1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/input/pwm-vibrator.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: PWM vibrator 8 9maintainers: 10 - Sebastian Reichel <sre@kernel.org> 11 12description: > 13 Registers a PWM device as vibrator. It is expected, that the vibrator's 14 strength increases based on the duty cycle of the enable PWM channel 15 (100% duty cycle meaning strongest vibration, 0% meaning no vibration). 16 17 The binding supports an optional direction PWM channel, that can be 18 driven at fixed duty cycle. If available this is can be used to increase 19 the vibration effect of some devices. 20 21properties: 22 compatible: 23 const: pwm-vibrator 24 25 pwm-names: 26 items: 27 - const: enable 28 - const: direction 29 minItems: 1 30 31 pwms: 32 minItems: 1 33 maxItems: 2 34 35 enable-gpios: true 36 37 vcc-supply: true 38 39 direction-duty-cycle-ns: 40 description: > 41 Duty cycle of the direction PWM channel in nanoseconds, 42 defaults to 50% of the channel's period. 43 44required: 45 - compatible 46 - pwm-names 47 - pwms 48 49additionalProperties: false 50 51examples: 52 - | 53 vibrator { 54 compatible = "pwm-vibrator"; 55 pwms = <&pwm9 0 1000000000 0>, 56 <&pwm8 0 1000000000 0>; 57 pwm-names = "enable", "direction"; 58 direction-duty-cycle-ns = <1000000000>; 59 }; 60