how can i add rfkill recipe?

On Tue, Dec 19, 2017 at 4:23 PM, Sherif Omran <sherifomran2000@gmail.com>
wrote:

> i used core-image-minimal for a raspberry pi 0w. But i get rfkill can not
> open control device. when i give rfkill , i get the syntanx output, this
> means it exists.
> the wifi driver is installed.
>
> What is the rfkill device? is it /dev/rfkill ?
>
>