IIO and high speed

IIO and high speed

[Phil Reid]

G'day All,

I'm just enquiring what the status / plans are for the IIO high speed interface.

This code is present in libiio to do zero copy operations using IIO_BLOCK* ioctls.
EG: I get a warning when running iio_readdev about high speed not being enabled.

However corresponding code is not in the mainline kernel, I did find something at:
https://github.com/analogdevicesinc/linux.git

Or has this line of development been discontinued in favour of another plan.
It looks to be a few years old.


-- 
Regards
Phil Reid

Re: IIO and high speed

[Lars-Peter Clausen]

On 12/16/2015 04:58 AM, Phil Reid wrote:
> G'day All,
> 
> I'm just enquiring what the status / plans are for the IIO high speed
> interface.
> 
> This code is present in libiio to do zero copy operations using IIO_BLOCK*
> ioctls.
> EG: I get a warning when running iio_readdev about high speed not being
> enabled.
> 
> However corresponding code is not in the mainline kernel, I did find
> something at:
> https://github.com/analogdevicesinc/linux.git
> 
> Or has this line of development been discontinued in favour of another plan.
> It looks to be a few years old.

Phase 1, which is DMA buffer support, of the high-speed support was merged
recently. Phase 2, which is mmap and IOCTL support, will follow soon-ish. It
will see some rework first though, support for multiple data planes,
metadata buffers, etc.

- Lars