STRUCT NAND_FLASH_DEV(9)

struct nand_flash_dev(9) 🌸

okay bestie, this page is straight out of the Kernel API Manual, and it’s literally the struct nand_flash_dev NAND Flash Device ID Structure. no cap, it’s giving “tiny but important kernel struct” energy 💅

✨ NAME ✨

struct nand_flash_dev — NAND Flash Device ID Structure

🌈 SYNOPSIS 🌈

       struct nand_flash_dev {
           char *name;
           union {
             struct {
               uint8_t mfr_id;
               uint8_t dev_id;
             };
             uint8_t id[NAND_MAX_ID_LEN];
           };
           unsigned int pagesize;
           unsigned int chipsize;
           unsigned int erasesize;
           unsigned int options;
           uint16_t id_len;
           uint16_t oobsize;
           struct {
             uint16_t strength_ds;
             uint16_t step_ds;
           } ecc;
        };

🫶 Members 🫶

• name — a human-readable name of the NAND chip. iconic, tbh.
• {unnamed_union} — anonymous.
• {unnamed_struct} — anonymous.
• mfr_id — manufacturer ID part of the full chip ID array (refers the same memory address as id[0]).
• dev_id — device ID part of the full chip ID array (refers the same memory address as id[1]).
• id — full device ID array.
• pagesize — size of the NAND page in bytes; if 0, then the real page size (as well as the eraseblock size) is determined from the extended NAND chip ID array.
• chipsize — total chip size in MiB.
• erasesize — eraseblock size in bytes (determined from the extended ID if 0).
• options — stores various chip bit options.
• id_len — The valid length of the id.
• oobsize — OOB size.
• ecc — ECC correctability and step information from the datasheet.
• ecc.strength_ds — The ECC correctability from the datasheet, same as the ecc_strength_ds in nand_chip{}.
• ecc.step_ds — The ECC step required by the ecc.strength_ds, same as the ecc_step_ds in nand_chip{}, also from the datasheet. For example, the "4bit ECC for each 512Byte" can be set with NAND_ECC_INFO(4, 512).

🦋 SEE ALSO 🦋

Kernel file ./include/linux/mtd/rawnand.h is the main character here, and the whole squad is:

• struct nand_parameters(9)
• struct nand_id(9)
• struct nand_ecc_step_info(9)
• struct nand_ecc_caps(9)
• struct nand_ecc_ctrl(9)
• struct nand_sdr_timings(9)
• struct nand_nvddr_timings(9)
• enum nand_interface_type(9)
• struct nand_interface_config(9)
• nand_interface_is_sdr(9)
• nand_interface_is_nvddr(9)
• nand_get_sdr_timings(9)
• nand_get_nvddr_timings(9)
• struct nand_op_cmd_instr(9)
• struct nand_op_addr_instr(9)
• struct nand_op_data_instr(9)
• struct nand_op_waitrdy_instr(9)
• enum nand_op_instr_type(9)
• struct nand_op_instr(9)
• struct nand_subop(9)
• struct nand_op_parser_addr_constraints(9)
• struct nand_op_parser_data_constraints(9)
• struct nand_op_parser_pattern_elem(9)
• struct nand_op_parser_pattern(9)
• struct nand_op_parser(9)
• struct nand_operation(9)
• struct nand_controller_ops(9)
• struct nand_controller(9)
• struct nand_legacy(9)
• struct nand_chip_ops(9)
• struct nand_manufacturer(9)
• struct nand_secure_region(9)
• struct nand_chip(9)
• nand_get_interface_config(9)
• nand_opcode_8bits(9)
• nand_get_data_buf(9)

xoxo, source/version: ./include/linux/mtd, date: October 2026 💅🎀✨