dt-bindings: watchdog: Add support for TI K3 RTI watchdog

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/watchdog/ti,rti-wdt.yaml#

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

title: Texas Instruments K3 SoC Watchdog Timer

maintainers:

  - Tero Kristo <t-kristo@ti.com>

description:

  The TI K3 SoC watchdog timer is implemented via the RTI (Real Time

  Interrupt) IP module. This timer adds a support for windowed watchdog

  mode, which will signal an error if it is pinged outside the watchdog

  time window, meaning either too early or too late. The error signal

  generated can be routed to either interrupt a safety controller or

  to directly reset the SoC.

allOf:

  - $ref: "watchdog.yaml#"

properties:

  compatible:

    enum:

      - ti,j7-rti-wdt

  reg:

    maxItems: 1

  clocks:

    maxItems: 1

  power-domains:

    maxItems: 1

  assigned-clocks:

    maxItems: 1

  assigned-clocks-parents:

    maxItems: 1

required:

  - compatible

  - reg

  - clocks

  - power-domains

examples:

  - |

    /*

     * RTI WDT in main domain on J721e SoC. Assigned clocks are used to

     * select the source clock for the watchdog, forcing it to tick with

     * a 32kHz clock in this case.

     */

    #include <dt-bindings/soc/ti,sci_pm_domain.h>

    watchdog0: rti@2200000 {

        compatible = "ti,rti-wdt";

        reg = <0x0 0x2200000 0x0 0x100>;

        clocks = <&k3_clks 252 1>;

        power-domains = <&k3_pds 252 TI_SCI_PD_EXCLUSIVE>;

        assigned-clocks = <&k3_clks 252 1>;

        assigned-clock-parents = <&k3_clks 252 5>;

    };