How to modify the dts for a specific board - olimex a20 micro for example and rebuild the kernel?

For Developers
1

I am building an image for an a20-micro board from olimex. I want to make soem modifications in the dts for it, I would be disabling the HDMI and enabling a 4th uart port.

In general guidlines its said to edit teh dts file in target/linux/dts folder. but there isnt any for sunxi. There are some patches though

How can I edit teh dts file for olimex-a20-micro ?

Secondly is it OK if search and find in teh build directory the file sun7i-a20-olinuxino-micro.dts in all its locations and edit it. Then run the make command?

Will it build the new image with the modifications?

2

Your device's DTS is in the upstream linux kernel source. You have to treat it like a kernel patch, using quilt.

Usually, you can also edit the DTS in the build directory and re-run make, but your changes will be lost when the build system thinks it needs to clean the kernel build directory.

1 Like