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 _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
