For now is very simple, In future I'm planning to add some other features.
CIB Notation looks like:
primitive BTIER_TIER1 ocf:brick:btier \
params tier_devices="/dev/sda:/dev/sdb" \
op monitor interval="10s"
I would say thanks to Mark for giving us such a piece of software.
I'm using it in production (with LVM over tiered device) and it works fine.
Download it from my Dropbox and place in /usr/lib/ocf/resource.d/brick (or whatever) directory.