On Wed, 2011-11-16 at 18:00 +0530, Praveen kumar wrote: > Hi All, > I have a I2C chip driver,and there are two identical chips on > two different i2c bus. > I have registered the driver and initialized it and created two > nodes /dev/chip_0 and /dev/chip_1 > > If I open the node from user how will I make driver identify which > device to access .ie in the ioctl. So in your ioctl call you want to get the device structure right? If yes then have a look at scull/main.c file in scull folder at below location. git://github.com/martinezjavier/ldd3.git Basically you need to set private_data of filp at open time with device information and get the private_data from filp in ioctl. If you don't understand then just have a look at the file I mentioned. > > Am I clear ??? > > Praveen > > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
