RETU_WDT_MAX_TIMER
retu_wdt->timeout = RETU_WDT_MAX_TIMER;
retu_wdt->max_timeout = RETU_WDT_MAX_TIMER;
retu_write(wdev->rdev, RETU_REG_WATCHDOG, RETU_WDT_MAX_TIMER);
round_jiffies_relative(RETU_WDT_MAX_TIMER * HZ / 2));
retu_write(wdev->rdev, RETU_REG_WATCHDOG, RETU_WDT_MAX_TIMER);