devm_iio_dm...er_setup_ext(9)

🌸 devm_iio_dmaengine_buffer_setup_ext(9) 🌸

okay bestie, welcome to the Kernel API Manual 💖 this one's a lil function that sets up a DMA buffer for an IIO device, and honestly? she's giving behind-the-scenes main character energy 🎀

---

✨ NAME ✨

devm_iio_dmaengine_buffer_setup_ext — Setup a DMA buffer for an IIO device 🦋

---

✨ SYNOPSIS ✨

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

---

✨ ARGUMENTS ✨

• dev — the device that owns this whole devm situation 💅 she's also the DMA channel consumer device, so like, double duty, iconic
• indio_dev — the IIO device you're attaching this buffer to 🫶 that's her home now
• channel — the DMA channel name, and typically it's "rx" 📥
• dir — the direction of the buffer, so like, in or out 🧭

---

✨ DESCRIPTION ✨

so what she actually does: she allocates a brand new IIO buffer with devm_iio_dmaengine_buffer_alloc ⭐ and then attaches it to an IIO device with iio_device_attach_buffer 🔗

and that's not all, because she is an overachiever 💅 she also appends the INDIO_BUFFER_HARDWARE mode to the supported modes of the IIO device 👑

---

✨ SEE ALSO ✨

• Kernel file ./drivers/iio/buffer/industrialio-buffer-dmaengine.c 📁
• iio_dmaengine_buffer_alloc(9)
• iio_dmaengine_buffer_free(9)
• iio_dmaengine_buffer_teardown(9)
• iio_dmaengine_buffer_setup_ext(9)
• devm_iio_dmaengine_buffer_setup_with_handle(9)

---

okay that's the whole page, no cap 🌈 this one came out of ./drivers/iio/buffer, dated October 2026, and honestly? she ate 💖✨ go set up some buffers bestie, you got this 🫶🎀