Does anyone know what the remoteproc error codes are?

pru_rproc doesn't start the pru's at boot time, I assume this is the new 
behaviour in 4.14 with the uBoot overlays. I've updated initramfs since 
symlinking my binary to /lib/firmware/am335x-pru1-fw, that hasn't helped. 
I've done an rmmod/modprobe cycle, that hasn't helped either.

However, I would have expected it to start when I:

debian@beaglebone:/lib/firmware$ sudo echo 'start' > 
/sys/class/remoteproc/remoteproc2/state
-bash: /sys/class/remoteproc/remoteproc2/state: Permission denied

Looking at dmesg, I see:

[22251.654264] remoteproc remoteproc2: powering up 4a338000.pru
[22251.654353] remoteproc remoteproc2: Direct firmware load for 
am335x-pru1-fw failed with error -2
[22251.654371] remoteproc remoteproc2: request_firmware failed: -2
[22251.665903] remoteproc remoteproc2: Boot failed: -2

The .out file is built with Ti v2.1.5 compiler under CCS - do I need to 
update my pru-software-support-package?

It would be handy if I could figure out what the -2 error code was.




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