UIO driver test

[greg@kroah.com (Greg KH)]

On Fri, Apr 15, 2016 at 01:59:12PM +0530, Gadre Nayan wrote:
> Dear all,
> 
> I am trying to test a dummy UIO driver to get timer interrupt events
> in Userspace.
> 
> I register the UIO driver as a platform driver:
> 
> static struct platform_device *uio_dummy_device;
> 
> static struct device_driver uio_dummy_driver = {
>         .name           = "uio_dummy",
>         .bus            = &platform_bus_type,
>         .probe          = uio_dummy_probe,
>         .remove         = uio_dummy_remove,
>         .shutdown       = uio_dummy_shutdown,
> };
> 
> /*
>  * Main initialization/remove routines
>  */
> static int __init uio_dummy_init(void)
> {
>         printk("uio_dummy_init( )\n" );
>         uio_dummy_device = platform_device_register_simple("uio_dummy", -1,
>                                                            NULL, 0);

Why are you using a platform driver and device on x86?  That's not going
to work at all, as your device doesn't have an irq.  Please use this on
a "real" device that has an interrupt assigned to it.

hope this helps,

greg k-h