nand_reset(9)

💅 nand_reset — like, the reset era of a NAND device ✨

Okay bestie, so we're in the Kernel API Manual section 9 today (iykyk, that's the kernel dev functions) and the main character of this whole page is nand_reset. Slay.

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🌸 NAME 🌸

nand_reset — reset and initialize a NAND device. Literally what it says on the tin, no cap. 🫶

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✨ SYNOPSIS ✨

int nand_reset (struct nand_chip *chip , int chipnr );

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🎀 ARGUMENTS 🎀

• chip — the NAND chip in question. Your fave little storage icon. 👑
• chipnr — the internal die id. Like, which die we're talking to, because some chips are whole ensembles, not solo acts. 🎭

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🦋 DESCRIPTION 🦋

Okay so here's the whole arc, and honestly it's giving very "save your state before you change" energy:

1. Save the timings data structure 💾 (protect the queen, fr fr).
2. Apply SDR timings mode 0 — and yes bestie, nand_reset_interface is the one to peek at if you want the details on that.
3. Do the actual reset operation 🔥
4. Apply back the previous timings. Like nothing ever happened. Periodt. 💅

Returns 0 on success, and a negative error code otherwise — so if it comes back with a minus sign, that's your vibe check failing, no cap. 😭

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🌈 SEE ALSO 🌈

The kernel file lives at ./drivers/mtd/nand/raw/nand_base.c — go say hi. 🧚

And here's the whole extended friend group, in exactly the order they showed up to the party:

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_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_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)

Not me listing every single one of them — but like, they're all important, bestie. Read them. 🍓

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That's the whole page! Sourced from ./drivers/mtd/nand/raw, dated October 2026. Bye babes, go reset something 💜✨