[beagleboard] Configure all of the serial port as TTYO0

Hello, When i connect the RX and TX pins of serial debugger and launch minicom with TTYO0, the character sent is received. It's a normal situation, but if i connect all other RX and TX pins of serial ports (P9_26-P9_24, P9_22-P9_21, P9_11-P9_13, P8_38-P8_37) and launch minicom with TTYS0, TTY

[beagleboard] Configure all of the serial port as TTYO0

Hello, When i connect the RX and TX pins of serial debugger and launch minicom with TTYO0, the character sent is received. It's a normal situation, but if i connect all other serial ports (P9_26-P9_24, P9_22-P9_21, P9_11-P9_13, P8_38-P8_37) and launch minicom with TTYS0, TTYS1, TTYS2 or TTYS3,