If all that you want different from the default configuration is ttyO4 working, then Winston's advice is good.
If there are other/additional changes, then you will need to make additional edits or changes to the ".dts" or ".dti" files. --- Graham == On Thu, Mar 12, 2015 at 12:21 PM, <[email protected]> wrote: > On Thursday, March 12, 2015 at 12:36:33 PM UTC-4, Enoch wrote: > >> Is there some /etc/init.d script or equivalent to manipulate the pin >> mux? >> If not, links to where to start dealing with the source would be >> appreciated. >> > > You need a DTB with the UARTs enabled. See: > > https://github.com/RobertCNelson/dtb-rebuilder/tree/3.14-ti > > In particular, for ttyO4 you'll want to look at: > > > https://github.com/RobertCNelson/dtb-rebuilder/blob/3.14-ti/src/arm/am335x-boneblack-ttyO4.dts > > The steps are: > > git clone https://github.com/RobertCNelson/dtb-rebuilder.git > cd dtb-rebuilder > git checkout 3.14-ti > make src/arm/am335x-boneblack-ttyO4.dtb > cp src/arm/am335x-boneblack-ttyO4.dtb /boot/dtbs/`uname -r`/ > > > Then you'll need to edit /boot/uEnv.txt and add: > > dtb=am335x-boneblack-ttyO4.dtb > > Then reboot; check dmesg to make sure that the pinmux-helper has properly > set up the pins for uart mode. > > -W > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/E0D26y1wypU/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- 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]. For more options, visit https://groups.google.com/d/optout.
