zynq_qspi_irq(9)

📦 version 7.3.1, in nixpkgs unstable

zynq_qspi_irq(9) 💅✨

Okay bestie, so this one's from the Kernel API Manual and it's literally the main character energy of the QSPI controller's interrupt game. We're talking zynq_qspi_irq — the interrupt service routine that handles the vibe check when hardware comes knocking. No cap, this function is out here doing the absolute most with the bare minimum, and I'm obsessed. 🎀

✨ SYNOPSIS ✨

irqreturn_t zynq_qspi_irq (int irq , void *dev_id );

Like, that's the whole signature. Iconic. Periodt. 🫶

🌸 ARGUMENTS 🌸

  • irq — the IRQ number, aka the literal interrupt ID sliding into the function. It's giving "who dis" but make it hardware. 🔥
  • dev_id — a pointer to the xqspi structure, lowkey the VIP pass that lets this function know which controller it's dealing with. Ngl, it's the friend that remembers everyone's names at the party. 💜

🦋 DESCRIPTION 🦋

So here's the tea, bestie: this function handles TX empty only. That's it. That's the whole job description. 💀

On a TX empty interrupt, this function reads the received data from the RX FIFO and fills the TX FIFO if there's any data remaining to be transferred. It's literally the ultimate multitasker — emptying one queue while feeding the other, like a barista who's also doing inventory. The way that it keeps the data flowing is honestly highkey impressive. ☕✨

No extra drama, no side quests, just pure FIFO management main character energy. 🌈

👑 RETURN 👑

  • IRQ_HANDLED — when the interrupt is handled, aka the slay case. The function did its thing and it ate. 💅
  • IRQ_NONE — otherwise, aka the "not me, not my problem" case. 🫠

🧚 SEE ALSO 🧚

Okay so the lore goes deep, and you're gonna want to check out the whole friend group over at Kernel file ./drivers/spi/spi-zynq-qspi.c:

The whole squad is there, iykyk. 💖

Heads up bestie: this page is living its best life in ./drivers/spi and it's dated October 2026 — so yeah, mark your calendars, the future is now. 🗓️✨

Stay slay, keep your FIFOs full (or empty, depending on the interrupt), and remember: the kernel loves you back. 🎀💜🌸

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