Writing I2C Sensor Kernel Modules

["Robin Müller-Bady" <mueller-bady-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>]

Hi,

this iio subsystem is a good hint.
Thank you both very much!

Regards,
Robin

Am 27.06.2013 16:57 schrieb "Sylwester Nawrocki" <s.nawrocki-Sze3O3UU22KIwRZHo2/mJg@public.gmane.orgm>:
>
> Hi,
>
> On 06/27/2013 04:33 PM, Robin Müller-Bady wrote:
> > I have a (architectural design) question about I2C drivers in kernel space.
> > Currently, I'm writing userspace software for using external sensors
> > on an raspberry pi via bcm2835's I2C bus with the help of
> > wiringPi/ioctl, e.g. the barometric pressure with the MPL115A2 sensor.
>
> AFAIK the IIO framework should be use nowadays sensors like this one.
> Unfortunately I'm not aware of any detailed documentation of this
> subsystem. This presentation [1] might be helpful.
>
> I think you could get some help asking on linux-iio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> mailing list.
>
> > I now had the idea to write the software directly in kernel space,
> > providing a device, e.g. /dev/mpl115a2, for polling the sensor data.
> > Does this idea fit into the architectural design of the I2C subsystem
> > / the sensors ? Or should code for handling I2C clients stay in
> > userspace?
> > Is there any good documentation for writing such drivers except the
> > kernel Documentation? I found some information in the kernel wiki
> > which is unfortunately not that detailed.
>
> [1] http://tinyurl.com/o6yxwrm
>
> Regards,
> Sylwester
>