On 08/13/2014 06:40 PM, Greg KH wrote: > On Wed, Aug 13, 2014 at 09:46:51AM -0300, Daniel Hilst Selli wrote: >> One last question, supposing I need to create multiple /dev nodes, do I need to >> allocate one struct cdev for each major:minor pair (cdev_alloc(), cdev_init(), cdev_add())? > > No, you can allocate multiple minor numbers with a single set of cdev > calls. But watch out, you also need to create a 'struct device' for > _each_ minor number you are actually using if you want the device nodes > to show up in /dev automatically. > > Yeah, it's a pain, sorry, but this way you can allocate a whole range of > major:minor pairs but don't actually expose them to userspace until you > really need them (i.e. the hardware is present in the system.) This > keeps /dev looking like only the devices that are present in the system, > not the "old" way of "every possible device that could ever be possibly > present". > > Hope this helps, > > greg k-h > It help-me alot Greg, thanks.. At last I know I'm doing in the right way :) Cheers, _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
