nvmem_device_cell_read(9)

nvmem_device_cell_read(9)

💖 NAME 💖

okay so welcome to the Kernel API Manual page for nvmem_device_cell_read(9) — literally the function that reads a given nvmem device and cell. bestie, that's the whole vibe: device + cell, read it. ✨

✨ SYNOPSIS ✨

the signature is giving:

ssize_t nvmem_device_cell_read (struct nvmem_device *nvmem , struct
       nvmem_cell_info *info , void *buf );

🎀 ARGUMENTS 🎀

• nvmem — nvmem device to read from. That's your device, bestie.
• info — nvmem cell info to be read. The cell info that's getting read, periodt.
• buf — buffer pointer which will be populated on successful read. On success it gets filled in, no cap. 🫶

💖 RETURN 💖

length of successful bytes read on success and negative error code on error. So if it slays, you get the byte count; if it doesn't, negative error code. literally that simple. 💅

🌈 SEE ALSO 🌈

the whole friend group is right here — plus the kernel file:

• Kernel file ./drivers/nvmem/core.c
• nvmem_add_one_cell(9)
• nvmem_add_cells(9)
• nvmem_register_notifier(9)
• nvmem_unregister_notifier(9)
• nvmem_register(9)
• nvmem_unregister(9)
• devm_nvmem_register(9)
• of_nvmem_device_get(9)
• nvmem_device_get(9)
• nvmem_device_find(9)
• devm_nvmem_device_put(9)
• nvmem_device_put(9)
• devm_nvmem_device_get(9)
• of_nvmem_cell_get(9)
• nvmem_cell_get(9)
• devm_nvmem_cell_get(9)
• devm_nvmem_cell_put(9)
• nvmem_cell_put(9)
• nvmem_cell_read(9)
• nvmem_cell_write(9)
• nvmem_cell_read_u8(9)
• nvmem_cell_read_u16(9)
• nvmem_cell_read_u32(9)
• nvmem_cell_read_u64(9)
• nvmem_cell_read_variable_le_u32(9)
• nvmem_cell_read_variable_le_u64(9)
• nvmem_device_cell_write(9)
• nvmem_device_read(9)
• nvmem_device_write(9)
• nvmem_add_cell_lookups(9)
• nvmem_del_cell_lookups(9)
• nvmem_dev_name(9)
• nvmem_dev_size(9)

okay bye bestie 🫶💖 this one is from the ./drivers/nvmem source, dated October 2026, and it's all about nvmem_device_cell_read(9) ✨💅