Unfortunately, that's the command that gives me the error message. Someone else has control of those gpio's and I can unexport them, even as root.
--Mark On Wednesday, November 29, 2017 at 9:34:35 AM UTC-5, William Hermans wrote: > > > > On Wed, Nov 29, 2017 at 7:27 AM, Mark A. Yoder <[email protected] > <javascript:>> wrote: > >> That fixed it. Thanks... >> >> Now I see all sorts of gpios are already exported. >> export gpio114 gpio13 gpio22 gpio30 gpio46 gpio50 gpio66 >> gpiochip0 >> gpio110 gpio115 gpio14 gpio23 gpio31 gpio47 gpio51 gpio67 >> gpiochip32 >> gpio111 gpio116 gpio15 gpio26 gpio4 gpio48 gpio60 gpio68 >> gpiochip64 >> gpio112 gpio117 gpio2 gpio27 gpio44 gpio49 gpio61 gpio69 >> gpiochip96 >> gpio113 gpio12 gpio20 gpio3 gpio45 gpio5 gpio65 gpio7 unexport >> >> I want to unexport a couple (14, 113 and 115) so the *fbtft_device* >> kernel driver and access them. But I get and error >> echo: write error: Invalid argument >> >> How do I unexport them? >> >>> >>> > as root: > > echo xxx > /sys/class/gpio/unexport > > Where xxx == the gpioxxx value you wish to reclaim. > > So in the example case of gpio112 . . . > > echo 112 > /sys/class/gpio/unexport > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/69f3feab-e287-4652-bdbc-549353b12d17%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
