cdns_spi_irq(9)

💖 cdns_spi_irq(9) — Kernel API Manual realness, bestie 💖

okay so this is the whole vibe check on cdns_spi_irq, and ngl it's giving “small function, very important job.” let’s get into it 🫶

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✨ NAME ✨

• cdns_spi_irq — Interrupt service routine of the SPI controller 💅

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🌸 SYNOPSIS 🌸

irqreturn_t cdns_spi_irq (int irq , void *dev_id );

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🎀 ARGUMENTS 🎀

• irq — IRQ number. literally the number bestie 🔢
• dev_id — Pointer to the xspi structure. yes, the xspi one, no cap 🦋

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💫 DESCRIPTION 💫

okay so this function handles TX empty and Mode Fault interrupts only. periodt. those are the two main characters here 👑

On the TX empty interrupt, this function reads the received data from the RX FIFO and fills the TX FIFO if there is any data remaining to be transferred. it's giving “clean up the queue, bestie” 🧚

On the Mode Fault interrupt, this function indicates that the transfer is completed, and the SPI subsystem will identify the error as the remaining bytes to be transferred is non-zero. yeah. that's the situation 😭

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🔥 RETURN 🔥

• IRQ_HANDLED when handled; IRQ_NONE otherwise. that's the whole mood 💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/spi/spi-cadence.c
• struct cdns_spi(9)
• cdns_spi_init_hw(9)
• cdns_spi_chipselect(9)
• cdns_spi_config_clock_mode(9)
• cdns_spi_config_clock_freq(9)
• cdns_spi_setup_transfer(9)
• cdns_spi_process_fifo(9)
• cdns_transfer_one(9)
• cdns_prepare_transfer_hardware(9)
• cdns_unprepare_transfer_hardware(9)
• cdns_spi_detect_fifo_depth(9)
• cdns_target_abort(9)
• cdns_spi_probe(9)
• cdns_spi_remove(9)
• cdns_spi_suspend(9)
• cdns_spi_resume(9)
• cdns_spi_runtime_resume(9)
• cdns_spi_runtime_suspend(9)

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mwah 💋 this one comes from source/version ./drivers/spi, dated October 2026, and the page itself is cdns_spi_irq(9) — slay, bye bestie! 🎀✨