Qualcomm Technologies, Inc. Vibrator-LDO

QPNP (Qualcomm Technologies, Inc. Plug N Play) Vibrator-LDO is a peripheral
on some QTI PMICs. It can be interfaced with the host processor via SPMI.

Vibrator-LDO peripheral supports Eccentric Rotation Mass (ERM) vibrator.

Properties:

- compatible
	Usage:      required
	Value type: <string>
	Definition: "qcom,qpnp-vibrator-ldo".

- reg
	Usage:      required
	Value type: <u32>
	Definition: Base address of vibrator-ldo peripheral.

- qcom,vib-ldo-volt-uv
	Usage:      required
	Value type: <u32>
	Definition: The optimal voltage requirement of the vibrator motor for
		    a normal vibration. Value is specified in microvolts.

- qcom,disable-overdrive
	Usage:      optional
	Value type: <empty>
	Definition: Do not apply overdrive voltage.

- qcom,vib-overdrive-volt-uv
	Usage:      optional and not required if qcom,disable-overdrive present
	Value type: <u32>
	Definition: The voltage in microvolts used as overdrive factor for
		    improving motor reactivity at the start of vibration.
		    If this property not specified, a default value of
		    2 times the value specified in qcom,vib-ldo-volt-uv
		    property is used.

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Example
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pmi632_vib: qcom,vibrator@5700 {
	compatible = "qcom,qpnp-vibrator-ldo";
	reg = <0x5700 0x100>;
	qcom,vib-ldo-volt-uv = <1504000>;
	qcom,disable-overdrive;
	qcom,vib-overdrive-volt-uv = <3544000>;
};