IRQ_STS
dev_dbg(dev, ": IRQ_STS: %x", readl(acdev->vbase + IRQ_STS));
writel(mask, acdev->vbase + IRQ_STS);
irqsts = readl(acdev->vbase + IRQ_STS);
writel(irqsts, acdev->vbase + IRQ_STS); /* clear irqs */
case IRQ_STS: