hello
to activate the uart, I change the /boot/config.txt
1. last line => overlay=console-uart0-overlay
2. intf:uart0=off => intf-uart0=on
is that all? but, I can't connect the uart0.
Is there anything else I need to configure?
$ dmesg | grep tty
[ 0.000000] Kernel command line: storagemedia=emmc androidboot.storagemedia=emmc androidboot.mode=normal androidboot.slot_suffix= androidboot.serialno=987cee5e97234e00 root=/dev/mmcblk1p9 rw rootwait earlycon=uart8250,mmio32,0xff1a0000 swiotlb=1 console=ttyFIQ0 rootfstype=ext4 coherent_pool=1m
[ 0.560088] Registered FIQ tty driver
[ 1.910761] ff180000.serial: ttyS0 at MMIO 0xff180000 (irq = 37, base_baud = 1500000) is a 16550A
[ 2949.553543] ttyS0 - failed to request DMA, use interrupt mode
