spi_nor_try_unlock_all(9)

💅 spi_nor_try_unlock_all — the kernel API manual, bestie edition

okay so picture this: it's a Kernel API Manual page, the title is spi_nor_try_unlock_all, and it's literally all about trying to unlock the whole flash memory array. yes the whole thing. no cap. 🦋

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✨ NAME ✨

spi_nor_try_unlock_all — tries to unlock the entire flash memory array. that's it, that's the whole vibe. 💅

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🌸 SYNOPSIS 🌸

void spi_nor_try_unlock_all (struct spi_nor *nor );

like, it takes one arg and returns nothing. void. no notes. ✨

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🎀 ARGUMENTS 🎀

• nor — a pointer to a struct spi_nor. that's your flash boo, the main character here. 👑

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💖 DESCRIPTION 💖

okay so here's the tea: some SPI NOR flashes come out of a power-on reset cycle already write protected by default. like they wake up with their guard UP. 🙈 and honestly? it's for a good reason — it's so you avoid inadvertent writes during power-up. nobody wants random writes happening while everything's still booting, that's giving chaos energy. 💀

but then there's backward compatibility, which basically imposes that you unlock the entire flash memory array at power-up by default. so like, we have to. it's the rules. 🤷‍♀️

now, unprotecting the entire flash array will fail for boards which are hardware write-protected. hardware said no, and hardware means it. so, because of that, any errors are ignored — that's literally why it's a "try" unlock and not a "definitely unlock". the function shoots its shot and moves on. slay behavior honestly. 🫶

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/mtd/spi-nor/swp.c — go read it, iykyk. 👀

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and that's the whole page bestie, mwah 💋 — brought to you by the ./drivers/mtd/spi-nor corner of the kernel, version-dated October 2026, Kernel API Manual energy all the way through. periodt. 🌈⭐👑