Re: UIO and Fedora 13 (kernel 33.6)

[Armin Steinhoff]

 Hans J. Koch wrote:
> On Mon, Aug 30, 2010 at 12:49:10PM +0200, Armin Steinhoff wrote:
> >   Hi,
> >
> > I'm writing an UIO driver for a plain PC/104 board (ISA bus).
> > After insmod<my_driver_mod>  I don't see an entry of uio0 in /dev
> > and also no entries in /sys/class. There are no error messages at
> > module load.
> Are you sure your probe() function is called?
  That's the case.

>   After a successfull
> uio_register_device() there is both a /dev/uioX and a directory
> /sys/class/uio/uioX/.
  Seems not be possible after a kernel ooops ...
> > The same happens after loading the module uio.ko and uio_pdrv.ko ...
> > no entries at all, no error messages.
> > uio_pdrv needs platform data set up somewhere, did you do that?
> > See docs in Documentation/DocBook/ for more details.

  uio_pdrv.ko was provided unmodified and precompiles by the Fedora 
distro.
  This example seems more or less incomplete ... it seems also the case 
with the uio_pdrv_genirq example

  However, it seems so I have to go back 2 steps and restart after 
reading  more details of the concept of platform devices ...

  Thanks

  --Armin



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