Is anyone taking care of upstreaming/maintaining dragonboard code/drivers?
As far as I saw during my u-boot activities It's a bit poor and I could do some work there while I'm fixing/updating u-boot.
yes there are ... there are many different pieces which are being worked on. the LT integration branch is where we merge on going upstream patches, so if you want to see what's happening with upstream, you can look at it:
this branch is rebased very frequently on mainline.
of course your help is more than welcome ...