* Qualcomm MSM UART

Required properties:
- compatible :
	- "qcom,msm-uart", and one of "qcom,msm-hsuart" or
	  "qcom,msm-lsuart".
- reg : offset and length of the register set for the device
	for the hsuart operating in compatible mode, there should be a
	second pair describing the gsbi registers.
- interrupts : should contain the uart interrupt.

Optional properties:
- pinctrl-names, pinctrl:
	- the pincontrol settings to configure muxing so all UART pins are
	  exposed to the outside; the names "default" and "avm,tx-only" are
	  supported, with the driver supporting to switch between them at
	  runtime if tx only usage is requested by userspace

There are two different UART blocks used in MSM devices,
"qcom,msm-hsuart" and "qcom,msm-lsuart".  The msm-serial driver is
able to handle both of these, and matches against the "qcom,msm-uart"
as the compatibility.

The registers for the "qcom,msm-hsuart" device need to specify both
register blocks, even for the common driver.

Example:

	uart@19c400000 {
		compatible = "qcom,msm-hsuart", "qcom,msm-uart";
		reg = <0x19c40000 0x1000>,
		      <0x19c00000 0x1000>;
		interrupts = <195>;
	};

* Qualcomm MSM HSUART

Required properties:
- compatible : one of:
	- "qcom,msm-lsuart-v14"
- reg : offset and length of the register set for the device.
- interrupts : should contain the uart interrupt.

Optional properties:
- qcom,config-gpio : Set this value if UART GPIOs need to be configured by driver.
set 4 if 4-wire UART used (for Tx, Rx, CTS, RFR GPIOs).
Set 1 if 2-wire UART used (for Tx, Rx GPIOs).
- qcom,<gpio-name>-gpio : handle to the GPIO node, see "gpios property" in
Documentation/devicetree/bindings/gpio/gpio.txt.
"gpio-name" can be "tx", "rx", "cts" and "rfr" based on number of UART GPIOs
need to configured.
qcom,use-pm : If present, this property will cause the device to prevent system
suspend as long as the port remains open.
- Refer to "Documentation/devicetree/bindings/arm/msm/msm_bus.txt" for below properties:
    - qcom,msm_bus,name
    - qcom,msm_bus,num_cases
    - qcom,msm_bus,active_only
    - qcom,msm_bus,num_paths
    - qcom,msm_bus,vectors

Aliases:
An alias may optionally be used to bind the serial device to a tty device
(ttyHSLx) with a given line number. Aliases are of the form serial<n> where <n>
is an integer representing the line number to use. On systems with multiple
serial devices present it is recommended that an alias be defined for each such
device.

Example:
	aliases {
		serial0 = &uart0;       // This device will be called ttyHSL0
	};

	uart0: serial@19c400000 {
		compatible = "qcom,msm-lsuart-v14"
		reg = <0x19c40000 0x1000">;
		interrupts = <195>;

		qcom,config-gpio = <4>;
		qcom,tx-gpio = <&msmgpio 41 0x00>;
		qcom,rx-gpio = <&msmgpio 42 0x00>;
		qcom,cts-gpio = <&msmgpio 43 0x00>;
		qcom,rfr-gpio = <&msmgpio 44 0x00>;
		qcom,use-pm;

		qcom,msm-bus,name = "serial_uart0";
		qcom,msm-bus,num-cases = <2>;
		qcom,msm-bus,num-paths = <1>;
		qcom,msm-bus,vectors-KBps =
				<84 512 0 0>,
				<84 512 500 800>;
	};