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Linux/AM3352: Changing I2C interface to PMIC

Avinash Neethi1
Expert 2125 points

Part Number: AM3352

Tool/software: Linux

Hi All,

          We made a customised board with AM3352 processor and Atmeg Micro controller. PMIC TPS65217D is connected to both the Micro controller as well as microprocessor through I2C1 . we have made the customisation in U-Boot and Linux for our board. 

           In U-Boot , PMIC is accessed through I2C0. we need to change the sequence, so that PMIC can also is accessed through I2C1. 

           we observed in Beagle bone black by default DCDC2 voltage on power-on sequence is 1.1 V and while booting linux, voltage level changes to 1.325 V. But in Beagle bone black PMIC is connected to I2C0, In our customised board PMIC is connected to I2C1. 

  U-Boot - Version 2017.01

  Linux - Version 4.4.41

Questions:


1. What changes has to be done in U-Boot so that we can able to access the PMIC through I2C1 from AM3352.

 

Regards,

Avinash N