On Tue, May 23, 2006 at 05:14:03PM +0100, Craig Shelley wrote: > Hi, > > I have had a few requests to add support for the CP2103 usb serial > converter chip to the CP2101 driver. (I suspect this will end up getting > renamed to CP210x some time in the future) > > This chip has 4 general purpose input/output pins which can be used to > control additional features of the target product. I suspect it will be > relatively straight forward to implement the support for these GPIO pins > in the existing driver. > > My question is, what API should the userland programs use to access this > extra functionality of the device?
sysfs files? Take a look at drivers/usb/misc/phidgetkit.c for a driver that has some different sensors on it that exports them through sysfs. I also think that the ftdi_sio usb-serial driver has some additional functionality like this, but am not sure what they are doing to export that to userspace. Take a look at driver too. thanks, greg k-h ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
