nand_unlock(9)

💅 nand_unlock(9) — Kernel API Manual, bestie edition ✨

🎀 NAME 🎀

okay so nand_unlock is the [MTD Interface] unlock-the-NAND-flash bestie 💖 like, literally: unlock the NAND flash. no cap, that’s her whole job.

✨ SYNOPSIS ✨

the signature is giving exactly this, do not freestyle it:

int nand_unlock (struct mtd_info *mtd , loff_t ofs , uint64_t len );

🌸 ARGUMENTS 🌸

• mtd — MTD device structure. the actual device struct, bestie 🪪
• ofs — offset byte address. where we’re starting, pinpoint energy 📍
• len — number of bytes to unlock (must be a multiple of block/page size). the “must be a multiple of block/page size” part is not a suggestion, okay? do not freestyle it 😭

🦋 SEE ALSO 🦋

the kernel file is ./drivers/mtd/nand/raw/nand_base.c — and if you want the whole lore, these are the cross-refs, every single one made the cut 👑

nand_extract_bits(9),
nand_select_target(9), nand_deselect_target(9), nand_release_device(9),
nand_bbm_get_next_page(9), nand_block_bad(9), nand_region_is_secured(9),
nand_get_device(9), nand_check_wp(9), nand_fill_oob(9),
nand_do_write_oob(9), nand_default_block_markbad(9),
nand_markbad_bbm(9), nand_block_markbad_lowlevel(9),
nand_block_isreserved(9), nand_block_checkbad(9), nand_soft_waitrdy(9),
nand_gpio_waitrdy(9), panic_nand_wait(9), nand_reset_interface(9),
nand_setup_interface(9), nand_choose_best_sdr_timings(9),
nand_choose_best_nvddr_timings(9), nand_choose_best_timings(9),
nand_choose_interface_config(9), nand_fill_column_cycles(9),
nand_read_page_op(9), nand_read_param_page_op(9),
nand_change_read_column_op(9), nand_read_oob_op(9),
nand_prog_page_begin_op(9), nand_prog_page_end_op(9),
nand_prog_page_op(9), nand_change_write_column_op(9), nand_readid_op(9),
nand_status_op(9), nand_exit_status_op(9), nand_erase_op(9),
nand_set_features_op(9), nand_get_features_op(9), nand_reset_op(9),
nand_read_data_op(9), nand_write_data_op(9), struct
nand_op_parser_ctx(9), nand_op_parser_must_split_instr(9),
nand_op_parser_match_pat(9), nand_op_parser_exec_op(9),
nand_subop_get_addr_start_off(9), nand_subop_get_num_addr_cyc(9),
nand_subop_get_data_start_off(9), nand_subop_get_data_len(9),
nand_reset(9), nand_get_features(9), nand_set_features(9),
nand_read_page_raw_notsupp(9), nand_read_page_raw(9),
nand_monolithic_read_page_raw(9), nand_read_page_raw_syndrome(9),
nand_read_page_swecc(9), nand_read_subpage(9), nand_read_page_hwecc(9),
nand_read_page_hwecc_oob_first(9), nand_read_page_syndrome(9),
nand_transfer_oob(9), nand_setup_read_retry(9), nand_do_read_ops(9),
nand_read_oob_std(9), nand_read_oob_syndrome(9), nand_write_oob_std(9),
nand_write_oob_syndrome(9), nand_do_read_oob(9), nand_read_oob(9),
nand_write_page_raw_notsupp(9), nand_write_page_raw(9),
nand_monolithic_write_page_raw(9), nand_write_page_raw_syndrome(9),
nand_write_page_swecc(9), nand_write_page_hwecc(9),
nand_write_subpage_hwecc(9), nand_write_page_syndrome(9),
nand_write_page(9), nand_do_write_ops(9), panic_nand_write(9),
nand_write_oob(9), nand_erase(9), nand_erase_nand(9), nand_sync(9),
nand_block_isbad(9), nand_block_markbad(9), nand_suspend(9),
nand_resume(9), nand_shutdown(9), nand_lock(9),
rawnand_dt_parse_gpio_cs(9), nand_scan_ident(9), nand_check_ecc_caps(9),
nand_match_ecc_req(9), nand_maximize_ecc(9), nand_ecc_choose_conf(9),
nand_scan_tail(9), nand_scan_with_ids(9), nand_cleanup(9)

okay that’s the whole page, bestie — kisses from nand_unlock(9), source/version ./drivers/mtd/nand/raw, and date October 2026 🫶💖🎀