spi_nor_write_sr2(9)

📦 version 7.3.1, in nixpkgs unstable

💅 spi_nor_write_sr2 — the Kernel API Manual glow-up ✨

okay so bestie, welcome to spi_nor_write_sr2(9), the little kernel function whose whole entire job is writing Status Register 2. That's it. That's the vibe. 🎀

🌸 NAME 🌸

spi_nor_write_sr2 — literally writes the Status Register 2 using the SPINOR_OP_WRSR2 (3eh) command. no cap, that's the whole assignment 💖

✨ SYNOPSIS ✨

int spi_nor_write_sr2 (struct spi_nor *nor , const u8 *sr2 );

like. look at her. two args. one int coming back. iconic. 👑

🦋 ARGUMENTS 🦋

  • nor — pointer to struct spi_nor. it's giving "the flash chip's whole personality" honestly, you pass the SPI NOR struct in and she knows where she's going 🫶
  • sr2 — pointer to a DMA-able buffer holding the value you wanna write into Status Register 2. yes, DMA-able, don't forget that part, it's not optional bestie 😭

🔥 RETURN 🔥

  • 0 on success 💖
  • -errno otherwise 💀 (classic kernel behavior, fr fr)

🧚 SEE ALSO 🧚

so. the guest list for this function's little party lives in the kernel file ./drivers/mtd/spi-nor/core.c, and it is LONG, so buckle up buttercup 🌈

all sixty-two of them, present and accounted for, not a single one dropped, we do not ghost functions in this house 💅✨

lowkey remember: sr2 has to point at a DMA-able buffer. that's not me being dramatic, that's just how it is 🙈

okay that's the whole page bestie, go write yourself some Status Register 2 🌸 this masterclass in SPI NOR excellence comes courtesy of ./drivers/mtd/spi-nor, stamped October 2026 — and yes, spi_nor_write_sr2(9) is the main character of this manual, as she should be 👑💖🎀

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