xref: /openbmc/linux/Documentation/devicetree/bindings/pwm/snps,dw-apb-timers-pwm2.yaml (revision 47aab533)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright (C) 2022 SiFive, Inc.
%YAML 1.2
---
$id: http://devicetree.org/schemas/pwm/snps,dw-apb-timers-pwm2.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Synopsys DW-APB timers PWM controller

maintainers:
  - Ben Dooks <ben.dooks@sifive.com>

description:
  This describes the DesignWare APB timers module when used in the PWM
  mode. The IP core can be generated with various options which can
  control the functionality, the number of PWMs available and other
  internal controls the designer requires.

  The IP block has a version register so this can be used for detection
  instead of having to encode the IP version number in the device tree
  compatible.

allOf:
  - $ref: pwm.yaml#

properties:
  compatible:
    const: snps,dw-apb-timers-pwm2

  reg:
    maxItems: 1

  "#pwm-cells":
    const: 3

  clocks:
    items:
      - description: Interface bus clock
      - description: PWM reference clock

  clock-names:
    items:
      - const: bus
      - const: timer

  snps,pwm-number:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: The number of PWM channels configured for this instance
    enum: [1, 2, 3, 4, 5, 6, 7, 8]

required:
  - compatible
  - reg
  - "#pwm-cells"
  - clocks
  - clock-names

additionalProperties: false

examples:
  - |
    pwm: pwm@180000 {
      compatible = "snps,dw-apb-timers-pwm2";
      reg = <0x180000 0x200>;
      #pwm-cells = <3>;
      clocks = <&bus>, <&timer>;
      clock-names = "bus", "timer";
    };