Re: How many ways are there to access a usb device?
Greg KH <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Mon, Apr 23, 2007 at 09:34:38PM +0530, Ashok Kumar wrote: > Hi, > > for this conversation i am taking a simple usb device( surely this is > not a block device, a kind of char device) > > step 1 > --------- > i can create a kernel module with specifically allocated major and > minor number. so through device file i can access the device driver. > This is surely a char device driver. > > step 2 > ---------- > i can create a kernel module without specifically allocated major and > minor number. > But i will create only attribute files in /sys. so that i can access the device. > still, is it a char device driver.? No, /sys does not have a char device interface. There is also the way to access the device though usbfs in /proc/bus/usb or /dev/bus/usb, depending on how your distro sets it up. thanks, greg k-h ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel