I'm going to answer (mostly) my own question here for posterity. At appears my process was mostly right, but I failed to update the reference to AM335X-PRU-RPROC-4-14-TI-00A0 in uEnv.txt, and that apparently does some weird things.
Executing /lib/systemd/systemd-modules-load shows that the module pruss_intc is not found, so I need to investigate why this is since I selected all the pru options in the kernel config. Perhaps, this module has changed names or combined with another? -- 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/665a0d5c-988c-4ec3-a621-9d3ec6fd9bf6%40googlegroups.com.
