Reported by Nikolaus Schaller, Apr 18, 2016

the Palmas chip (twl6037) has many settings (especially gpio modes 
and pull-ups) which are initialized from OTP where we have no 
documentation how the exact variant we use is defined.
Therefore someone should write a tool (kernel driver? U-boot?) to 
read out all registers and check the settings with the data sheet.
As a result we may have to write additional initialization to the 
Palmas.