# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/hwmon/generic-pwm-tachometer.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Generic PWM based tachometer HW monitor driver

maintainers:
  - Laxman Dewangan <ldewangan@nvidia.com>

description: |
  Generic PWM based tachometer driver which captures the PWM signal and reports
  the speed of the device which generates the PWM signal. This helps in monitor
  the speed of fan.

properties:
  compatible:
    enum:
      - generic-pwm-tachometer

  pwms:
    maxItems: 1
    description: |
      This property contains the phandle of the PWM controller which capture the
      PWM signal.

required:
  - compatible
  - pwms

additionalProperties: false

examples:
  - |
    tegra_tachometer: tachometer@39c0000 {
       reg = <0x39c0000 0x0>;
       #pwm-cells = <2>;
       /* Other properties of tachometer */
    };

    generic_pwm_tachometer {
       compatible = "generic-pwm-tachometer";
       pwms = <&tegra_tachometer 0 1000000>;
    };
...