I think the patch is also wrong, since the information is already 
described in DT - just the other way around: The battery references 
the charger. This provides all required information to the kernel 
for a 1:1 link. 

-- Sebastian 

I added this so that cpcap_charger may become aware of the battery insertion state by querying the battery driver.
Would you thus recommend that instead of adding this phandle i should amend the series such that cpcap_charger walks the tree looking for a cpcap_battery compatible node and then determines if the charger phandle points to itself? Is there some recommended way performing this reverse search?