dt-bindings: pwm: Convert imx tpm pwm to json-schema

Freescale i.MX TPM PWM controller

Required properties:

- compatible : Should be "fsl,imx7ulp-pwm".

- reg: Physical base address and length of the controller's registers.

- #pwm-cells: Should be 3. See pwm.yaml in this directory for a description of the cells format.

- clocks : The clock provided by the SoC to drive the PWM.

- interrupts: The interrupt for the PWM controller.

Note: The TPM counter and period counter are shared between multiple channels, so all channels

should use same period setting.

Example:

tpm4: pwm@40250000 {

	compatible = "fsl,imx7ulp-pwm";

	reg = <0x40250000 0x1000>;

	assigned-clocks = <&pcc2 IMX7ULP_CLK_LPTPM4>;

	assigned-clock-parents = <&scg1 IMX7ULP_CLK_SOSC_BUS_CLK>;

	clocks = <&pcc2 IMX7ULP_CLK_LPTPM4>;

	#pwm-cells = <3>;

};

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/pwm/imx-tpm-pwm.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Freescale i.MX TPM PWM controller

maintainers:

  - Anson Huang <anson.huang@nxp.com>

description: |

  The TPM counter and period counter are shared between multiple

  channels, so all channels should use same period setting.

properties:

  "#pwm-cells":

    const: 3

  compatible:

    enum:

      - fsl,imx7ulp-pwm

  reg:

    maxItems: 1

  assigned-clocks:

    maxItems: 1

  assigned-clock-parents:

    maxItems: 1

  clocks:

    maxItems: 1

required:

  - "#pwm-cells"

  - compatible

  - reg

  - clocks

additionalProperties: false

examples:

  - |

    #include <dt-bindings/clock/imx7ulp-clock.h>

    pwm@40250000 {

        compatible = "fsl,imx7ulp-pwm";

        reg = <0x40250000 0x1000>;

        assigned-clocks = <&pcc2 IMX7ULP_CLK_LPTPM4>;

        assigned-clock-parents = <&scg1 IMX7ULP_CLK_SOSC_BUS_CLK>;

        clocks = <&pcc2 IMX7ULP_CLK_LPTPM4>;

        #pwm-cells = <3>;

    };