The chosen node --------------- The chosen node does not represent a real device, but serves as a place for passing data between firmware and the operating system, like boot arguments. Data in the chosen node does not represent the hardware. stdout-path property -------------------- Device trees may specify the device to be used for boot console output with a stdout-path property under /chosen, as described in ePAPR, e.g. / { chosen { stdout-path = "/serial@f00:115200"; }; serial@f00 { compatible = "vendor,some-uart"; reg = <0xf00 0x10>; }; }; If the character ":" is present in the value, this terminates the path. The meaning of any characters following the ":" is device-specific, and must be specified in the relevant binding documentation. For UART devices, the preferred binding is a string in the form: {{{}}} where baud - baud rate in decimal parity - 'n' (none), 'o', (odd) or 'e' (even) bits - number of data bits flow - 'r' (rts) For example: 115200n8r Implementation note: Linux will look for the property "linux,stdout-path" or on PowerPC "stdout" if "stdout-path" is not found. However, the "linux,stdout-path" and "stdout" properties are deprecated. New platforms should only use the "stdout-path" property.