spinand_wait(9)

💅 spinand_wait(9) — or, how to stalk a memory device until it's ready

okay so bestie, welcome to the Kernel API Manual 🎀 and today's main character is spinand_wait(9). yes it's a function, yes it's in the kernel, yes we're gonna understand it. no cap.

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✨ NAME ✨

spinand_wait — the little function that polls a memory device's status until it's done vibing. it's giving "are we there yet" but make it kernel-space 🦋

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🌸 SYNOPSIS 🌸

int spinand_wait(struct spinand_device *spinand, unsigned long
                 initial_delay_us, unsigned long poll_delay_us, u8 *s);

four args, one int coming back, let's go 💖

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🫶 ARGUMENTS 🫶

• spinand — the spinand device in question. the star of the show 👑
• initial_delay_us — delay in us before it even starts polling. like a little warm-up nap first 😴
• poll_delay_us — how long it sleeps between reads, in us. yes it naps between checks, we love a healthy boundary
• s — the pointer to the variable where the value of REG_STATUS gets stored. hold my data 📥

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💀 DESCRIPTION 💀

so what does it actually do? it polls a status register (REG_STATUS) and returns when the STATUS_READY bit is 0 — or when the timeout has expired. that's it. that's the whole vibe check 🧚

fr fr, it bounces on two conditions: STATUS_READY goes 0, or time runs out. either way, you're getting a return 💅

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⭐ RETURN ⭐

• 0 on success 🎉
• a negative error code otherwise 😭 (so like, check it, bestie)

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/mtd/nand/spi/core.c
• spinand_upd_cfg(9)
• spinand_select_target(9)
• spinand_read_page(9)
• spinand_write_page(9)
• spinand_match_and_init(9)

go read those too, they're all connected, iykyk 🔥

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and that's the page, bestie 💜 this icon was brought to you by ./drivers/mtd/nand/spi, October 2026, and spinand_wait(9) — periodt ✨🎀🦋