how to enable uart4(ttymxc3) / uart5(ttymxc4) using Zeus in Yocto

[cw_lee]

I am trying to use the zeus kernel (v5.4.3) in Yocto,

but uart4 / uart5 are not enabled. In rocko (kernel version:4.9.11) it worked like the link below.

Link: https://variwiki.com/index.php?title=DART-6UL_UART

SOM's expansion board was self-manufactured and produced, and rocko works well without any problems, but I want to upgrade to zeus.

I tried in the same way that uart4 / uart5 was enabled with rocko.

(however, only the modified file is different because the kernel's device tree file name has changed)

Who could possibly advise?

See the post below for how I did when rocko and zeus. (I moved the same contents in below post to the device tree)

Link: https://community.nxp.com/t5/i-MX-Processors/how-to-enable-UART4-and-UART5/td-p/957363

[Rita_Wang]

If you are using the i.mx6ul platform, you can refer to this method https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/How-To-use-UART7-8-on-i-MX6UL/ta-p/10995....