[PATCH v5 6/6] pinctrl: meson: Replace custom code by gpiochip_node_count() call

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Neil Armstrong <narmstrong@baylibre.com>,
	linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: Linus Walleij <linus.walleij@linaro.org>,
	Kevin Hilman <khilman@baylibre.com>,
	Jerome Brunet <jbrunet@baylibre.com>,
	Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Gregory Clement <gregory.clement@bootlin.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
	Bartosz Golaszewski <brgl@bgdev.pl>,
	Marek Szyprowski <m.szyprowski@samsung.com>
Subject: [PATCH v5 6/6] pinctrl: meson: Replace custom code by gpiochip_node_count() call
Date: Thu, 14 Apr 2022 22:02:42 +0300	[thread overview]
Message-ID: <20220414190242.22178-7-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <20220414190242.22178-1-andriy.shevchenko@linux.intel.com>

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

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/pinctrl/meson/pinctrl-meson.c | 28 ++++++++++++---------------
 1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c
index 5b46a0979db7..cc2cd73ff8f9 100644
--- a/drivers/pinctrl/meson/pinctrl-meson.c
+++ b/drivers/pinctrl/meson/pinctrl-meson.c
@@ -49,6 +49,7 @@
 #include <linux/pinctrl/pinctrl.h>
 #include <linux/pinctrl/pinmux.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/regmap.h>
 #include <linux/seq_file.h>
 
@@ -662,27 +663,22 @@ static struct regmap *meson_map_resource(struct meson_pinctrl *pc,
 	return devm_regmap_init_mmio(pc->dev, base, &meson_regmap_config);
 }
 
-static int meson_pinctrl_parse_dt(struct meson_pinctrl *pc,
-				  struct device_node *node)
+static int meson_pinctrl_parse_dt(struct meson_pinctrl *pc)
 {
-	struct device_node *np, *gpio_np = NULL;
+	struct device_node *gpio_np;
+	unsigned int chips;
 
-	for_each_child_of_node(node, np) {
-		if (!of_find_property(np, "gpio-controller", NULL))
-			continue;
-		if (gpio_np) {
-			dev_err(pc->dev, "multiple gpio nodes\n");
-			of_node_put(np);
-			return -EINVAL;
-		}
-		gpio_np = np;
-	}
-
-	if (!gpio_np) {
+	chips = gpiochip_node_count(pc->dev);
+	if (!chips) {
 		dev_err(pc->dev, "no gpio node found\n");
 		return -EINVAL;
 	}
+	if (chips > 1) {
+		dev_err(pc->dev, "multiple gpio nodes\n");
+		return -EINVAL;
+	}
 
+	gpio_np = to_of_node(gpiochip_node_get_first(pc->dev));
 	pc->of_node = gpio_np;
 
 	pc->reg_mux = meson_map_resource(pc, gpio_np, "mux");
@@ -751,7 +747,7 @@ int meson_pinctrl_probe(struct platform_device *pdev)
 	pc->dev = dev;
 	pc->data = (struct meson_pinctrl_data *) of_device_get_match_data(dev);
 
-	ret = meson_pinctrl_parse_dt(pc, dev->of_node);
+	ret = meson_pinctrl_parse_dt(pc);
 	if (ret)
 		return ret;
 
-- 
2.35.1

