external watchdog on GPIO output - Raspberry Pi Forums

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in linux possible redirect kernel watchdog module ticking gpio (external hw watchdog) instead of build in hw watchdog on motherboard.
see:
https://www.kernel.org/doc/documentatio ... io-wdt.txt
https://cateee.net/lkddb/web-lkddb/gpio_watchdog.html

possible same setting using watchdog have found in /boot/overlays/ ?

example code above mentioned link:

code: select all

	watchdog: watchdog { 		/* adm706 */ 		compatible = "linux,wdt-gpio"; 		gpios = <&gpio3 9 gpio_active_low>; 		hw_algo = "toggle"; 		hw_margin_ms = <1600>; 	};

your question ambiguous - watchdog want use, , how want control it?


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