Welcome to the Armadeus development environment.
armadeus login: root
# modprobe irq_ocore
# modprobe 8250
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
# modprobe board_irq_mng.ko
# modprobe 16750_ocore.ko
serial8250.0: ttyS0 at MMIO 0xb8000040 (irq = 321) is a TI16750
serial8250.1: ttyS0 at MMIO 0xb8000040 (irq = 321) is a TI16750
# modprobe wm831x-gpio
# echo 245 > /sys/class/gpio/export
# echo out > /sys/class/gpio/gpio245/direction
# echo 1 > /sys/class/gpio/gpio245/value
# ls /dev/ttyS0
/dev/ttyS0
# export GSM_PORT=/dev/ttyS0
# stty -F $GSM_PORT raw -echo -echoe -echok 115200
stty: /dev/ttyS0: Input/output error
# stty -F $GSM_PORT raw -echo -echoe -echok 115200
stty: /dev/ttyS0: Input/output error
# ls /dev/ttyS0
/dev/ttyS0
# lsmod
Module                  Size  Used by    Not tainted
wm831x_gpio             2573  1
16750_ocore             1218  0
8250                   19642  0
pod_gpio                3050  0
pod_gpio_platform        787  0
irq_ocore               2285  0
board_irq_mng            736  0
#