cdns_spi_runtime_resume(9)

📦 version 7.3.1, in nixpkgs unstable

✨ cdns_spi_runtime_resume ✨

ok so this is a page from the Kernel API Manual, bestie — it's cdns_spi_runtime_resume(9), and it's genuinely so short you could read it in the time it takes to microwave a bagel 🥯 but we're gonna give it the full main-character treatment anyway 💅

🌸 NAME 🌸

cdns_spi_runtime_resume — the runtime resume method for the SPI driver 🫶

like, when the SPI driver has been chilling in runtime-suspend and it needs to wake back up? this is the function that gets called. no cap.

🦋 SYNOPSIS 🦋

int cdns_spi_runtime_resume (struct device *dev );

that's it. that's the whole signature. one argument, returns an int. iconic minimalism honestly 💀

🎀 ARGUMENTS 🎀

  • dev — the address of the platform_device structure 📍 (yes bestie, an address — we're handing over a pointer, not a whole struct, don't come for me)

🌈 DESCRIPTION 🌈

ok so the entire personality of this function is:

it enables the clocks ⏰✨

that's the whole description. that's literally all the original says. it turns the clocks on. the way that this manpage gives us one (1) sentence and expects us to move on 😭

so yeah — runtime resume, clocks enabled, we're back in business 🔥

💜 RETURN 💜

  • 0 on success — slay, we resumed 👑
  • an error value on error — not slay, something went wrong 😔

so like, check your return value, bestie. 0 good, anything else = go look at what broke 🙈

⭐ SEE ALSO ⭐

ok this is the part where the page pops off — huge friend group energy, everybody's here 🎉 the kernel file is ./drivers/spi/spi-cadence.c, and these are all the siblings and cousins:

iykyk — the runtime_suspend one is literally this function's opposite twin 🧚 and the non-runtime cdns_spi_suspend / cdns_spi_resume are the vibes-adjacent cousins. go read them all, fr fr 📚

💡 little note from me to you: the page lists the kernel source location as ./drivers/spi, so if you're lost in the tree, that's where you start looking 🍓

ok that's the whole page, bestie — short and sweet, just how the kernel likes it 💖

this lil writeup came out of the Kernel API Manual, tied to the source over in ./drivers/spi, dated October 2026, and it's filed under cdns_spi_runtime_resume(9) — mwah, go enable some clocks for me 🌸💅✨

📦 where this page comes from