P9_15 ADC_CS_PIN is not claimed

[giuliomoro]

So that on some revisions of the BBB it is by default set to the wrong pinmux.

See, e.g.: here

As a hotfix, try this device-tree overlay, generated with bonescript :
P9_15.zip

Follow these instructions to test the hotfix:

• unzip the archive
• copy the dtbo file to the board: scp bspm_P9_15_27-00A0.dtbo root@192.168.7.2:/lib/firmware
• on the beaglebone run echo bspm_P9_15_27 > /sys/devices/bone_capemgr.?/slots to load the overlay
• make sure the above does not cause errors, also run dmesg to make sure no error was generated
• if the above fixes it, then add the following lines after line 14 of /etc/init.d/bela so that the fix is loaded at startup

echo "Adding P9_15_27 Cape Overlay..."
echo bspm_P9_15_27 > /sys/devices/bone_capemgr.9/slots
echo 48 > /sys/class/gpio/export

EDIT: replaced bone_capemgr.? with bone_capemgr.9 because the script is executed by sh which does not expand the ?

[giuliomoro]

Confirmed