davinci_spi_get_prescale(9)

💅 davinci_spi_get_prescale(9) 💅

okay so bestie, welcome to the Kernel API Manual ✨ this one's a little function out of ./drivers/spi/spi-davinci.c and honestly? she's iconic, she's doing math so you don't have to, and she's about to tell you exactly how to slow your SPI clock down. let's get into it 🎀

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✨ NAME ✨

davinci_spi_get_prescale — literally calculates the correct prescale value 🧮💖

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🌸 SYNOPSIS 🌸

int davinci_spi_get_prescale (struct davinci_spi *dspi , u32
max_speed_hz );

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🦋 ARGUMENTS 🦋

• dspi — the controller data 🫶 like, the whole vibe of the SPI controller, packaged up.
• max_speed_hz — the maximum rate the SPI clock can run at ⏱️ the speed limit, basically. don't exceed it, she won't let you.

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👑 DESCRIPTION 👑

so what does she actually do? this function calculates the prescale value that generates a clock rate less than or equal to the specified maximum 🔥 that's it, that's the whole job, and she does it flawlessly. no cap.

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⭐ RETURN ⭐

she hands you back the calculated prescale value — ready for easy programming into SPI registers, periodt 💅 — or, if a valid prescalar cannot be updated, a negative error number 😭 which is her way of saying "bestie, no."

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/spi/spi-davinci.c
• struct davinci_spi_platform_data(9)
• struct davinci_spi_config(9)
• davinci_spi_setup_transfer(9)
• davinci_spi_setup(9)
• davinci_spi_process_events(9)
• davinci_spi_bufs(9)
• dummy_thread_fn(9)
• davinci_spi_irq(9)
• spi_davinci_get_pdata(9)
• davinci_spi_probe(9)
• davinci_spi_remove(9)

like, go read her friends too, they're all in the same friend group 🫶✨

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and that's the whole page, bestie 💖 this gem lives over in ./drivers/spi and it's dated October 2026 — go forth and prescale responsibly, mwah 🎀🌷💅