[PATCH v2 1/1] hwmon: (adt7475) Convert to use hwmon_device_register_with_groups()

[Grant McEwan <grant.mcewan@alliedtelesis.co.nz>]

hwmon_device_register() is a deprecated function and produces a warning.

Converting the driver to use the hwmon_device_register_with_groups()
instead.

Signed-off-by: Grant McEwan <grant.mcewan@alliedtelesis.co.nz>
---
 drivers/hwmon/adt7475.c | 146 ++++++++++++++--------------------------
 1 file changed, 50 insertions(+), 96 deletions(-)

diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c
index c3c6031a7285..6c64d50c9aae 100644
--- a/drivers/hwmon/adt7475.c
+++ b/drivers/hwmon/adt7475.c
@@ -187,7 +187,7 @@ static const struct of_device_id __maybe_unused adt7475_of_match[] = {
 MODULE_DEVICE_TABLE(of, adt7475_of_match);
 
 struct adt7475_data {
-	struct device *hwmon_dev;
+	struct i2c_client *client;
 	struct mutex lock;
 
 	unsigned long measure_updated;
@@ -212,6 +212,7 @@ struct adt7475_data {
 
 	u8 vid;
 	u8 vrm;
+	const struct attribute_group *groups[9];
 };
 
 static struct i2c_driver adt7475_driver;
@@ -346,8 +347,8 @@ static ssize_t voltage_store(struct device *dev,
 {
 
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	unsigned char reg;
 	long val;
 
@@ -440,8 +441,8 @@ static ssize_t temp_store(struct device *dev, struct device_attribute *attr,
 			  const char *buf, size_t count)
 {
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	unsigned char reg = 0;
 	u8 out;
 	int temp;
@@ -542,8 +543,7 @@ static ssize_t temp_st_show(struct device *dev, struct device_attribute *attr,
 			    char *buf)
 {
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
 	long val;
 
 	switch (sattr->index) {
@@ -570,8 +570,8 @@ static ssize_t temp_st_store(struct device *dev,
 			     size_t count)
 {
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	unsigned char reg;
 	int shift, idx;
 	ulong val;
@@ -647,8 +647,8 @@ static ssize_t point2_show(struct device *dev, struct device_attribute *attr,
 static ssize_t point2_store(struct device *dev, struct device_attribute *attr,
 			    const char *buf, size_t count)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 	int temp;
 	long val;
@@ -710,8 +710,8 @@ static ssize_t tach_store(struct device *dev, struct device_attribute *attr,
 {
 
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	unsigned long val;
 
 	if (kstrtoul(buf, 10, &val))
@@ -769,8 +769,8 @@ static ssize_t pwm_store(struct device *dev, struct device_attribute *attr,
 {
 
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	unsigned char reg = 0;
 	long val;
 
@@ -818,8 +818,8 @@ static ssize_t stall_disable_show(struct device *dev,
 				  struct device_attribute *attr, char *buf)
 {
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+
 	u8 mask = BIT(5 + sattr->index);
 
 	return sprintf(buf, "%d\n", !!(data->enh_acoustics[0] & mask));
@@ -830,8 +830,8 @@ static ssize_t stall_disable_store(struct device *dev,
 				   const char *buf, size_t count)
 {
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long val;
 	u8 mask = BIT(5 + sattr->index);
 
@@ -914,8 +914,8 @@ static ssize_t pwmchan_store(struct device *dev,
 			     size_t count)
 {
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	int r;
 	long val;
 
@@ -938,8 +938,8 @@ static ssize_t pwmctrl_store(struct device *dev,
 			     size_t count)
 {
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	int r;
 	long val;
 
@@ -982,8 +982,8 @@ static ssize_t pwmfreq_store(struct device *dev,
 			     size_t count)
 {
 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	int out;
 	long val;
 
@@ -1022,8 +1022,8 @@ static ssize_t pwm_use_point2_pwm_at_crit_store(struct device *dev,
 					struct device_attribute *devattr,
 					const char *buf, size_t count)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long val;
 
 	if (kstrtol(buf, 10, &val))
@@ -1342,26 +1342,6 @@ static int adt7475_detect(struct i2c_client *client,
 	return 0;
 }
 
-static void adt7475_remove_files(struct i2c_client *client,
-				 struct adt7475_data *data)
-{
-	sysfs_remove_group(&client->dev.kobj, &adt7475_attr_group);
-	if (data->has_fan4)
-		sysfs_remove_group(&client->dev.kobj, &fan4_attr_group);
-	if (data->has_pwm2)
-		sysfs_remove_group(&client->dev.kobj, &pwm2_attr_group);
-	if (data->has_voltage & (1 << 0))
-		sysfs_remove_group(&client->dev.kobj, &in0_attr_group);
-	if (data->has_voltage & (1 << 3))
-		sysfs_remove_group(&client->dev.kobj, &in3_attr_group);
-	if (data->has_voltage & (1 << 4))
-		sysfs_remove_group(&client->dev.kobj, &in4_attr_group);
-	if (data->has_voltage & (1 << 5))
-		sysfs_remove_group(&client->dev.kobj, &in5_attr_group);
-	if (data->has_vid)
-		sysfs_remove_group(&client->dev.kobj, &vid_attr_group);
-}
-
 static int adt7475_update_limits(struct i2c_client *client)
 {
 	struct adt7475_data *data = i2c_get_clientdata(client);
@@ -1489,7 +1469,8 @@ static int adt7475_probe(struct i2c_client *client,
 	};
 
 	struct adt7475_data *data;
-	int i, ret = 0, revision;
+	struct device *hwmon_dev;
+	int i, ret = 0, revision, group_num = 0;
 	u8 config2, config3;
 
 	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
@@ -1497,6 +1478,7 @@ static int adt7475_probe(struct i2c_client *client,
 		return -ENOMEM;
 
 	mutex_init(&data->lock);
+	data->client = client;
 	i2c_set_clientdata(client, data);
 
 	if (client->dev.of_node)
@@ -1590,52 +1572,40 @@ static int adt7475_probe(struct i2c_client *client,
 		break;
 	}
 
-	ret = sysfs_create_group(&client->dev.kobj, &adt7475_attr_group);
-	if (ret)
-		return ret;
+	data->groups[group_num++] = &adt7475_attr_group;
 
 	/* Features that can be disabled individually */
 	if (data->has_fan4) {
-		ret = sysfs_create_group(&client->dev.kobj, &fan4_attr_group);
-		if (ret)
-			goto eremove;
+		data->groups[group_num++] = &fan4_attr_group;
 	}
 	if (data->has_pwm2) {
-		ret = sysfs_create_group(&client->dev.kobj, &pwm2_attr_group);
-		if (ret)
-			goto eremove;
+		data->groups[group_num++] = &pwm2_attr_group;
 	}
 	if (data->has_voltage & (1 << 0)) {
-		ret = sysfs_create_group(&client->dev.kobj, &in0_attr_group);
-		if (ret)
-			goto eremove;
+		data->groups[group_num++] = &in0_attr_group;
 	}
 	if (data->has_voltage & (1 << 3)) {
-		ret = sysfs_create_group(&client->dev.kobj, &in3_attr_group);
-		if (ret)
-			goto eremove;
+		data->groups[group_num++] = &in3_attr_group;
 	}
 	if (data->has_voltage & (1 << 4)) {
-		ret = sysfs_create_group(&client->dev.kobj, &in4_attr_group);
-		if (ret)
-			goto eremove;
+		data->groups[group_num++] = &in4_attr_group;
 	}
 	if (data->has_voltage & (1 << 5)) {
-		ret = sysfs_create_group(&client->dev.kobj, &in5_attr_group);
-		if (ret)
-			goto eremove;
+		data->groups[group_num++] = &in5_attr_group;
 	}
 	if (data->has_vid) {
 		data->vrm = vid_which_vrm();
-		ret = sysfs_create_group(&client->dev.kobj, &vid_attr_group);
-		if (ret)
-			goto eremove;
+		data->groups[group_num] = &vid_attr_group;
 	}
 
-	data->hwmon_dev = hwmon_device_register(&client->dev);
-	if (IS_ERR(data->hwmon_dev)) {
-		ret = PTR_ERR(data->hwmon_dev);
-		goto eremove;
+	/* register device with all the acquired attributes */
+	hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
+							   client->name, data,
+							   data->groups);
+
+	if (IS_ERR(hwmon_dev)) {
+		ret = PTR_ERR(hwmon_dev);
+		return ret;
 	}
 
 	dev_info(&client->dev, "%s device, revision %d\n",
@@ -1657,21 +1627,7 @@ static int adt7475_probe(struct i2c_client *client,
 	/* Limits and settings, should never change update more than once */
 	ret = adt7475_update_limits(client);
 	if (ret)
-		goto eremove;
-
-	return 0;
-
-eremove:
-	adt7475_remove_files(client, data);
-	return ret;
-}
-
-static int adt7475_remove(struct i2c_client *client)
-{
-	struct adt7475_data *data = i2c_get_clientdata(client);
-
-	hwmon_device_unregister(data->hwmon_dev);
-	adt7475_remove_files(client, data);
+		return ret;
 
 	return 0;
 }
@@ -1683,7 +1639,6 @@ static struct i2c_driver adt7475_driver = {
 		.of_match_table = of_match_ptr(adt7475_of_match),
 	},
 	.probe		= adt7475_probe,
-	.remove		= adt7475_remove,
 	.id_table	= adt7475_id,
 	.detect		= adt7475_detect,
 	.address_list	= normal_i2c,
@@ -1757,8 +1712,8 @@ static void adt7475_read_pwm(struct i2c_client *client, int index)
 
 static int adt7475_update_measure(struct device *dev)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	u16 ext;
 	int i;
 	int ret;
@@ -1854,8 +1809,7 @@ static int adt7475_update_measure(struct device *dev)
 
 static struct adt7475_data *adt7475_update_device(struct device *dev)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7475_data *data = i2c_get_clientdata(client);
+	struct adt7475_data *data = dev_get_drvdata(dev);
 	int ret;
 
 	mutex_lock(&data->lock);
-- 
2.22.0