nand_check_ecc_caps(9)

✨ nand_check_ecc_caps 💅

okay so this is a page from the Kernel API Manual (yes the kernel has a manual, and yes it's kind of iconic) and today's main character is nand_check_ecc_caps 🎀

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🌸 NAME 🌸

nand_check_ecc_caps — the little vibe check that makes sure your preset ECC settings are actually sane 🫶

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✨ SYNOPSIS ✨

int nand_check_ecc_caps (struct nand_chip *chip , const struct
nand_ecc_caps *caps , int oobavail );

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💖 ARGUMENTS 💖

• chip — the nand chip info structure, aka the whole personality of the chip you're checking 🦋
• caps — the ECC caps info structure, where the controller's limits live ngl
• oobavail — the OOB size that the ECC engine is allowed to use, like the budget bestie, don't go over it 💀

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🔥 DESCRIPTION 🔥

so picture this: the ECC step size and strength are already set (someone picked them, not you, don't @ me). This function rolls up and checks two things — one, are those settings actually supported by the controller? and two, do the calculated ECC bytes fit inside the chip's OOB? 👑

If everything checks out (slay), the calculated ECC bytes get set. That's it. That's the whole job. Lowkey simple, highkey important 💅

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🌈 SEE ALSO 🌈

Everything else in the NAND cinematic universe, fr fr — and the kernel file it lives in: ./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_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), nand_unlock(9), rawnand_dt_parse_gpio_cs(9), nand_scan_ident(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)

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okay bestie that's the whole page, no cap 💜 go check those ECC caps and stay sane ✨

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and that's a wrap!! brought to you by ./drivers/mtd/nand/raw, dated October 2026 — see u in the next manpage, mwah 🎀💖🦋