spi_nor_read_data(9)

📦 version 7.3.1, in nixpkgs unstable

💅 spi_nor_read_data — read data from flash memory

okay so bestie, welcome to the Kernel API Manual ✨ this is the spi_nor_read_data(9) page and it's literally the "gimme the bytes off the flash chip" function. short page, big main character energy 🎀

🌸 SYNOPSIS

ssize_t spi_nor_read_data (struct spi_nor *nor , loff_t from , size_t
len , u8 *buf );

that's the whole signature, no cap. four args, one ssize_t coming back at you 💖

✨ ARGUMENTS

  • nor — pointer to struct spi_nor 🧚 this is your flash chip's whole personality/lore in one struct
  • from — the offset to read from (i.e. where in the flash you're grabbing from)
  • len — how many bytes you wanna read
  • buf — pointer to the dst buffer, aka where the bytes go to live 🫶

💫 RETURN

number of bytes read successfully, or -errno if something went sideways 😭

🔥 SEE ALSO

the Kernel file is ./drivers/mtd/spi-nor/core.c — go look, iykyk 👑

and here's the whole friend group, every single one, in order, no skips 💅:

and that's the page!! mwah 💋 huge slay to ./drivers/mtd/spi-nor for being the source, and shoutout to October 2026 for the date stamp — see u in the next manpage bestie, stay hydrated and always check your return values 🌈🦋

📦 where this page comes from