WDTLOCK
writel_relaxed(UNLOCK, wdt->base + WDTLOCK);
readl_relaxed(wdt->base + WDTLOCK);
writel_relaxed(UNLOCK, wdt->base + WDTLOCK);
writel_relaxed(LOCK, wdt->base + WDTLOCK);
readl_relaxed(wdt->base + WDTLOCK);
writel_relaxed(UNLOCK, wdt->base + WDTLOCK);
writel_relaxed(LOCK, wdt->base + WDTLOCK);
readl_relaxed(wdt->base + WDTLOCK);