pinctrl: pic32: Pass irqchip when adding gpiochip

We need to convert all old gpio irqchips to pass the irqchip
setup along when adding the gpio_chip. For more info see
drivers/gpio/TODO.

For chained irqchips this is a pretty straight-forward
conversion.

Cc: Joshua Henderson <joshua.henderson@microchip.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20190913113530.5536-2-linus.walleij@linaro.org

drivers/pinctrl/pinctrl-pic32.c

@@ -2203,6 +2203,7 @@ static int pic32_gpio_probe(struct platform_device *pdev)
 	u32 id;
 	int irq, ret;
 	struct resource *res;
+	struct gpio_irq_chip *girq;
 
 	if (of_property_read_u32(np, "microchip,gpio-bank", &id)) {
 		dev_err(&pdev->dev, "microchip,gpio-bank property not found\n");
@@ -2240,25 +2241,23 @@ static int pic32_gpio_probe(struct platform_device *pdev)
 
 	bank->gpio_chip.parent = &pdev->dev;
 	bank->gpio_chip.of_node = np;
+	girq = &bank->gpio_chip.irq;
+	girq->chip = &bank->irq_chip;
+	girq->parent_handler = pic32_gpio_irq_handler;
+	girq->num_parents = 1;
+	girq->parents = devm_kcalloc(&pdev->dev, 1, sizeof(*girq->parents),
+				     GFP_KERNEL);
+	if (!girq->parents)
+		return -ENOMEM;
+	girq->default_type = IRQ_TYPE_NONE;
+	girq->handler = handle_level_irq;
+	girq->parents[0] = irq;
 	ret = gpiochip_add_data(&bank->gpio_chip, bank);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "Failed to add GPIO chip %u: %d\n",
 			id, ret);
 		return ret;
 	}
-
-	ret = gpiochip_irqchip_add(&bank->gpio_chip, &bank->irq_chip,
-				0, handle_level_irq, IRQ_TYPE_NONE);
-	if (ret < 0) {
-		dev_err(&pdev->dev, "Failed to add IRQ chip %u: %d\n",
-			id, ret);
-		gpiochip_remove(&bank->gpio_chip);
-		return ret;
-	}
-
-	gpiochip_set_chained_irqchip(&bank->gpio_chip, &bank->irq_chip,
-				     irq, pic32_gpio_irq_handler);
-
 	return 0;
 }