linux-kernel - [PATCH] hwmon: Use of_property_present() for testing DT property presence

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Message-Id: <20230310144706.1542434-1-robh@kernel.org>
Date:   Fri, 10 Mar 2023 08:47:06 -0600
From:   Rob Herring <robh@...nel.org>
To:     Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     devicetree@...r.kernel.org, linux-hwmon@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] hwmon: Use of_property_present() for testing DT property presence

It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties. As
part of this, convert of_get_property/of_find_property calls to the
recently added of_property_present() helper when we just want to test
for presence of a property and nothing more.

Signed-off-by: Rob Herring <robh@...nel.org>
---
 drivers/hwmon/ibmpowernv.c | 4 ++--
 drivers/hwmon/pwm-fan.c    | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/hwmon/ibmpowernv.c b/drivers/hwmon/ibmpowernv.c
index 8e3724728cce..594254d6a72d 100644
--- a/drivers/hwmon/ibmpowernv.c
+++ b/drivers/hwmon/ibmpowernv.c
@@ -456,9 +456,9 @@ static int populate_attr_groups(struct platform_device *pdev)
 		 */
 		if (!of_property_read_string(np, "label", &label))
 			sensor_groups[type].attr_count++;
-		if (of_find_property(np, "sensor-data-min", NULL))
+		if (of_property_present(np, "sensor-data-min"))
 			sensor_groups[type].attr_count++;
-		if (of_find_property(np, "sensor-data-max", NULL))
+		if (of_property_present(np, "sensor-data-max"))
 			sensor_groups[type].attr_count++;
 	}
 
diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c
index 83a347ca35da..57928d270015 100644
--- a/drivers/hwmon/pwm-fan.c
+++ b/drivers/hwmon/pwm-fan.c
@@ -427,7 +427,7 @@ static int pwm_fan_of_get_cooling_data(struct device *dev,
 	struct device_node *np = dev->of_node;
 	int num, i, ret;
 
-	if (!of_find_property(np, "cooling-levels", NULL))
+	if (!of_property_present(np, "cooling-levels"))
 		return 0;
 
 	ret = of_property_count_u32_elems(np, "cooling-levels");
-- 
2.39.2