QSerialPortInfo: returns the empty list of ports on the ARM9 platform from Atmel.

This platform contains real serial ports: ttyS[0-2] but availablePorts() returns empty list.

QtSerialPort is compiled with libudev support.

The utility udevadm (through remote ssh session), e.g. for /dev/ttyS1 returns:

$udevadm info -a --name=/dev/ttyS1

looking at device '/devices/platform/atmel_usart.1/tty/ttyS1':
KERNEL=="ttyS1"
SUBSYSTEM=="tty"
DRIVER==""

looking at parent device '/devices/platform/atmel_usart.1':
KERNELS=="atmel_usart.1"
SUBSYSTEMS=="platform"
DRIVERS=="atmel_usart"

looking at parent device '/devices/platform':
KERNELS=="platform"
SUBSYSTEMS==""
DRIVERS==""

Problem that the current implementation of a enumerator from QSerialPortInfo ignores all "tty" devices from the "platform" subsystem.

After commenting of a line "canAppendToList = false;" from the file "qserialportinfo_unix.cpp":

...
                        } else if (subsys == QLatin1String("platform")) { // Platform 'pseudo' bus for legacy device.
                            // Skip this devices because this type of subsystem does
                            // not include a real physical serial device.
                            //canAppendToList = false;
                        }
...

the problem was resolved.