I have been read the official document： http://www.genode.org/documentation/developer-resources/porting

I know the basic steps to port driver to genode. but i have some question：how can i write a port file？i don’t  know  what thing should write in a port file？

only include License ,version,downloads, URL,SHA,DIR.patches，patch_ot.  is’t ok?

what the relationship  between port file and hash file?