pinctrl: iproc: Set irq handler based on trig type

Rather than always using handle_simple_irq() as the gpio_irq_chip
handler, set a more appropriate handler based on the IRQ trigger type
requested.
This is important for level triggered interrupts which need to be
masked during handling.

Signed-off-by: Hamish Martin <hamish.martin@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20191215210503.15488-2-hamish.martin@alliedtelesis.co.nz
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/bcm/pinctrl-iproc-gpio.c

@@ -286,6 +286,12 @@ static int iproc_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 	iproc_set_bit(chip, IPROC_GPIO_INT_DE_OFFSET, gpio, dual_edge);
 	iproc_set_bit(chip, IPROC_GPIO_INT_EDGE_OFFSET, gpio,
 		       rising_or_high);
+
+	if (type & IRQ_TYPE_EDGE_BOTH)
+		irq_set_handler_locked(d, handle_edge_irq);
+	else
+		irq_set_handler_locked(d, handle_level_irq);
+
 	raw_spin_unlock_irqrestore(&chip->lock, flags);
 
 	dev_dbg(chip->dev,
@@ -868,7 +874,7 @@ static int iproc_gpio_probe(struct platform_device *pdev)
 			return -ENOMEM;
 		girq->parents[0] = irq;
 		girq->default_type = IRQ_TYPE_NONE;
-		girq->handler = handle_simple_irq;
+		girq->handler = handle_bad_irq;
 	}
 
 	ret = gpiochip_add_data(gc, chip);