i2c: pca-platform: use device_property_read_u32

Use device_property_read_u32 instead of of_property_read_u32_index to
lookup the "clock-frequency" property.
Signed-off-by: NChris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-pca-platform.c

@@ -177,16 +177,15 @@ static int i2c_pca_pf_probe(struct platform_device *pdev)
 	if (IS_ERR(i2c->gpio))
 		return PTR_ERR(i2c->gpio);
 
+	i2c->adap.timeout = HZ;
+	ret = device_property_read_u32(&pdev->dev, "clock-frequency",
+				       &i2c->algo_data.i2c_clock);
+	if (ret)
+		i2c->algo_data.i2c_clock = 59000;
+
 	if (platform_data) {
 		i2c->adap.timeout = platform_data->timeout;
 		i2c->algo_data.i2c_clock = platform_data->i2c_clock_speed;
-	} else if (np) {
-		i2c->adap.timeout = HZ;
-		of_property_read_u32_index(np, "clock-frequency", 0,
-					   &i2c->algo_data.i2c_clock);
-	} else {
-		i2c->adap.timeout = HZ;
-		i2c->algo_data.i2c_clock = 59000;
 	}
 
 	i2c->algo_data.data = i2c;