micron_st_nor_read_fsr(9)

💅 micron_st_nor_read_fsr(9) 💅

okay so bestie, welcome to the Kernel API Manual — this one's a lil cutie from the SPI NOR world and honestly it's giving "small function, big responsibility" energy. We're reading a Flag Status Register. That's it. That's the whole vibe. ✨

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🌸 NAME 🌸

micron_st_nor_read_fsr — reads the Flag Status Register. literally what it says on the tin, no plot twist, no cap 🎀

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🦋 SYNOPSIS 🦋

int micron_st_nor_read_fsr (struct spi_nor *nor , u8 *fsr );

that's the whole signature, bestie. two args, one int coming back at you. slay. 💖

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✨ ARGUMENTS ✨

• nor — pointer to struct spi_nor. yeah. it's the SPI NOR thing. you know the one. 👑
• fsr — pointer to a DMA-able buffer where the value of the Flag Status Register will be written. and listen, this one's important: it should be at least 2 bytes. not 1. two. don't try to be cute and pass a tiny buffer, ok?? the DMA-able part matters too — this is not the moment for a random stack variable, iykyk 😭

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🔥 RETURN 🔥

0 on success, -errno otherwise. so like, zero means we ate, negative means something went sideways and it's handing you an errno to deal with. periodt. 💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/mtd/spi-nor/micron-st.c — go read the source, bestie, it's right there 🫶
• micron_st_nor_clear_fsr(9)
• micron_st_nor_ready(9)

those last two are the sibling functions btw, the little friend group. read them together for the full lore 📚

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ngl this page is short but every detail counts — DMA-able buffer, at least 2 bytes, 0 or -errno. no skipping. 🧚

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and that's the page! brought to you by the kernel file over in ./drivers/mtd/spi-nor, dated October 2026, under the header micron_st_nor_read_fsr(9) — mwah, love that for us 💜🍓