项目用的开发ti-processor-sdk-linux-am335x-evm-05.00.00.15，linux内核版本是4.14，看门狗驱动是omap_wdt.c，但是menuconfig菜单中的Device driver->watchdog time support中（如下）并没有AM335x PSP WDT Driver User Guide文档中提到的<*> OMAP Watchdog选项，还有就是设备树该如何配置看门狗，谢谢！！
│ │ --- Watchdog Timer Support │ │
│ │ [*] WatchDog Timer Driver Core │ │
│ │ [ ] Disable watchdog shutdown on close │ │
│ │ [*] Update boot-enabled watchdog until userspace takes over │ │
│ │ [ ] Read different watchdog information through sysfs │ │
│ │ *** Watchdog Device Drivers *** │ │
│ │ < > Software watchdog │ │
│ │ < > Watchdog device controlled through GPIO-line │ │
│ │ < > ACPI Watchdog Action Table (WDAT) (NEW) │ │
│ │ < > Xilinx Watchdog timer
