do_otp_read(9)

💅 do_otp_read(9) — bestie, it's a kernel API manual moment

okay so this one lives in the Kernel API Manual, section 9, and honestly? It's short, it's sweet, and it does exactly one thing. Let's get into it 🎀

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✨ NAME ✨

do_otp_read — oh and it's tagged [DEFAULT], cute — this one reads the OTP block area. That's the whole personality. 💅

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🌸 SYNOPSIS 🌸

int do_otp_read (struct mtd_info *mtd , loff_t from , size_t len ,
size_t *retlen , u_char *buf );

Five arguments, one int coming back at you. Iconic signature, no notes. ✨

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🦋 ARGUMENTS 🦋

• mtd — the MTD device structure. like, the actual device you're talking to, bestie 🫶
• from — the offset to read from. where we're starting, iykyk
• len — how many bytes you want to read. be normal about it 💀
• retlen — a pointer to a variable that'll hold the number of bytes actually read. yes, pointer — she wants to write back to you 🎀
• buf — the data buffer where the data gets put (or got from). the vibes-holder 🌈

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💖 DESCRIPTION 💖

Read OTP block area 💅

that's it. that's the description. she's concise, she's confident, she ate and left zero crumbs. 🔥

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👑 SEE ALSO 👑

This is where it gets iconic — she has SO many friends. The kernel file you want is ./drivers/mtd/nand/onenand/onenand_base.c, and it's all family from there:

onenand_readw(9), onenand_writew(9), onenand_block_address(9), onenand_bufferram_address(9), onenand_page_address(9), onenand_buffer_address(9), flexonenand_block(9), flexonenand_addr(9), onenand_get_density(9), flexonenand_region(9), onenand_command(9), onenand_read_ecc(9), onenand_wait(9) — that's the first little squad, the addressing-and-command girlies 🧚

onenand_bufferram_offset(9), onenand_read_bufferram(9), onenand_sync_read_bufferram(9), onenand_write_bufferram(9), onenand_get_2x_blockpage(9), onenand_check_bufferram(9), onenand_update_bufferram(9), onenand_invalidate_bufferram(9), onenand_get_device(9), onenand_release_device(9) — bufferram crew, you know the vibes 🍓

onenand_transfer_auto_oob(9), onenand_recover_lsb(9), onenand_mlc_read_ops_nolock(9), onenand_read_ops_nolock(9), onenand_read_oob_nolock(9), onenand_read_oob(9), onenand_bbt_wait(9), onenand_bbt_read_oob(9), onenand_verify_oob(9), onenand_verify(9), onenand_panic_write(9) — read/verify gang, plus the OOB besties ⭐

onenand_fill_auto_oob(9), onenand_write_ops_nolock(9), onenand_write_oob_nolock(9), onenand_write_oob(9), onenand_block_isbad_nolock(9), onenand_multiblock_erase(9), onenand_block_by_block_erase(9), onenand_erase(9), onenand_sync(9), onenand_block_isbad(9), onenand_default_block_markbad(9), onenand_block_markbad(9) — the write & erase delegation, highkey busy 💜

onenand_do_lock_cmd(9), onenand_lock(9), onenand_unlock(9), onenand_check_lock_status(9), onenand_unlock_all(9), onenand_otp_command(9), onenand_otp_write_oob_nolock(9), do_otp_write(9), do_otp_lock(9), onenand_otp_walk(9) — lock and OTP hive, our direct nepo-friends 💅

onenand_get_fact_prot_info(9), onenand_read_fact_prot_reg(9), onenand_get_user_prot_info(9), onenand_read_user_prot_reg(9), onenand_write_user_prot_reg(9), onenand_lock_user_prot_reg(9), onenand_check_features(9), onenand_print_device_info(9), onenand_check_maf(9), flexonenand_get_boundary(9), flexonenand_get_size(9), flexonenand_check_blocks_erased(9) — protection-region + flexonenand representation 🌸

onenand_chip_probe(9), onenand_probe(9), onenand_suspend(9), onenand_resume(9), onenand_scan(9), onenand_release(9) — and the lifecycle icons close us out. periodt. 🔥

fr fr that's the entire list — do not skip a single name, the kernel does not do "close enough" 🙈

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🌈 a lil sign-off 🌈

This page comes to you from ./drivers/mtd/nand/onenand, dated October 2026, and stars do_otp_read(9) one more time for the cheap seats. take care of her, she's just a read function doing her best 💖✨🎀