On Tue, Mar 22, 2011 at 09:25:07PM -0700, Guenter Roeck wrote: > On Tue, Mar 22, 2011 at 11:45:24PM -0400, Greg KH wrote: > > On Tue, Mar 22, 2011 at 08:43:47PM -0700, Guenter Roeck wrote: > > > This patch adds support for the I2C interface of the Devantech USB-ISS > > > Multifunction adapter. > > > > > > Signed-off-by: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx> > > > --- > > > The driver has one problem: It competes with the cdc_acm driver for device > > > access. Copying the usb mailing list in the hope that someone can tell me > > > if there is a way to prevent this from happening. > > > > Why does it "compete"? > > Is it because this driver also exposes a cdc-acm class interface? Why > > I guess so. > > > is it doing that if it doesn't follow that spec? We do already support > > I don't know if it follows the cdc-acm specification or not, though I would > think it does since the cdc-acm driver recognizes it. I do see the > "This device cannot do calls on its own. It is not a modem." message. > > I suspect the device exposes the cdc-acm class interface because it is > a convenient means to make it show up as COM port in Windows. > But I am not associated with the manufacturer, so that is just a wild guess. > > If it does follow the cdc-acm specification, does that help me anything ? It should, you can talk to the device from userspace using that virtual serial port, right? Isn't that what you need to do here? Why try to create a new type of interface to the device from what it was supposed to be by the manufacturer? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
