Rtl8814au (edimax ac1750 wireless usb adapter) in OpenWrt

i want to install edimax 1750 wireless usb dongle which contains rtl8814au chipset.
i alraedy have the openwrt build system and tried to compile this driver under /package/kernel/rtl8814au but the copile was not sucessfull and i am messed up with lot f readings like differents source code for rtl8814au,patches,Makefiles .can anybody help me in installing this sdevice driver in my openwrt running in raspberry pi

There's some good information (though not necessarily pre-packaged drivers) at