root@beaglebone:~# cat $SLOTS
 0: PF----  -1
 1: PF----  -1
 2: PF----  -1
 3: PF----  -1

root@beaglebone:~# cat $PINS | grep 'pin 56\|pin 57\|pin 58'
pin 56 (44e108e0.0) 00000027 pinctrl-single
pin 57 (44e108e4.0) 00000027 pinctrl-single
pin 58 (44e108e8.0) 00000027 pinctrl-single

root@beaglebone:~# echo CB7S-LED-PRU1 > $SLOTS
root@beaglebone:~# cat $SLOTS
 0: PF----  -1
 1: PF----  -1
 2: PF----  -1
 3: PF----  -1
 7: P-O-L-   0 Override Board Name,00A0,Override Manuf,CB7S-LED-PRU1

root@beaglebone:~# journalctl -f
-- Logs begin at Wed 2016-05-11 15:23:19 UTC. --
May 11 16:03:26 beaglebone kernel: bone_capemgr bone_capemgr: part_number 'CB7S-LED-PRU1', version 'N/A'
May 11 16:03:26 beaglebone kernel: bone_capemgr bone_capemgr: slot #7: override
May 11 16:03:26 beaglebone kernel: bone_capemgr bone_capemgr: Using override eeprom data at slot 7
May 11 16:03:26 beaglebone kernel: bone_capemgr bone_capemgr: slot #7: 'Override Board Name,00A0,Override Manuf,CB7S-LED-PRU1'
May 11 16:03:26 beaglebone kernel: bone_capemgr bone_capemgr: slot #7: dtbo 'CB7S-LED-PRU1-00A0.dtbo' loaded; overlay id #0

root@beaglebone:~# cat $PINS | grep 'pin 56\|pin 57\|pin 58'
pin 56 (44e108e0.0) 00000027 pinctrl-single
pin 57 (44e108e4.0) 00000027 pinctrl-single
pin 58 (44e108e8.0) 00000027 pinctrl-single