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- * UART (Universal Asynchronous Receiver/Transmitter)
- Required properties:
- - compatible : one of:
- - "ns8250"
- - "ns16450"
- - "ns16550a"
- - "ns16550"
- - "ns16750"
- - "ns16850"
- - "nvidia,tegra250-uart"
- - "ibm,qpace-nwp-serial"
- - "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.
- Optional properties:
- - 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.
- - used-by-rtas : set to indicate that the port is in use by the OpenFirmware
- RTAS and should not be registered.
- Example:
- uart@80230000 {
- compatible = "ns8250";
- reg = <0x80230000 0x100>;
- clock-frequency = <3686400>;
- interrupts = <10>;
- reg-shift = <2>;
- };
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