STRUCT ZYNQMP_QSPI(9)

📦 version 7.3.1, in nixpkgs unstable

💅 struct zynqmp_qspi (9) — Kernel API Manual, but make it cute ✨

okay so bestie, we're deep in the kernel docs rn — this one's from the Kernel API Manual shelf, and it's literally the entire personality of the qspi driver in one struct 🦋

🌸 NAME 🌸

struct zynqmp_qspi — no cap, this is the struct that defines the qspi driver instance. it's giving "whole driver's whole life in one place" energy 👑

✨ SYNOPSIS ✨

here's the whole thing, and yes you gotta keep every single field exactly as written, i don't make the rules (i do, but still):

struct zynqmp_qspi {
    struct spi_controller *ctlr;
    void __iomem *regs;
    struct clk *refclk;
    struct clk *pclk;
    int irq;
    struct device *dev;
    const void *txbuf;
    void *rxbuf;
    int bytes_to_transfer;
    int bytes_to_receive;
    u32 genfifocs;
    u32 genfifobus;
    u32 dma_rx_bytes;
    dma_addr_t dma_addr;
    u32 genfifoentry;
    enum mode_type mode;
    struct completion data_completion;
    struct mutex op_lock;
    u32 speed_hz;
    bool has_tapdelay;
 };

slay, now let's meet the members 🫶

🎀 Members 🎀

  • ctlr — pointer to the spi controller information. yes queen, this is the controller hookup 💖
  • regs — the virtual address of the QSPI controller registers. this is where the hardware lives in your address space 🏠
  • refclk — pointer to the peripheral clock ⏰
  • pclk — pointer to the APB clock ⏰✨
  • irq — the IRQ number. interrupts incoming, bestie 🔥
  • dev — pointer to struct device 🧚
  • txbuf — pointer to the TX buffer 📤
  • rxbuf — pointer to the RX buffer 📥
  • bytes_to_transfer — number of bytes left to transfer. ticking down like a countdown 😭
  • bytes_to_receive — number of bytes left to receive. same energy, other direction 🙈
  • genfifocs — used for chip select 🎯
  • genfifobus — used to select the upper or lower bus 🛣️
  • dma_rx_bytes — remaining bytes to receive by DMA mode. DMA said "i'll take it from here" 💀
  • dma_addr — the DMA address after mapping the kernel buffer 🗺️
  • genfifoentry — used for storing the genfifoentry instruction. literally in the name, iykyk ✨
  • mode — defines the mode in which QSPI is operating, type enum mode_type 🎛️
  • data_completion — completion structure. it's the "wait for it… wait for it…" girlie ⏳
  • op_lock — operational lock. one at a time, bestie, no cutting the line 🔒
  • speed_hz — current SPI bus clock speed in hz ⚡
  • has_tapdelay — used for tapdelay register available in qspi. a whole bool for the vibe check ✅

🦋 SEE ALSO 🦋

the kernel file, and then like… the entire extended friend group of functions, all here, all icons 👑:

Kernel file ./drivers/spi/spi-zynqmp-gqspi.c struct

fr fr, if you're poking at this struct you're already deep in ./drivers/spi territory, so good luck and hydrate 💧

and that's the page bestie — source path ./drivers/spi, dated October 2026 in the footer, struct zynqmp_qspi(9) the whole way through. mwah 💋 periodt. 🌈✨

📦 where this page comes from