SL11H_IRQ_STATUS
irqstat = sl811_read(sl811, SL11H_IRQ_STATUS);
sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
sl811_read(sl811, SL11H_IRQ_STATUS));
irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP;
sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
sl811_write(sl811, SL11H_IRQ_STATUS, ~0);