【MA35D1】Linux下如何配置复位外部的Watch Dog

linux有自带的驱动：linux-custom/drivers/watchdog/gpio_wdt.c,

驱动说明：linux-custom/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt

1、dts配置参考：       

 watchdog: watchdog {

                /* io trigger watchdog */

                compatible = "linux,wdt-gpio";

                gpios = <&gpiok 7 GPIO_ACTIVE_LOW>;

                hw_algo = "toggle";

                hw_margin_ms = <1600>;

       };

2、打开配置文件：

make linux-menuconfig

Decice Drivers > watchdog Timer Support ->Watchdog device controlled though GPIO-line