sf_pdma_setup_chans(9)

💅 sf_pdma_setup_chans — like, the whole kernel-API-manual moment, bestie

okay so you found the sf_pdma_setup_chans(9) page in the Kernel API Manual and you're like "what does this even do" — don't worry, I got you 🫶 this is the init-everything function for the PDMA engine, and it's genuinely so straightforward you're gonna slay this.

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✨ NAME ✨

sf_pdma_setup_chans — init settings of each channel 💖

🌸 SYNOPSIS 🌸

void sf_pdma_setup_chans (struct sf_pdma *pdma );

🎀 ARGUMENTS 🎀

• pdma — pointer of PDMA engine. Caller should check NULL ⚠️

🦋 DESCRIPTION 🦋

So here's the vibe: this function initializes all data structure and register base. That's the whole job, no cap.

The one thing you absolutely have to do yourself — the function is literally not gonna do it for you — is make sure the pointer you pass in is non-NULL. Caller's responsibility, periodt. 🙈

And the way that this is a one-time situation? Iconic. This function should be called only one time during the device probe. Not twice. Not "eh, let me just re-run it to be safe." Once. That's the main character energy this API expects. 👑

💅 CONTEXT 💅

Any context. fr fr, any context. 🩷

⭐ RETURN ⭐

none — it gives you nothing back, and honestly? That's fine. 💀

🌈 SEE ALSO 🌈

• Kernel file ./drivers/dma/sf-pdma/sf-pdma.c
• sf_pdma_irq_init(9)

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k that's the whole page, bestie — go forth and init responsibly 🧚‍♀️

iykyk: ./drivers/dma/sf-pdma, October 2026 — mwah, that's the source/version and date, signed off with love 💜🍓