void vr41xx_set_irq_trigger()

in gpio-vr41xx.c [225:301]

• 76 lines of code
• 13 McCabe index (conditional complexity)

void vr41xx_set_irq_trigger(unsigned int pin, irq_trigger_t trigger,
			    irq_signal_t signal)
{
	u16 mask;

	if (pin < GIUINT_HIGH_OFFSET) {
		mask = 1 << pin;
		if (trigger != IRQ_TRIGGER_LEVEL) {
			giu_set(GIUINTTYPL, mask);
			if (signal == IRQ_SIGNAL_HOLD)
				giu_set(GIUINTHTSELL, mask);
			else
				giu_clear(GIUINTHTSELL, mask);
			if (giu_flags & GPIO_HAS_INTERRUPT_EDGE_SELECT) {
				switch (trigger) {
				case IRQ_TRIGGER_EDGE_FALLING:
					giu_set(GIUFEDGEINHL, mask);
					giu_clear(GIUREDGEINHL, mask);
					break;
				case IRQ_TRIGGER_EDGE_RISING:
					giu_clear(GIUFEDGEINHL, mask);
					giu_set(GIUREDGEINHL, mask);
					break;
				default:
					giu_set(GIUFEDGEINHL, mask);
					giu_set(GIUREDGEINHL, mask);
					break;
				}
			}
			irq_set_chip_and_handler(GIU_IRQ(pin),
						 &giuint_low_irq_chip,
						 handle_edge_irq);
		} else {
			giu_clear(GIUINTTYPL, mask);
			giu_clear(GIUINTHTSELL, mask);
			irq_set_chip_and_handler(GIU_IRQ(pin),
						 &giuint_low_irq_chip,
						 handle_level_irq);
		}
		giu_write(GIUINTSTATL, mask);
	} else if (pin < GIUINT_HIGH_MAX) {
		mask = 1 << (pin - GIUINT_HIGH_OFFSET);
		if (trigger != IRQ_TRIGGER_LEVEL) {
			giu_set(GIUINTTYPH, mask);
			if (signal == IRQ_SIGNAL_HOLD)
				giu_set(GIUINTHTSELH, mask);
			else
				giu_clear(GIUINTHTSELH, mask);
			if (giu_flags & GPIO_HAS_INTERRUPT_EDGE_SELECT) {
				switch (trigger) {
				case IRQ_TRIGGER_EDGE_FALLING:
					giu_set(GIUFEDGEINHH, mask);
					giu_clear(GIUREDGEINHH, mask);
					break;
				case IRQ_TRIGGER_EDGE_RISING:
					giu_clear(GIUFEDGEINHH, mask);
					giu_set(GIUREDGEINHH, mask);
					break;
				default:
					giu_set(GIUFEDGEINHH, mask);
					giu_set(GIUREDGEINHH, mask);
					break;
				}
			}
			irq_set_chip_and_handler(GIU_IRQ(pin),
						 &giuint_high_irq_chip,
						 handle_edge_irq);
		} else {
			giu_clear(GIUINTTYPH, mask);
			giu_clear(GIUINTHTSELH, mask);
			irq_set_chip_and_handler(GIU_IRQ(pin),
						 &giuint_high_irq_chip,
						 handle_level_irq);
		}
		giu_write(GIUINTSTATH, mask);
	}
}