nand_write_subpage_hwecc(9)

💅 nand_write_subpage_hwecc(9) — like, the hardware ECC based subpage write one 🎀

okay so this page lives in the Kernel API Manual, bestie, and it's literally all about [REPLACEABLE] hardware ECC based subpage write. yes the square brackets are part of the vibe — it means replaceable, iykyk 🦋

✨ SYNOPSIS ✨

int nand_write_subpage_hwecc (struct nand_chip *chip , uint32_t offset ,
uint32_t data_len , const uint8_t *buf , int oob_required , int page );

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

🌸 ARGUMENTS 🌸

• chip — the nand chip info structure 🫶 like, the whole personality of the flash chip you're writing to.
• offset — the column address of the subpage within the page. so, which slice of the page we're talking about ✨
• data_len — data length, aka how much data. that's it, that's the number 📏
• buf — the data buffer. this is where your actual bytes are chillin' 🧚
• oob_required — must write chip->oob_poi to OOB. yes, the parameter is literally telling you the OOB has to be written 💅
• page — the page number to write 📄 main character page energy fr fr

ngl, this one's a callback-style function, so if you're actually calling it yourself, double-check your chip pointer before you do anything feral 😭

👑 SEE ALSO 👑

bestie the cross-reference list here is unhinged in the best way — it's giving "the whole nand subsystem showed up to the group chat". kernel file: ./drivers/mtd/nand/raw/nand_base.c 🌈

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_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), nand_unlock(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)

slay, you made it to the end of the list 💀🔥

mmm okay that's the whole page !! go read the source, drink some water, and remember: hardware ECC subpage writes are iconic and so are you 💜

🧚 this cutie came out of ./drivers/mtd/nand/raw, dated October 2026, and it's part of the Kernel API Manual — catch you in the next one, bestie 🎀