| * UART (Universal Asynchronous Receiver/Transmitter) |
| - "serial" if the port type is unknown. |
| - reg : offset and length of the register set for the device. |
| - interrupts : should contain uart interrupt. |
| - clock-frequency : the input clock frequency for the UART. |
| - current-speed : the current active speed of the UART. |
| - reg-offset : offset to apply to the mapbase from the start of the registers. |
| - reg-shift : quantity to shift the register offsets by. |
| - reg-io-width : the size (in bytes) of the IO accesses that should be |
| performed on the device. There are some systems that require 32-bit |
| accesses to the UART (e.g. TI davinci). |
| - used-by-rtas : set to indicate that the port is in use by the OpenFirmware |
| RTAS and should not be registered. |
| - no-loopback-test: set to indicate that the port does not implements loopback |
| reg = <0x80230000 0x100>; |
| clock-frequency = <3686400>; |
