ocp:P8_12_pinmux was not found

This is issue was reported on the Adafruit forums: Re: RE: Running Some Software and Making My BBB Go/Seth

This error occurred:

ocp:P8_12_pinmux was not found under /sys/devices/platform/ocp

I’ve been able to reproduce this error with the test code in the bonescript README:

root@beaglebone:~# cat bonescript-test.js 
var b = require('bonescript');

b.pinMode('P8_12', b.INPUT);
b.pinMode('P8_13', b.OUTPUT);

setInterval(copyInputToOutput, 100);

function copyInputToOutput() {
    b.digitalRead('P8_12', writeToOutput);
    function writeToOutput(x) {
        b.digitalWrite('P8_13', x.value);
    }
}

Error:

root@beaglebone:~# node ./bonescript-test.js 

/root/node_modules/bonescript/src/hw_mainline.js:84
    if(!pinmux) { throw p + " was not found under " + my.is_ocp(); }
                                                    ^
ocp:P8_12_pinmux was not found under /sys/devices/platform/ocp

My BeagleBone is running:

root@beaglebone:~# uname -a
Linux beaglebone 4.4.21-bone13 #1 Fri Sep 16 07:34:28 UTC 2016 armv7l GNU/Linux
root@beaglebone:~# cat /etc/debian_version 
8.6
root@beaglebone:~# cat /etc/dogtag 
BeagleBoard.org Debian Image 2016-08-14
root@beaglebone:~# node --version
v0.12.16
root@beaglebone:~# node -pe "require('bonescript').getPlatform().bonescript"
0.5.0

root@beaglebone:~# cat /sys/devices/platform/bone_capemgr/slots
 0: PF----  -1 
 1: PF----  -1 
 2: PF----  -1 
 3: PF----  -1 
 4: P-O-L-   0 Override Board Name,00A0,Override Manuf,BB-SPIDEV1
 5: P-O-L-   1 Override Board Name,00A0,Override Manuf,am33xx_pwm

root@beaglebone:~# cat /boot/uEnv.txt  |grep -v ^# |grep -v '^$'
uname_r=4.4.21-bone13
cmdline=coherent_pool=1M quiet fbcon=map:10
cape_enable=bone_capemgr.enable_partno=BB-SPIDEV1

[e29qwg]

I also faced this issue. For a little workaround, you need to manually load device tree overlay by using following command on BeagleBone’s shell.

config-pin overlay cape-universal

Since I’m using BB Green Wireless, my workaround is as followed.

config-pin overlay univ-bbgw

Hope this help

[jadonk]

Guessing that this pin doesn’t have a pinmux helper loaded. I’ll try to check tomorrow, if not then, later next week.