Thanks Anish .. I got your point . I was using struct inode *inode = file->f_dentry->d_inode; min = iminor(inode);
to see which node has been opened, I wanted to make sure myself the correct/best way of getting this information. Praveen On Wed, Nov 16, 2011 at 8:02 PM, anish kumar <anish198519851...@gmail.com>wrote: > 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@kernelnewbies.org > > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > >
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