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AM4378: wdt-gpio issue

Part Number: AM4378
Other Parts Discussed in Thread: TPS3431

In one of the project i am working on, the custom hardware has external watch dog chip TPS3431SDRBR. Based on recommendation i created DTS binding for this peripheral as "wdt-gpio". Please refer the way DTS has been mapped for this peripheral

    watchdog: watchdog {
    /* TPS3431 */
    compatible = "linux,wdt-gpio";
    gpios = <&gpio2 3 GPIO_ACTIVE_LOW>;
    hw_algo = "toggle";
    always-running;
    hw_margin_ms = <100>;
    status = "okay";
    };

Based on this binding, i expect the gpio2_3 to toggle at given rate.

kernel Configuration i added for this is 

CONFIG_WATCHDOG=y
CONFIG_WDT=y

I do not see any activity on GPIO2_3 plus i do not see any errors as part of dmesg logs

Any suggestion or thoughts to resolve this.