IP27_RT_TIMER_IRQ
cd->irq = IP27_RT_TIMER_IRQ;
enable_percpu_irq(IP27_RT_TIMER_IRQ, IRQ_TYPE_NONE);
irq_set_handler(IP27_RT_TIMER_IRQ, handle_percpu_devid_irq);
irq_set_percpu_devid(IP27_RT_TIMER_IRQ);
WARN_ON(request_percpu_irq(IP27_RT_TIMER_IRQ, hub_rt_counter_handler,