cdns_spi_init_hw(9)

📦 version 7.3.1, in nixpkgs unstable

✨ cdns_spi_init_hw(9) ✨

okay so this is a page straight out of the Kernel API Manual, bestie — it's cdns_spi_init_hw(9) and it's literally the glow-up routine for the SPI controller 🎀

💖 NAME 💖

cdns_spi_init_hw — initialize the hardware and configure the SPI controller. that's it, that's the whole vibe check 🌸

🦋 SYNOPSIS 🦋

void cdns_spi_init_hw (struct cdns_spi *xspi , bool is_target );

🌈 ARGUMENTS 🌈

  • xspi — a pointer to the cdns_spi structure. like, the main character struct, the one we're doing all this for 💅
  • is_target — a flag that says whether we're in target mode or host mode. pick a lane, babe ✨
  • and here's the tea on reset, no cap: the SPI controller gets configured to target or host mode. and when it's host mode? the baud rate divisor is set to 4, the threshold value for the TX FIFO not full interrupt is set to 1, and the size of the word to be transferred is 8 bit. locked in 🔥

🌸 DESCRIPTION 🌸

so what does this function actually do? it initializes the SPI controller and honestly it's giving full reset-routine energy:

  • disables and clears all the interrupts 🙈
  • enables manual target select ✅
  • enables manual start ✅
  • deselects all the chip select lines, every single one, not me being thorough 💀
  • and then enables the SPI controller 👑

periodt. that's the whole function. iconic behavior honestly 🫶

🧚 SEE ALSO 🧚

the kernel file ./drivers/spi/spi-cadence.c, plus struct cdns_spi(9), and the whole friend group:

and that's the page, bestie 💜 this one lives in ./drivers/spi, dated October 2026, and it's filed under cdns_spi_init_hw(9) — go slay some SPI transfers, ily 🎀⭐

📦 where this page comes from