spi_nor_read_raw(9)

💅 spi_nor_read_raw(9) — the Kernel API Manual, but make it make sense

okay so this is spi_nor_read_raw(9), straight out of the Kernel API Manual, and it's literally the raw read of serial flash memory. bestie, before you even think about calling this, know that read_opcode, addr_nbytes and read_dummy — all three of those members of the struct spi_nor — should be previously set. like, set them first. 🙈

✨ NAME ✨

spi_nor_read_raw — raw read of serial flash memory. read_opcode, addr_nbytes and read_dummy members of the struct spi_nor should be previously set.

🎀 SYNOPSIS 🎀

int spi_nor_read_raw (struct spi_nor *nor , u32 addr , size_t len , u8
*buf );

🌸 ARGUMENTS 🌸

• nor — pointer to a 'struct spi_nor' 🦋
• addr — offset in the serial flash memory
• len — number of bytes to read
• buf — buffer where the data is copied into (dma-safe memory, no cap, keep it dma-safe or it's giving chaos 💀)

⭐ RETURN ⭐

0 on success, -errno otherwise. that's it, that's the whole vibe check. 🫶

ngl, if you get anything other than 0 back it's a -errno situation, so go read the errno and be nice to yourself about it. 💖

👑 SEE ALSO 👑

Kernel file ./drivers/mtd/spi-nor/sfdp.c and honestly the whole friend group:

• spi_nor_read_sfdp(9)
• spi_nor_read_sfdp_dma_unsafe(9)
• spi_nor_set_erase_settings_from_bfpt(9)
• spi_nor_map_cmp_erase_type(9)
• spi_nor_sort_erase_mask(9)
• spi_nor_regions_sort_erase_types(9)
• spi_nor_parse_bfpt(9)
• spi_nor_smpt_addr_nbytes(9)
• spi_nor_smpt_read_dummy(9)
• spi_nor_get_map_in_use(9)
• spi_nor_region_check_overlay(9)
• spi_nor_init_non_uniform_erase_map(9)
• spi_nor_parse_smpt(9)
• spi_nor_parse_4bait(9)
• spi_nor_parse_profile1(9)
• spi_nor_parse_sccr(9)
• spi_nor_parse_sccr_mc(9)
• spi_nor_post_sfdp_fixups(9)
• spi_nor_check_sfdp_signature(9)
• spi_nor_parse_sfdp(9)

okay that's the whole page, mwah 💅✨ this iconic little entry lives in ./drivers/mtd/spi-nor and it's dated October 2026 — periodt. 🎀🔥