linux/linux-5.4.31/Documentation/devicetree/bindings/input/regulator-haptic.txt

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* Regulator Haptic Device Tree Bindings
Required Properties:
- compatible : Should be "regulator-haptic"
- haptic-supply : Power supply to the haptic motor.
[*] refer Documentation/devicetree/bindings/regulator/regulator.txt
- max-microvolt : The maximum voltage value supplied to the haptic motor.
[The unit of the voltage is a micro]
- min-microvolt : The minimum voltage value supplied to the haptic motor.
[The unit of the voltage is a micro]
Example:
haptics {
compatible = "regulator-haptic";
haptic-supply = <&motor_regulator>;
max-microvolt = <2700000>;
min-microvolt = <1100000>;
};