From: Lars-Peter Clausen <lars@metafoo.de>
To: Krzysztof Sywula <krzysztof.m.sywula@linux.intel.com>,
linux-iio@vger.kernel.org
Subject: Re: IIO for PCIe-DMA ADC
Date: Thu, 24 Jul 2014 17:11:04 +0200 [thread overview]
Message-ID: <53D12208.9030500@metafoo.de> (raw)
In-Reply-To: <61739.163.33.230.161.1406207197.squirrel@linux.intel.com>
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
next prev parent reply other threads:[~2014-07-24 15:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-24 13:06 IIO for PCIe-DMA ADC Krzysztof Sywula
2014-07-24 15:11 ` Lars-Peter Clausen [this message]
2014-07-28 11:09 ` Krzysztof Sywula
2014-07-28 11:48 ` Lars-Peter Clausen
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