spi_nor_write_sr_and_check(9)

📦 version 7.3.1, in nixpkgs unstable

💅 spi_nor_write_sr_and_check — from the Kernel API Manual, bestie

okay so picture this: we're in the kernel, we're in the SPI NOR flash zone, and we need to write Status Register 1 and then actually make sure it stuck. That's the whole gig. This function writes Status Register 1 and guarantees the byte we wrote matches the value the chip sent back — and it does all of that without touching the other bits in Status Register 1 and 2. No collateral damage, no drama. 👑

✨ SYNOPSIS ✨

int spi_nor_write_sr_and_check (struct spi_nor *nor , u8 sr1 );

🎀 ARGUMENTS 🎀

  • nor — pointer to a struct spi_nor. Your ride, your flash context, your main character. 🦋
  • sr1 — the byte value to be written to the Status Register. That's the actual content going in, so choose it thoughtfully bestie 💖

🌸 RETURN 🌸

0 on success, -errno otherwise. So if it comes back 0, we slayed. Anything negative? That's the kernel handing you an error code, go read it. 😭

🔥 SEE ALSO 🔥

The manpage is literally hosted in the Kernel file ./drivers/mtd/spi-nor/core.c, and wow, the friend group is large. Here's everyone:

💀 real talk: read the return value. 0 means the byte matched and the bits stayed untouched. -errno means something went sideways and you should go find out what. don't just ignore it and hope. 🙈

okay that's the whole page, no notes. this little gem lives over in ./drivers/mtd/spi-nor, dated October 2026, and it's the spi_nor_write_sr_and_check(9) entry from the Kernel API Manual. go forth and write your status registers responsibly, bestie 🫶✨🎀

📦 where this page comes from