root@raspberrypi:/home/pi/device-driver# insmod ssegled.ko Error: could not insert module ssegled.ko: Device or resource busy root@raspberrypi:/home/pi/device-driver# dmesg | tail [ 162.673488] ssegled loading... [ 162.673520] request_mem_region failed. [ 162.678749] Can not use GPIO registers. [ 171.441217] ssegled loading... [ 171.441248] request_mem_region failed. [ 171.446395] Can not use GPIO registers.
