On Tue, Feb 10, 2009 at 09:08:14PM +0200, Daniel Baluta wrote: > On Tue, Feb 10, 2009 at 6:18 PM, Greg KH <greg@xxxxxxxxx> wrote: > > On Tue, Feb 10, 2009 at 11:52:58AM +0200, Daniel Baluta wrote: > >> Led class seems to be a very good idea. > > > > Good. > > > >> The idea is that i want to dynamically create /dev/hexd in order to > >> write to my hexdisplay. > > > > But the led class uses sysfs, not a device node to interact with the > > device. No /dev/ node is needed at all. > > > >> I've noticed that for example , for printer class there is a file > >> /sys/class/printer/lp0/dev that contains MAJOR:MINOR. > > > > Yes, because it needs a device node, the led class does not. > > > > Why do you want a /dev/ node? Are you going to be creating new ioctls > > for your device? That is really not recommended at all. > > I need a /dev node to manipulate my hex display device ( open , write , close). > > For example echo "A" > /dev/hexd will print out on display the letter A. The LED class should already have an interface for displaying information like this through sysfs. If it doesn't, then the LED class is probably not what you are looking for :) Then, again, go back to a misc device, which is what you are. good luck, greg k-h -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
