root@beaglebone:/sys/devices/platform# echo BB-UART1 >/sys/devices/platform/bone_capemgr/slots
root@beaglebone:/sys/devices/platform# echo BB-BONE-AUDI >/sys/devices/platform/bone_capemgr/slots
-bash: echo: write error: No such file or directory
root@beaglebone:/sys/devices/platform# echo BB-BONE-AUDI-02 >/sys/devices/platform/bone_capemgr/slots
-bash: echo: write error: Invalid argument
root@beaglebone:/sys/devices/platform# cat /sys/devices/platform/bone_capemgr/slots
0: PF---- -1
1: PF---- -1
2: PF---- -1
3: PF---- -1
14: P-O-L- 0 Override Board Name,00A0,Override Manuf,BB-UART1
root@beaglebone:/sys/devices/platform# uname -a
Linux beaglebone 4.4.54-ti-r93 #1 SMP Fri Mar 17 13:08:22 UTC 2017 armv7l GNU/Linux