Re: Kernel wishlist item: Better IIO API

[Lars-Peter Clausen <lars@metafoo.de>]

On 10/29/2014 03:30 PM, Bastien Nocera wrote:
> Hey,
>
> I've posted this a couple of days ago:
> http://www.hadess.net/2014/10/a-gnome-kernel-wishlist.html
> along with a mail to LKML:
> http://thread.gmane.org/gmane.linux.kernel/1810083
>
> I've recently added to my list an item about IIO:
> https://wiki.gnome.org/BastienNocera/KernelWishlist
>
> Are there any plans for a better API for the IIO subsystem? The API
> might be good enough to drive from shell scripts, or helpers that only
> need to work with one variant of a device, but my attempts at trying to
> use the IIO subsystem to provide an accelerometer to do automatic
> display rotation[1] showed that the API is really cumbersome.
>
> The code I wrote spends most of its time creating sysfs paths, reading
> values in different formats, and mangling filenames[2].
>
> Is an ioctl-based API planned? Something where I could get/set
> structures to gather metadata about the device, and set it up easily, so
> reading data from it is easier?

No, unfortunately not and I'm not sure if such a ABI would be accepted if 
proposed.

But checkout libiio[1][2], it hides the details of the sysfs file manipulation.

- Lars

[1] https://github.com/analogdevicesinc/libiio
[2] http://analogdevicesinc.github.io/libiio/