linux-kernel - [PATCH v4 11/13] pinctrl: meson: Replace custom code by gpiochip_node

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Message-Id: <20220401103604.8705-12-andriy.shevchenko@linux.intel.com>
Date:   Fri,  1 Apr 2022 13:36:02 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Qianggui Song <qianggui.song@...ogic.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Marc Zyngier <maz@...nel.org>,
        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,
        openbmc@...ts.ozlabs.org, linux-renesas-soc@...r.kernel.org,
        linux-samsung-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>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Philipp Zabel <p.zabel@...gutronix.de>
Subject: [PATCH v4 11/13] pinctrl: meson: Replace custom code by gpiochip_node_count() call

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@...ux.intel.com>
Reviewed-by: Neil Armstrong <narmstrong@...libre.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..1b078da81523 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(device_get_named_child_node(pc->dev, "gpio-controller"));
 	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