How can i do with mp157 extlinux.conf?

[SKim.1761]

I am trying stm32mp157f-dk2 for learning linux based on starter package

I just got succeed with load example 1 dtb and echo uart operating

Anyway so I got checked the extlinux.conf file can control which dtb would be called 

But I dont know what's happening let me show what i wonder

1. Why stm32mp157c-dk2-extlinux.conf is called?

2. Why load stm32mp157c-dk2.dtb? there's not FDT setting in default LABEL

I can do with just change conf file in 157c-dk2 for now

But i want to know how to select conf file

Thank you

[ienecode]

Hi, I have similar problem to understan extlinux.conf file.

I built and flash image to my STM32MP157f-dk2 board. The next I edited *.dts file by adding m_can1 , I am compiled *.dts file to *.dtb and copy to target board to /boot directory .... I Restart board and still I do not have CAN device....

I thinking that problem is related which *.dtb called..

@SKim.1761Do you tried change *.dts file adding any interface ?