dt-bindings: arm: atmel,at91sam9260-pit: convert to DT schema

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/arm/atmel,at91sam9260-pit.yaml#

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

title: Atmel AT91SAM9260 Periodic Interval Timer (PIT)

maintainers:

  - Nicolas Ferre <nicolas.ferre@microchip.com>

  - Claudiu Beznea <claudiu.beznea@tuxon.dev>

description:

  The Periodic Interval Timer (PIT) is part of the System Controller of

  various Microchip 32-bit ARM-based SoCs (formerly Atmel AT91 series).

  It is a simple down-counter timer used mainly as the kernel tick source.

  The PIT is clocked from the slow clock and shares a single IRQ line with

  other System Controller peripherals.

properties:

  compatible:

    const: atmel,at91sam9260-pit

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks:

    maxItems: 1

required:

  - compatible

  - reg

  - interrupts

unevaluatedProperties: false

examples:

  - |

    #include <dt-bindings/interrupt-controller/irq.h>

    timer@fffffd30 {

        compatible = "atmel,at91sam9260-pit";

        reg = <0xfffffd30 0x10>;

        interrupts = <1 IRQ_TYPE_LEVEL_HIGH>;

        clocks = <&clk32k>;

    };

...

Atmel system registers

PIT Timer required properties:

- compatible: Should be "atmel,at91sam9260-pit"

- reg: Should contain registers location and length

- interrupts: Should contain interrupt for the PIT which is the IRQ line

  shared across all System Controller members.

PIT64B Timer required properties:

- compatible: Should be "microchip,sam9x60-pit64b" or

			"microchip,sam9x7-pit64b", "microchip,sam9x60-pit64b"