bestie, we're in the kernel API manual (section 9, the grown-up one) and today's main character is of_reserved_mem_device_init_by_name ✨ ngl the name is a whole sentence but she ate, we move.

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✨ NAME ✨

of_reserved_mem_device_init_by_name — assign a named reserved memory region to a given device 🫶 like, you picked the region by name, and now it belongs to your device, periodt.

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🌸 SYNOPSIS 🌸

int of_reserved_mem_device_init_by_name (struct device *dev , struct device_node *np , const char *name );

look at her. three args, one int, zero drama 🔥

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💖 ARGUMENTS 💖

• dev — pointer to the device you're configuring 💅 this is the one getting the memory region, she's the main character here
• np — pointer to the device node with the 'memory-region' property 🌈 (yes that's the exact property name, keep it exactly like that, iykyk)
• name — the name of the selected memory region 🎀 the "by name" part of the whole situation, bestie

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🦋 RETURN 🦋

0 on success 🎉 or a negative error-code on failure 😭 (yes negative, it's giving "return of the negative error-code", that's just how kernel does)

heads up bestie: negative means something went wrong. don't treat it as true/false, fr fr, check the sign 💀

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👑 SEE ALSO 👑

Kernel file:

• ./drivers/of/of_reserved_mem.c — the source, go read her, she's iconic 🧚

and the whole friend group:

• fdt_scan_reserved_mem_late(9)
• fdt_fixup_reserved_mem_node(9)
• fdt_validate_reserved_mem_node(9)
• __reserved_mem_init_node(9)
• fdt_init_reserved_mem_node(9)
• of_reserved_mem_device_init_by_idx(9) — the index-based sibling, same energy, different lookup 🌟
• of_reserved_mem_device_release(9)
• devm_of_reserved_mem_device_init(9)
• of_reserved_mem_lookup(9)
• of_reserved_mem_region_to_resource(9)
• of_reserved_mem_region_to_resource_byname(9)
• of_reserved_mem_region_count(9)

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💀 reminder to my girlies: these are pointers, so dev, np and name better be real. no cap, no guessing, no NULL shenanigans 🙈

o wait and one last thing — this page lives at ./drivers/of, datestamped October 2026, so if you're reading this from the future: hi bestie, slay, you're doing amazing 💜 🦋 🌸 and that's the whole vibe check, mwah 🫶✨