regulator: 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@kernel.org>
Link: https://lore.kernel.org/r/20230310144721.1544756-1-robh@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: robherring

drivers/regulator/bd71815-regulator.c

@@ -201,10 +201,10 @@ static int buck12_set_hw_dvs_levels(struct device_node *np,
 
 	data = container_of(desc, struct bd71815_regulator, desc);
 
-	if (of_find_property(np, "rohm,dvs-run-voltage", NULL) ||
-	    of_find_property(np, "rohm,dvs-suspend-voltage", NULL) ||
-	    of_find_property(np, "rohm,dvs-lpsr-voltage", NULL) ||
-	    of_find_property(np, "rohm,dvs-snvs-voltage", NULL)) {
+	if (of_property_present(np, "rohm,dvs-run-voltage") ||
+	    of_property_present(np, "rohm,dvs-suspend-voltage") ||
+	    of_property_present(np, "rohm,dvs-lpsr-voltage") ||
+	    of_property_present(np, "rohm,dvs-snvs-voltage")) {
 		ret = regmap_read(cfg->regmap, desc->vsel_reg, &val);
 		if (ret)
 			return ret;

drivers/regulator/fixed.c

@@ -151,7 +151,7 @@ of_get_fixed_voltage_config(struct device *dev,
 	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
 	of_property_read_u32(np, "off-on-delay-us", &config->off_on_delay);
 
-	if (of_find_property(np, "vin-supply", NULL))
+	if (of_property_present(np, "vin-supply"))
 		config->input_supply = "vin";
 
 	return config;

drivers/regulator/gpio-regulator.c

@@ -220,7 +220,7 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
 				 regtype);
 	}
 
-	if (of_find_property(np, "vin-supply", NULL))
+	if (of_property_present(np, "vin-supply"))
 		config->input_supply = "vin";
 
 	return config;

drivers/regulator/pwm-regulator.c

@@ -334,7 +334,7 @@ static int pwm_regulator_probe(struct platform_device *pdev)
 
 	memcpy(&drvdata->desc, &pwm_regulator_desc, sizeof(drvdata->desc));
 
-	if (of_find_property(np, "voltage-table", NULL))
+	if (of_property_present(np, "voltage-table"))
 		ret = pwm_regulator_init_table(pdev, drvdata);
 	else
 		ret = pwm_regulator_init_continuous(pdev, drvdata);