How to enable BBB industrial P8_13 pin to mode7 to use as GPIO_23

Dear team,

How to enable BBB industrial P8_13 pin to mode7 to use as GPIO_23

Kindly help me to use the P8_12 to P8_19 pins to use mode7 means
P8_12–>GPIO1_12
P8_13–>GPIO0_23
P8_14–>GPIO0_26
P8_15–>GPIO1_15
P8_16–>GPIO1_14
P8_17–>GPIO0_27
P8_18–>GPIO2_1
P8_19–>GPIO0_22