STRUCT AMD_SPI(9)

💅 struct amd_spi(9) — like, the whole vibe

okay bestie, welcome to the Kernel API Manual, section 9, and today's main character is struct amd_spi 🎀 — the SPI driver instance. yes, that one. it's giving "small struct, big responsibilities" and honestly? we're obsessed.

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✨ NAME ✨

struct amd_spi — the SPI driver instance, fr fr 🦋

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🌸 SYNOPSIS 🌸

struct amd_spi {
    void __iomem *io_remap_addr;
    dma_addr_t phy_dma_buf;
    void *dma_virt_addr;
    enum amd_spi_versions version;
    unsigned int speed_hz;
 };

no cap, that's the entire struct. five fields. five little besties. let's meet them 💖

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👑 Members 👑

• io_remap_addr — the start address of the SPI controller registers. like, where the registers live. the address. the beginning of it. plot twist: it's a void __iomem * 😌
• phy_dma_buf — the physical address of the DMA buffer. physical, as in the real one, not the fake virtual one. iykyk 💅
• dma_virt_addr — the virtual address of the DMA buffer. yes, it's the other address for the same buffer. they're twins. siblings, if you will. 🫶
• version — the SPI controller hardware version. it's typed as enum amd_spi_versions, which lowkey is the whole reason there's a cross-reference down there 👀
• speed_hz — the device frequency. in hertz. unsigned int hertz. she's fast, she's unsigned, she's iconic ⭐

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/spi/spi-amd.h
• enum amd_spi_versions(9)

go read the enum too, bestie, it's literally right there and it's referenced by one of the members so you kind of have to. not me being a good influence for once 😭

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💀 reminder: the physical address and the virtual address are not the same thing and you cannot just swap them. do not do it. i'm begging. 🙈

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and that's the page!! mwah 🍓 this came to you from ./drivers/spi, dated October 2026, and it's struct amd_spi(9) forever and ever, periodt 💜🧚✨