iio_dmaengin...er_setup_ext(9)

🎀 NAME 🎀

iio_dmaengine_buffer_setup_ext — literally the glow-up moment where you set up a DMA buffer for an IIO device ✨

(also hiiii, this is from the Kernel API Manual, welcome to the group chat 💅)

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🌸 SYNOPSIS 🌸

struct iio_buffer * iio_dmaengine_buffer_setup_ext (struct device *dev ,
struct iio_dev *indio_dev , const char *channel , enum
iio_buffer_direction dir );

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🦋 ARGUMENTS 🦋

• dev — the DMA channel consumer device, aka the main character doing the consuming 🫶
• indio_dev — the IIO device you're attaching this buffer to, bestie gets a whole buffer, obsessed 😭
• channel — the DMA channel name, and like, typically it's "rx" (iykyk) 💜
• dir — the direction of the buffer, either in or out, pick your vibe 🌈

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🔥 DESCRIPTION 🔥

Okay so here's the tea ☕ — this function allocates a brand-new IIO buffer using devm_iio_dmaengine_buffer_alloc and then attaches it to an IIO device with iio_device_attach_buffer. Two steps, both iconic, no cap 💅

It also appends the INDIO_BUFFER_HARDWARE mode to the supported modes of the IIO device, because your device deserves to have options, periodt 👑

Once you're done using the buffer, iio_dmaengine_buffer_teardown should be used to release it — like, actually do this, don't just ghost the buffer 🙈

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⭐ SEE ALSO ⭐

• Kernel file ./drivers/iio/buffer/industrialio-buffer-dmaengine.c — go read it, it's giving source code realness 🍓
• iio_dmaengine_buffer_alloc(9)
• iio_dmaengine_buffer_free(9)
• iio_dmaengine_buffer_teardown(9)
• devm_iio_dmaengine_buffer_setup_ext(9)
• devm_iio_dmaengine_buffer_setup_with_handle(9)

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k bye bestie, this page came from ./drivers/iio/buffer, dated October 2026, and I have to return to iio_dmaengin...er_setup_ext(9) now — slay your DMA setup for me 💖✨🧚