spi_nor_otp_lock_sr2(9)

💅 spi_nor_otp_lock_sr2(9) — like, the lock the OTP region era 🎀

okay so bestie, we're in the Kernel API Manual today and the main character is spi_nor_otp_lock_sr2. yes it's a mouthful, yes it ate, let's get into it 💖

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✨ SYNOPSIS ✨

int spi_nor_otp_lock_sr2 (struct spi_nor *nor , unsigned int region );

like… that's the whole vibe. two args, one int coming back at you 🦋

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🌸 ARGUMENTS 🌸

• nor — pointer to struct spi_nor. your flash friend, the whole reason we're here 🫶
• region — the OTP region. the specific little zone we're about to lock up 🔒

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💫 DESCRIPTION 💫

So what does it do? It locks the OTP region by writing the status register-2. that's it, that's the assignment, and it slays 💅

It's the method used on GigaDevice and Winbond flashes — so if you're on one of those, this is literally your girl ✨

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🔥 RETURN 🔥

• 0 on success — we love a win 💖
• -errno otherwise — tragic, but at least it tells you why 😭

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🧚 SEE ALSO 🧚

Sibling functions, all iconic, all in the kernel file ./drivers/mtd/spi-nor/otp.c:

• spi_nor_otp_read_secr(9)
• spi_nor_otp_write_secr(9)
• spi_nor_otp_erase_secr(9)
• spi_nor_otp_is_locked_sr2(9)

go read those too, iykyk 👑

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ngl bestie, this one's short and sweet — but it's doing exactly what it says on the tin, no cap 🍓

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and that's the tea ☕ — brought to you by the fine folks over at ./drivers/mtd/spi-nor, October 2026, mwah 💋🌈