On Thu, Sep 4, 2014 at 7:35 PM, Wang YanQing <udknight@xxxxxxxxx> wrote: > On Sun, Aug 31, 2014 at 11:24:56PM +0800, Wang YanQing wrote: >> PL2303 USB Serial devices may has GPIOs, this patch add >> basic PL2303 gpio support. >> >> Known issue: >> If gpios are in use(export to userspace through sysfs interface, etc), >> then call pl2303_release(unplug usb-serial convertor, modprobe -r, etc), >> will cause trouble, so we need to make sure there is no gpio user before >> call pl2303_release. >> >> Signed-off-by: Wang YanQing <udknight@xxxxxxxxx> >> --- >> Note: I sniffed office HXD gpio test program to get >> gpios control protocol with PL2303 RA, so I only >> test it with PL2303 RA and HXA, I don't have HXD, >> but because it is *office* HXD gpio test program, >> so if it doesn't work with HXD, I will feel surprise. I can confirm your patch is working fine on the HXD: http://www.zoobab.com/pl2303hxd-gpio I am still hunting for a simple C program to test the speed of the GPIOs and sysfs, if you have a good reference. Best, -- Benjamin Henrion <bhenrion at ffii.org> FFII Brussels - +32-484-566109 - +32-2-4148403 "In July 2005, after several failed attempts to legalise software patents in Europe, the patent establishment changed its strategy. Instead of explicitly seeking to sanction the patentability of software, they are now seeking to create a central European patent court, which would establish and enforce patentability rules in their favor, without any possibility of correction by competing courts or democratically elected legislators." -- 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
