Hello, I am learning how to use and write iio device drivers for ADCs. It seems most of the support is tied to FPGA based SoCs where ADCs can make use of Analog Devices SPI Engine and AXI IP. I'm looking at the AD7768-1 driver on the Analog Devices fork for example. How does one use dma buffers for generic ARM processors for an ADC attached to a dma-enabled SPI port.. for example a Beaglebone Black or Raspberry PI? Is this even possible or something that makes sense? The goal is of course to use DMA to avoid interrupting the processor for every conversion. I tried using the ADI driver, but get a ENODEV error when requesting the dma channel because there is not a "dmas" entry in the device tree node for the ADC, however it's parent SPI node does have dma entries. Thanks, Alex.
