HackXIt
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HackXIt reacted to martinayotte in RK3328 Kernel
Like many other boards, even if you have many /dev/ttyS*, it doesn't mean the actual UARTs are enabled in the DeviceTree.
You should probably look in the DTS (or decompile DTB into DTS) to figured out.
When a UART is detected at boot time, you will see it in "dmesg" which will show on which /dev/tttyS* it will be attached.
BTW, if not enabled, UARTs can also be enabled using overlays ...