Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) * GPIO-controlled Watchdog
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) Required Properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) - compatible: Should contain "linux,wdt-gpio".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) - gpios: From common gpio binding; gpio connection to WDT reset pin.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) - hw_algo: The algorithm used by the driver. Should be one of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)   following values:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)   - toggle: Either a high-to-low or a low-to-high transition clears
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)     the WDT counter. The watchdog timer is disabled when GPIO is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)     left floating or connected to a three-state buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)   - level: Low or high level starts counting WDT timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)     the opposite level disables the WDT. Active level is determined
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)     by the GPIO flags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) - hw_margin_ms: Maximum time to reset watchdog circuit (milliseconds).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) Optional Properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) - always-running: If the watchdog timer cannot be disabled, add this flag to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)   have the driver keep toggling the signal without a client. It will only cease
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)   to toggle the signal when the device is open and the timeout elapsed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) Example:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	watchdog: watchdog {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		/* ADM706 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		compatible = "linux,wdt-gpio";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		gpios = <&gpio3 9 GPIO_ACTIVE_LOW>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		hw_algo = "toggle";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		hw_margin_ms = <1600>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	};