spi_nor_parse_smpt(9)

💅 spi_nor_parse_smpt(9) — the Kernel API Manual glow-up 🎀

okay so bestie, welcome to spi_nor_parse_smpt(9) from the Kernel API Manual (section 9, obvs) — this is the little function that reads the Sector Map Parameter Table and, like, actually tells you where stuff lives in your flash chip. no cap, it's a whole vibe. ✨

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🌸 NAME 🌸

spi_nor_parse_smpt — parse Sector Map Parameter Table 🗺️

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✨ SYNOPSIS ✨

int spi_nor_parse_smpt (struct spi_nor *nor , const struct
sfdp_parameter_header *smpt_header );

like, yes, the line break is real, that's literally how it's written, don't @ me 🫶

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🎀 ARGUMENTS 🎀

• nor — pointer to a struct spi_nor 💖 like, the whole flash device energy
• smpt_header — the sector map parameter table header 👑

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🦋 DESCRIPTION 🦋

so here's the tea 🍓: this table is optional — it doesn't have to be there, it's not required, it's giving "if you know you know" — but when it is available? we parse it. periodt.

and what do we get from parsing it?? two iconic things:

1. we identify the location and the size of the sectors within the main data array of the flash memory device 📍
2. we identify which Erase Types are supported by each sector 🔥

that's it, that's the whole slay. it's a small function with main character energy. 💅

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🌈 RETURN 🌈

• 0 on success — we ate, no crumbs 🍽️
• -errno otherwise — not me crying in errno 😭

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⭐ SEE ALSO ⭐

okay this list is LONG but every single one of these is a baddie, we're not skipping a single one, i would never 🙈

Kernel file ./drivers/mtd/spi-nor/sfdp.c —

• spi_nor_read_raw(9)
• spi_nor_read_sfdp(9)
• spi_nor_read_sfdp_dma_unsafe(9)
• spi_nor_set_erase_settings_from_bfpt(9)
• spi_nor_map_cmp_erase_type(9)
• spi_nor_sort_erase_mask(9)
• spi_nor_regions_sort_erase_types(9)
• spi_nor_parse_bfpt(9)
• spi_nor_smpt_addr_nbytes(9)
• spi_nor_smpt_read_dummy(9)
• spi_nor_get_map_in_use(9)
• spi_nor_region_check_overlay(9)
• spi_nor_init_non_uniform_erase_map(9)
• spi_nor_parse_4bait(9)
• spi_nor_parse_profile1(9)
• spi_nor_parse_sccr(9)
• spi_nor_parse_sccr_mc(9)
• spi_nor_post_sfdp_fixups(9)
• spi_nor_check_sfdp_signature(9)
• spi_nor_parse_sfdp(9)

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💀 tiny reminder bestie: this table is optional, so if it's missing that's not a bug, that's just the flash chip choosing not to share. respect its boundaries. 🫶

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and that's the page!! sourced from ./drivers/mtd/spi-nor, dated October 2026, manual name Kernel API Manual — mwah, go read some SFDP specs, ily, bye 💜🧚‍♀️