raspberry_pi2_disable_usb.txt

Raspberry disable usb:
echo "0" | sudo tee /sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1:1.0/1-1-port2

sudo sh -c "echo 0 > /sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1:1.0/1-1-port2"

Final ok (porta 2 com defeito): 

echo "0" | sudo tee /sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1:1.0/1-1-port2/power/pm_qos_no_power_off