Lars, I have few more questions, would love if you could answer. - ADC I have uses max 4KHz sampling frequency, SoC CPU is 533MHz; will IIO cope? - are there any other ADCs in IIO framework that use your DMA-extension? - I would like to use dw_dmac DMA driver, I hope both, IIO and your DMA-extension will honour that - what is the status of upstreaming DMA-extension? Are you commited to any dates? - is there any out of the box set of tests for IIO/DMA-extension? Thanks, Krzysztof Sywula > On 07/24/2014 03:06 PM, Krzysztof Sywula wrote: >> Hi there, I?m designing a PCIe driver for DMA enabled ADC. Is IIO >> handling >> such a combo? I'm based on kernel 3.8.7. >> >> Website: >> http://wiki.analog.com/software/linux/docs/iio/iio >> says "However typical DMA operated devices such as ones connected to a >> high speed synchronous serial (McBSP, SPORT) or high speed synchronous >> parallel (EPI, PPI) or FPGA peripherals are also subject to this >> subsystem." >> >> which is not clear enough for me to answer that question. > > > Hi, > > The current upstream version of IIO does not have built-in support for > DMA, > but you can always create your custom buffer implementation that handles > the > DMA. > > There is a out of tree generic DMA[0] and DMAengine[1] support for IIO. > This > is both scheduled for mainline submission, but obviously will not be > available in a 3.8.7 kernel. > > - Lars > > [0] > https://github.com/analogdevicesinc/linux/blob/xcomm_zynq/drivers/iio/industrialio-dmabuf.c > [1] > https://github.com/analogdevicesinc/linux/blob/xcomm_zynq/drivers/iio/industrialio-dmaengine.c > > -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
