Where are the addresses defined for device tree of Dragonboard 820c?

custom_board

#1

I am not familiar with device trees and I see in the device tree things like “serial@75b0000” and “reg = <0x75b0000 0x1000>;”, so where does the 75b0000 come from? Is it defined in a hardware document somewhere?
Thanks,
kimbo


#2

Register (reg) are typically defined with address,size pair, the value comes from the SoC specification which is not available (yet) for dragonboard 820c.


#3

You can find a few hardware docs here, see e.g. Schematics
https://developer.qualcomm.com/hardware/snapdragon-820e/tools

Some docs could be added to

But the Hardware Register Description is missing.


#4

Thank you for the response. I am also using a Inforce 6601 SOM which uses the snapdragon 820 : https://www.inforcecomputing.com/products/system-on-modules-som/qualcomm-snapdragon-820-inforce-6601-micro-som

I will look through their documentation for a SoC specification or ask Inforce for the information.