#!/bin/sh

if [ $# -ne 3 ]; then
	echo Please input as follow:
	echo "  $0 PhyAddress PinId Value"
	exit 100
fi

GPIO_OUTPUT=`devmem $1 32`
MASK=$((0x1 << $2))

if [ $3 == 1 ]; then
	VAL=$(($GPIO_OUTPUT | $MASK))
else
	VAL=$(($GPIO_OUTPUT & ~($MASK)))
fi

devmem $1 32 $VAL