linux-kernel - [PATCH v1 5/5] pinctrl: armada-37xx: Replace custom code by gpiochip

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Message-Id: <20220325200338.54270-5-andriy.shevchenko@linux.intel.com>
Date:   Fri, 25 Mar 2022 22:03:38 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Gregory CLEMENT <gregory.clement@...tlin.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Fabien Dessenne <fabien.dessenne@...s.st.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Bartosz Golaszewski <brgl@...ev.pl>
Subject: [PATCH v1 5/5] pinctrl: armada-37xx: Replace custom code by gpiochip_count() call

Since we have generic function to count GPIO controller nodes
under given device, there is no need to open code it. Replace
custom code by gpiochip_count() call.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 24 +++++++++------------
 1 file changed, 10 insertions(+), 14 deletions(-)

diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
index 08cad14042e2..ba94125f6566 100644
--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
@@ -728,22 +728,18 @@ static int armada_37xx_irqchip_register(struct platform_device *pdev,
 	struct gpio_irq_chip *girq = &gc->irq;
 	struct device *dev = &pdev->dev;
 	struct device_node *np;
-	int ret = -ENODEV, i, nr_irq_parent;
+	unsigned int nr_child_nodes, i;
+	int ret;
 
 	/* Check if we have at least one gpio-controller child node */
-	for_each_child_of_node(dev->of_node, np) {
-		if (of_property_read_bool(np, "gpio-controller")) {
-			ret = 0;
-			break;
-		}
-	}
-	if (ret)
-		return dev_err_probe(dev, ret, "no gpio-controller child node\n");
+	nr_child_nodes = gpiochip_count(dev);
+	if (!nr_child_nodes)
+		return dev_err_probe(dev, -ENODEV, "no gpio-controller child node\n");
 
-	nr_irq_parent = of_irq_count(np);
 	spin_lock_init(&info->irq_lock);
 
-	if (!nr_irq_parent) {
+	nr_child_nodes = of_irq_count(np);
+	if (!nr_child_nodes) {
 		dev_err(dev, "invalid or no IRQ\n");
 		return 0;
 	}
@@ -766,11 +762,11 @@ static int armada_37xx_irqchip_register(struct platform_device *pdev,
 	 * controller. But we do not take advantage of this and use
 	 * the chained irq with all of them.
 	 */
-	girq->num_parents = nr_irq_parent;
-	girq->parents = devm_kcalloc(dev, nr_irq_parent, sizeof(*girq->parents), GFP_KERNEL);
+	girq->num_parents = nr_child_nodes;
+	girq->parents = devm_kcalloc(dev, nr_child_nodes, sizeof(*girq->parents), GFP_KERNEL);
 	if (!girq->parents)
 		return -ENOMEM;
-	for (i = 0; i < nr_irq_parent; i++) {
+	for (i = 0; i < nr_child_nodes; i++) {
 		int irq = irq_of_parse_and_map(np, i);
 
 		if (irq < 0)
-- 
2.35.1