Zynq7000

Zynq7000 platform device-tree can be found in https://github.com/Xilinx/device-tree-xlnx/blob/xlnx_rel_v2021.2/device_tree/data/kernel_dtsi/2021.2/zynq/zynq-7000.dtsi#L455-L462

watchdog0: watchdog@f8005000 {
        clocks = <&clkc45>;
        compatible = "cdns,wdt-r1p2";
        interrupt-parent = <&&intc>;
        interrupts = <0 9 1>;
        reg = <0xf8005000 0x1000>;
        timeout-sec = <10>;
};

Modify the device tree in <plnx-proj-root>/project-spec/meta-user/recipes-bsp/device-tree/files/system-user.dtsi as below and rebuild your project.

&watchdog0 {
    status = "okay";
};

If user want the watchdog to trigger a software reset/reboot upon time out then add "reset-on-timeout" in device tree node.

&watchdog0 {
    status = "okay";
    reset-on-timeout;
};