On Fri, Mar 23, 2018 at 7:59 PM, ags <[email protected]> wrote: > That *seems* to have fixed it. Will need to run a test to be sure. It does > allow me to configure the audio pin as pruout, and I do see gpio entries and > the uio events in sysfs. > > I was wondering if it was the old U-Boot - I presume the old one doesn't > understand uboot overlays??
That is correct.. > > (was I correct to remove "cape_universal=enable" from the kernel command > line entry in uEnv.txt (or does it not matter once uboot overlays are > enabled?) it'll actually get ignored... > > The syntax of the directives I added to uEnv.txt look (to me) like they are > hard-coded into u-boot -- is that correct? That is, rather than generic > directives that look like: > > enable_uboot_overlay=<some overlay found in /lib/firmware> > enable_uboot_overlay=<some other overlay found in /lib/firmware> > disable_uboot_overlay=<yet another...> > > we now have: > > enable_uboot_overlays=1 # OK, that seems generic... tell > u-boot to handle overlays > > disable_uboot_overlay_audio=1 . # "audio" is hardcoded in the directive > itself onboard devices: https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Disable_on-board_devices (these change cape-universal)... > uboot_overlay_pru=/lib/firmware/AM335X-PRU-UIO-00A0.dtbo # u-boot > even knows about prus? pru is special: https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_PRU_Options > enable_uboot_cape_universal=1 > # ... and cape_universal? Correct, although i'm working on a project to have that auto-enabled.. Regards, -- Robert Nelson https://rcn-ee.com/ -- 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/CAOCHtYifiCAC2LRDYN7XSVQqkiD0ysiRvV26qgE_01MpqhYenQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
