linux-kernel - [RFC PATCH 2/8] hwmon: (ina209) Convert to devm_hwmon_device

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Date:	Sun, 17 Mar 2013 18:45:51 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	lm-sensors@...sensors.org, linux-kernel@...r.kernel.org
Cc:	Jean Delvare <khali@...ux-fr.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Guenter Roeck <linux@...ck-us.net>
Subject: [RFC PATCH 2/8] hwmon: (ina209) Convert to devm_hwmon_device_register API

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/hwmon/ina209.c |   29 +++++++++++++----------------
 1 file changed, 13 insertions(+), 16 deletions(-)

diff --git a/drivers/hwmon/ina209.c b/drivers/hwmon/ina209.c
index c6fdd5b..547935f 100644
--- a/drivers/hwmon/ina209.c
+++ b/drivers/hwmon/ina209.c
@@ -78,7 +78,7 @@ struct ina209_data {
 
 static struct ina209_data *ina209_update_device(struct device *dev)
 {
-	struct i2c_client *client = to_i2c_client(dev);
+	struct i2c_client *client = to_i2c_client(dev->parent);
 	struct ina209_data *data = i2c_get_clientdata(client);
 	struct ina209_data *ret = data;
 	s32 val;
@@ -234,7 +234,7 @@ static ssize_t ina209_set_interval(struct device *dev,
 				   struct device_attribute *da,
 				   const char *buf, size_t count)
 {
-	struct i2c_client *client = to_i2c_client(dev);
+	struct i2c_client *client = to_i2c_client(dev->parent);
 	struct ina209_data *data = ina209_update_device(dev);
 	long val;
 	u16 regval;
@@ -260,7 +260,7 @@ static ssize_t ina209_set_interval(struct device *dev,
 static ssize_t ina209_show_interval(struct device *dev,
 				    struct device_attribute *da, char *buf)
 {
-	struct i2c_client *client = to_i2c_client(dev);
+	struct i2c_client *client = to_i2c_client(dev->parent);
 	struct ina209_data *data = i2c_get_clientdata(client);
 
 	return snprintf(buf, PAGE_SIZE, "%d\n", data->update_interval);
@@ -285,7 +285,7 @@ static ssize_t ina209_reset_history(struct device *dev,
 				    const char *buf,
 				    size_t count)
 {
-	struct i2c_client *client = to_i2c_client(dev);
+	struct i2c_client *client = to_i2c_client(dev->parent);
 	struct ina209_data *data = i2c_get_clientdata(client);
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 	u32 mask = attr->index;
@@ -312,7 +312,7 @@ static ssize_t ina209_set_value(struct device *dev,
 				const char *buf,
 				size_t count)
 {
-	struct i2c_client *client = to_i2c_client(dev);
+	struct i2c_client *client = to_i2c_client(dev->parent);
 	struct ina209_data *data = ina209_update_device(dev);
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 	int reg = attr->index;
@@ -503,6 +503,11 @@ static const struct attribute_group ina209_group = {
 	.attrs = ina209_attributes,
 };
 
+static const struct attribute_group *ina209_groups[] = {
+	&ina209_group,
+	NULL
+};
+
 static void ina209_restore_conf(struct i2c_client *client,
 				struct ina209_data *data)
 {
@@ -581,21 +586,15 @@ static int ina209_probe(struct i2c_client *client,
 	if (ret)
 		return ret;
 
-	/* Register sysfs hooks */
-	ret = sysfs_create_group(&client->dev.kobj, &ina209_group);
-	if (ret)
-		goto out_restore_conf;
-
-	data->hwmon_dev = hwmon_device_register(&client->dev);
+	data->hwmon_dev = devm_hwmon_device_register(&client->dev,
+						     ina209_groups, id->name);
 	if (IS_ERR(data->hwmon_dev)) {
 		ret = PTR_ERR(data->hwmon_dev);
-		goto out_hwmon_device_register;
+		goto out_restore_conf;
 	}
 
 	return 0;
 
-out_hwmon_device_register:
-	sysfs_remove_group(&client->dev.kobj, &ina209_group);
 out_restore_conf:
 	ina209_restore_conf(client, data);
 	return ret;
@@ -605,8 +604,6 @@ static int ina209_remove(struct i2c_client *client)
 {
 	struct ina209_data *data = i2c_get_clientdata(client);
 
-	hwmon_device_unregister(data->hwmon_dev);
-	sysfs_remove_group(&client->dev.kobj, &ina209_group);
 	ina209_restore_conf(client, data);
 
 	return 0;
-- 
1.7.9.7

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