[PATCH 03/11] hwmon: (lm73) Convert to use devm_hwmon_device_register_with_groups

Guenter Roeck
2013-09-14T17:14:10Z

Also introduce new variable dev pointing to client->dev in the probe
function, and use new macro ATTRIBUTE_GROUPS to declare attribute groups.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
drivers/hwmon/lm73.c | 70 ++++++++++++++++----------------------------------
1 file changed, 22 insertions(+), 48 deletions(-)

diff --git a/drivers/hwmon/lm73.c b/drivers/hwmon/lm73.c
index 9bde964..9653bb8 100644
--- a/drivers/hwmon/lm73.c
+++ b/drivers/hwmon/lm73.c
@@ -55,7 +55,7 @@ static const unsigned short lm73_convrates[] = {
};

struct lm73_data {
- struct device *hwmon_dev;
+ struct i2c_client *client;
struct mutex lock;
u8 ctrl; /* control register value */
};
@@ -66,7 +66,7 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct i2c_client *client = to_i2c_client(dev);
+ struct lm73_data *data = dev_get_drvdata(dev);
long temp;
short value;
s32 err;
@@ -77,7 +77,7 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da,

/* Write value */
value = clamp_val(temp / 250, LM73_TEMP_MIN, LM73_TEMP_MAX) << 5;
- err = i2c_smbus_write_word_swapped(client, attr->index, value);
+ err = i2c_smbus_write_word_swapped(data->client, attr->index, value);
return (err < 0) ? err : count;
}

@@ -85,10 +85,10 @@ static ssize_t show_temp(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct i2c_client *client = to_i2c_client(dev);
+ struct lm73_data *data = dev_get_drvdata(dev);
int temp;

- s32 err = i2c_smbus_read_word_swapped(client, attr->index);
+ s32 err = i2c_smbus_read_word_swapped(data->client, attr->index);
if (err < 0)
return err;

@@ -101,8 +101,7 @@ static ssize_t show_temp(struct device *dev, struct device_attribute *da,
static ssize_t set_convrate(struct device *dev, struct device_attribute *da,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm73_data *data = i2c_get_clientdata(client);
+ struct lm73_data *data = dev_get_drvdata(dev);
unsigned long convrate;
s32 err;
int res = 0;
@@ -124,7 +123,8 @@ static ssize_t set_convrate(struct device *dev, struct device_attribute *da,
mutex_lock(&data->lock);
data->ctrl &= LM73_CTRL_TO_MASK;
data->ctrl |= res << LM73_CTRL_RES_SHIFT;
- err = i2c_smbus_write_byte_data(client, LM73_REG_CTRL, data->ctrl);
+ err = i2c_smbus_write_byte_data(data->client, LM73_REG_CTRL,
+ data->ctrl);
mutex_unlock(&data->lock);

if (err < 0)
@@ -136,8 +136,7 @@ static ssize_t set_convrate(struct device *dev, struct device_attribute *da,
static ssize_t show_convrate(struct device *dev, struct device_attribute *da,
char *buf)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm73_data *data = i2c_get_clientdata(client);
+ struct lm73_data *data = dev_get_drvdata(dev);
int res;

res = (data->ctrl & LM73_CTRL_RES_MASK) >> LM73_CTRL_RES_SHIFT;
@@ -147,13 +146,12 @@ static ssize_t show_convrate(struct device *dev, struct device_attribute *da,
static ssize_t show_maxmin_alarm(struct device *dev,
struct device_attribute *da, char *buf)
{
- struct i2c_client *client = to_i2c_client(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct lm73_data *data = i2c_get_clientdata(client);
+ struct lm73_data *data = dev_get_drvdata(dev);
s32 ctrl;

mutex_lock(&data->lock);
- ctrl = i2c_smbus_read_byte_data(client, LM73_REG_CTRL);
+ ctrl = i2c_smbus_read_byte_data(data->client, LM73_REG_CTRL);
if (ctrl < 0)
goto abort;
data->ctrl = ctrl;
@@ -183,7 +181,7 @@ static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO,
show_maxmin_alarm, NULL, LM73_CTRL_LO_SHIFT);

-static struct attribute *lm73_attributes[] = {
+static struct attribute *lm73_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
@@ -192,10 +190,7 @@ static struct attribute *lm73_attributes[] = {
&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
NULL
};
-
-static const struct attribute_group lm73_group = {
- .attrs = lm73_attributes,
-};
+ATTRIBUTE_GROUPS(lm73);

/*-----------------------------------------------------------------------*/

@@ -204,16 +199,16 @@ static const struct attribute_group lm73_group = {
static int
lm73_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
- int status;
+ struct device *dev = &client->dev;
+ struct device *hwmon_dev;
struct lm73_data *data;
int ctrl;

- data = devm_kzalloc(&client->dev, sizeof(struct lm73_data),
- GFP_KERNEL);
+ data = devm_kzalloc(dev, sizeof(struct lm73_data), GFP_KERNEL);
if (!data)
return -ENOMEM;

- i2c_set_clientdata(client, data);
+ data->client = client;
mutex_init(&data->lock);

ctrl = i2c_smbus_read_byte_data(client, LM73_REG_CTRL);
@@ -221,33 +216,13 @@ lm73_probe(struct i2c_client *client, const struct i2c_device_id *id)
return ctrl;
data->ctrl = ctrl;

- /* Register sysfs hooks */
- status = sysfs_create_group(&client->dev.kobj, &lm73_group);
- if (status)
- return status;
-
- data->hwmon_dev = hwmon_device_register(&client->dev);
- if (IS_ERR(data->hwmon_dev)) {
- status = PTR_ERR(data->hwmon_dev);
- goto exit_remove;
- }
+ hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
+ data, lm73_groups);
+ if (IS_ERR(hwmon_dev))
+ return PTR_ERR(hwmon_dev);

- dev_info(&client->dev, "%s: sensor '%s'\n",
- dev_name(data->hwmon_dev), client->name);
-
- return 0;
-
-exit_remove:
- sysfs_remove_group(&client->dev.kobj, &lm73_group);
- return status;
-}
-
-static int lm73_remove(struct i2c_client *client)
-{
- struct lm73_data *data = i2c_get_clientdata(client);
+ dev_info(dev, "sensor '%s'\n", client->name);

- hwmon_device_unregister(data->hwmon_dev);
- sysfs_remove_group(&client->dev.kobj, &lm73_group);
return 0;
}

@@ -300,7 +275,6 @@ static struct i2c_driver lm73_driver = {
.name = "lm73",
},
.probe = lm73_probe,
- .remove = lm73_remove,
.id_table = lm73_ids,
.detect = lm73_detect,
.address_list = normal_i2c,
--
1.7.9.7