pinctrl: stmfx: Use irqchip template

This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit calls to gpiochip_irqchip_add_nested() and
gpiochip_set_nested_irqchip(). The irqchip is instead
added while adding the gpiochip.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Amelie Delaunay <amelie.delaunay@st.com>
Cc: Benjamin Gaignard <benjamin.gaignard@st.com>
Link: https://lore.kernel.org/r/20200721131814.357182-1-linus.walleij@linaro.org

drivers/pinctrl/pinctrl-stmfx.c

@@ -616,6 +616,7 @@ static int stmfx_pinctrl_probe(struct platform_device *pdev)
 	struct stmfx *stmfx = dev_get_drvdata(pdev->dev.parent);
 	struct device_node *np = pdev->dev.of_node;
 	struct stmfx_pinctrl *pctl;
+	struct gpio_irq_chip *girq;
 	int irq, ret;
 
 	pctl = devm_kzalloc(stmfx->dev, sizeof(*pctl), GFP_KERNEL);
@@ -674,16 +675,6 @@ static int stmfx_pinctrl_probe(struct platform_device *pdev)
 	pctl->gpio_chip.can_sleep = true;
 	pctl->gpio_chip.of_node = np;
 
-	ret = devm_gpiochip_add_data(pctl->dev, &pctl->gpio_chip, pctl);
-	if (ret) {
-		dev_err(pctl->dev, "gpio_chip registration failed\n");
-		return ret;
-	}
-
-	ret = stmfx_pinctrl_gpio_function_enable(pctl);
-	if (ret)
-		return ret;
-
 	pctl->irq_chip.name = dev_name(pctl->dev);
 	pctl->irq_chip.irq_mask = stmfx_pinctrl_irq_mask;
 	pctl->irq_chip.irq_unmask = stmfx_pinctrl_irq_unmask;
@@ -693,13 +684,26 @@ static int stmfx_pinctrl_probe(struct platform_device *pdev)
 	pctl->irq_chip.irq_request_resources = stmfx_gpio_irq_request_resources;
 	pctl->irq_chip.irq_release_resources = stmfx_gpio_irq_release_resources;
 
-	ret = gpiochip_irqchip_add_nested(&pctl->gpio_chip, &pctl->irq_chip,
-					  0, handle_bad_irq, IRQ_TYPE_NONE);
+	girq = &pctl->gpio_chip.irq;
+	girq->chip = &pctl->irq_chip;
+	/* This will let us handle the parent IRQ in the driver */
+	girq->parent_handler = NULL;
+	girq->num_parents = 0;
+	girq->parents = NULL;
+	girq->default_type = IRQ_TYPE_NONE;
+	girq->handler = handle_bad_irq;
+	girq->threaded = true;
+
+	ret = devm_gpiochip_add_data(pctl->dev, &pctl->gpio_chip, pctl);
 	if (ret) {
-		dev_err(pctl->dev, "cannot add irqchip to gpiochip\n");
+		dev_err(pctl->dev, "gpio_chip registration failed\n");
 		return ret;
 	}
 
+	ret = stmfx_pinctrl_gpio_function_enable(pctl);
+	if (ret)
+		return ret;
+
 	ret = devm_request_threaded_irq(pctl->dev, irq, NULL,
 					stmfx_pinctrl_irq_thread_fn,
 					IRQF_ONESHOT,
@@ -709,8 +713,6 @@ static int stmfx_pinctrl_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	gpiochip_set_nested_irqchip(&pctl->gpio_chip, &pctl->irq_chip, irq);
-
 	dev_info(pctl->dev,
 		 "%ld GPIOs available\n", hweight_long(pctl->gpio_valid_mask));