irq_get_chip
if (irq_get_chip(irq) != &cpu_interrupt_type)
chip = irq_get_chip(irq);
gpio_unbanked = *irq_get_chip(irq);
struct irq_chip *chip = irq_get_chip(chip_data->parent_irq);
irq_get_chip(irq)->irq_unmask(irq_get_irq_data(irq));
irq_get_chip(irq)->irq_mask(irq_get_irq_data(irq));
struct irq_chip *chip = irq_get_chip(irq);
irq_set_chip_and_handler_name(irq, irq_get_chip(entry->pirq),