omap_write_subpage_bch(9)

✨ omap_write_subpage_bch(9) ✨

okay bestie, so this is a page out of the Kernel API Manual — yes, that Kernel API Manual — and it's about omap_write_subpage_bch, which is the BCH hardware ECC based subpage write. lowkey iconic behaviour. 💅

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🎀 SYNOPSIS 🎀

int omap_write_subpage_bch (struct nand_chip *chip , u32 offset , u32
       data_len , const u8 *buf , int oob_required , int page );

like, that's the whole summoning circle. copy it exactly, no cap, don't be out here renaming things. 🫶

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🌸 ARGUMENTS 🌸

• chip — the nand chip info structure. the main character of this whole operation ngl 💖
• offset — column address of the subpage within the page. yes, within the page, she's specific ✨
• data_len — data length. that's it, that's the vibe check 🦋
• buf — data buffer. where the actual bytes are chilling 🍓
• oob_required — you must write chip->oob_poi to OOB. must. not "should", not "if u feel like it". must 👑
• page — page number to write, iykyk 🔥

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🧚 DESCRIPTION 🧚

so basically: this is the OMAP optimized subpage write method. that's the whole thing, bestie — optimized, subpage, write, OMAP. she does one job and she ate 💀✨

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🌈 SEE ALSO 🌈

first up, the kernel file: ./drivers/mtd/nand/raw/omap2.c

and then the whole friend group, fr fr:

• omap_prefetch_enable(9)
• omap_nand_data_in_pref(9)
• omap_nand_data_out_pref(9)
• omap_nand_data_in_dma_pref(9)
• omap_nand_data_out_dma_pref(9)
• gen_true_ecc(9)
• omap_compare_ecc(9)
• omap_correct_data(9)
• omap_calculate_ecc(9)
• omap_enable_hwecc(9)
• omap_enable_hwecc_bch(9)
• _omap_calculate_ecc_bch(9)
• omap_calculate_ecc_bch_sw(9)
• omap_calculate_ecc_bch_multi(9)
• erased_sector_bitflips(9)
• omap_elm_correct_data(9)
• omap_write_page_bch(9)
• omap_read_page_bch(9)
• is_elm_present(9)

like, an entire group chat. go say hi 💜

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and that's the page!! mwah 💋

sign-off time: this one lives in ./drivers/mtd/nand/raw, and it's stamped October 2026 — so yeah, she's from the future, we don't question it 🦋🌸💖