linux-kernel - [PATCH 2/2] hwmon: ina2xx: give precedence to DT over checking for platform data.

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Message-Id: <1445876673-32180-3-git-send-email-mtitinger@baylibre.com>
Date:	Mon, 26 Oct 2015 17:24:33 +0100
From:	Marc Titinger <mtitinger@...libre.com>
To:	linux@...ck-us.net, jdelvare@...e.com
Cc:	lm-sensors@...sensors.org, linux-kernel@...r.kernel.org,
	Marc Titinger <mtitinger@...libre.com>
Subject: [PATCH 2/2] hwmon: ina2xx: give precedence to DT over checking for platform data.

when checking for the value of the shunt resistor.

Signed-off-by: Marc Titinger <mtitinger@...libre.com>
---
 drivers/hwmon/ina2xx.c | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/drivers/hwmon/ina2xx.c b/drivers/hwmon/ina2xx.c
index 3edd163..1946433 100644
--- a/drivers/hwmon/ina2xx.c
+++ b/drivers/hwmon/ina2xx.c
@@ -414,7 +414,6 @@ static const struct attribute_group ina226_group = {
 static int ina2xx_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
-	struct ina2xx_platform_data *pdata;
 	struct device *dev = &client->dev;
 	struct ina2xx_data *data;
 	struct device *hwmon_dev;
@@ -425,14 +424,13 @@ static int ina2xx_probe(struct i2c_client *client,
 	if (!data)
 		return -ENOMEM;
 
-	if (dev_get_platdata(dev)) {
-		pdata = dev_get_platdata(dev);
-		data->rshunt = pdata->shunt_uohms;
-	} else if (!of_property_read_u32(dev->of_node,
-					 "shunt-resistor", &val)) {
-		data->rshunt = val;
-	} else {
-		data->rshunt = INA2XX_RSHUNT_DEFAULT;
+	if (of_property_read_u32(dev->of_node, "shunt-resistor", &val) < 0) {
+		struct ina2xx_platform_data *pdata = dev_get_platdata(dev);
+
+		if (pdata)
+			val = pdata->shunt_uohms;
+		else
+			val = INA2XX_RSHUNT_DEFAULT;
 	}
 
 	/* set the device type */
@@ -440,10 +438,11 @@ static int ina2xx_probe(struct i2c_client *client,
 	data->config = &ina2xx_config[data->kind];
 	data->client = client;
 
-	if (data->rshunt <= 0 ||
-	    data->rshunt > data->config->calibration_factor)
+	if (val <= 0 || val > data->config->calibration_factor)
 		return -ENODEV;
 
+	data->rshunt = val;
+
 	ina2xx_regmap_config.max_register = data->config->registers;
 
 	data->regmap = devm_regmap_init_i2c(client, &ina2xx_regmap_config);
-- 
1.9.1

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