STRUCT NVMEM_CELL_INFO(9)

💖 struct nvmem_cell_info(9) 💖

okay bestie, welcome to the Kernel API Manual — this is the page for struct nvmem_cell_info, aka the little glow-up sheet that describes one single NVMEM cell. no cap, it's giving "character creation screen for your EEPROM data". let's get into it 🎀

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✨ NAME ✨

struct nvmem_cell_info — NVMEM cell description. that's it, that's the whole vibe: it's the description of a cell. 🦋

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🌸 SYNOPSIS 🌸

struct nvmem_cell_info {
    const char              *name;
    unsigned int            offset;
    size_t raw_len;
    unsigned int            bytes;
    unsigned int            bit_offset;
    unsigned int            nbits;
    struct device_node      *np;
    nvmem_cell_post_process_t read_post_process;
    void *priv;
 };

like, look at her. every field is a little main character in her own right. let's meet them one by one 👑

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🌈 Members 🌈

• name — Name. yes bestie, she has a name. iconic behavior only. 💅
• offset — Offset within the NVMEM device. literally where in the device this cell lives, so you don't go grabbing the wrong bytes like a menace.
• raw_len — Length of raw data (without post processing). this is the pre-glow-up length, before any post processing gets its hands on it. 🧚
• bytes — Length of the cell. the actual cell length, fr fr.
• bit_offset — Bit offset if cell is smaller than a byte. yes, bit offset — we're going sub-byte, we're going feral, we're counting individual bits now. 😭
• nbits — Number of bits. how many of those little guys we're working with.
• np — Optional device_node pointer. optional! she doesn't have to be there! lowkey a free spirit. 🦋
• read_post_process — Callback for optional post processing of cell data on reads. so when you read, this hook can do a little extra processing on the data. also optional, also a free spirit. ✨
• priv — Opaque data passed to the read_post_process hook. the mystery bag 🎀 you hand it over and the hook figures it out — not our business what's inside, and that's the point.

ngl the "optional" ones are lowkey the moment here — np and read_post_process can both just... not exist on a given cell, and that's valid 💜

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🔥 SEE ALSO 🔥

• Kernel file ./include/linux/nvmem-provider.h
• struct nvmem_keepout(9)
• struct nvmem_config(9)
• struct nvmem_layout(9)
• of_nvmem_layout_get_container(9)

go read those next, bestie, iykyk 🫶

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and that's the whole page!! slay 💖 this masterpiece lives in ./include/linux and it's dated October 2026, and the page footer is literally just struct nvmem_cell_info(9) again because she's her own hype woman. periodt. 👑⭐