I am unable to get a terminal on the serial port (pins 6-10). Following the solution in , I activated the /dev/tty2 overlay:
Retrieving file: /hw_intfc.conf reading /hw_intfc.conf 1152 bytes read in 2 ms (562.5 KiB/s) dtoverlay number: 0, name:/overlays/console-on-ttyS2.dtbo
Using anything but /dev/ttyS2 in the kernel command line results in output stopping after “Starting kernel …”, so I assume that ttyS2 is the right value, even if the kernel log shows only ttyS0.
# dmesg | grep tty [ 0.000000] Kernel command line: console=ttyS2,1500000n8 quiet [ 0.326184] Registered FIQ tty driver [ 0.350383] console [ttyFIQ0] enabled [ 0.350577] Registered fiq debugger ttyFIQ0 [ 3.459996] ff180000.serial: ttyS0 at MMIO 0xff180000 (irq = 35, base_baud = 1500000) is a 16550A
Finally, /etc/inittab contains a line for a terminal on /dev/ttyS2, but a console is never opened.
I am running out of ideas, so would be grateful for pointers in the right direction.
Some background information: I managed to integrate the Radxa kernel, u-boot and arm firmware into a Buildroot project. The root file system is not derived from Debian, but Buildroot generated. Init system is handled by BusyBox.