Since the fix and merge of #621 happened so fast, I was able to test it today. Sadly, it does not work. This time the results are different - no error happens, but console output just plain stops after some diagnostic messages from the driver.

This is the last of what I see:

[    1.198118] 5a060000.serial: ttyLP0 at MMIO 0x5a060010 (irq = 74, base_baud = 5000000) is a FSL_LPUART
[    1.208224] 5a070000.serial: ttyLP1 at MMIO 0x5a070010 (irq = 75, base_baud = 5000000) is a FSL_LPUART

I have no clue as to why this happens. What fixes this for me is moving uart_add_one_port() before lpuart_global_reset(). So, where before #621 there were two calls to add_one_port(), and the patch removed the first one while reordering cleanup, what works for me is removing the second call and leaving cleanup as-is.

If necessary, I can create a PR later tonight.

cc @otavio @MrCry0