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hwmon: (lm95241) Convert to use devm_hwmon_device_register_with_groups 

Simplify code, reduce code size, and attach hwmon attributes
to hwmon device.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2014-01-20 09:25:50 -08:00
parent 0414855fdc
commit f809621e8c
1 changed files with 30 additions and 61 deletions
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91
drivers/hwmon/lm95241.c
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@ -89,7 +89,7 @@ static const u8 lm95241_reg_address[] = {
/* Client data (each client gets its own) */
struct lm95241_data {
struct device *hwmon_dev;
struct i2c_client *client;
struct mutex update_lock;
unsigned long last_updated, interval; /* in jiffies */
char valid; /* zero until following fields are valid */
@ -113,8 +113,8 @@ static int temp_from_reg_unsigned(u8 val_h, u8 val_l)
static struct lm95241_data *lm95241_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
mutex_lock(&data->update_lock);
@ -122,7 +122,7 @@ static struct lm95241_data *lm95241_update_device(struct device *dev)
!data->valid) {
int i;
dev_dbg(&client->dev, "Updating lm95241 data.\n");
dev_dbg(dev, "Updating lm95241 data.\n");
for (i = 0; i < ARRAY_SIZE(lm95241_reg_address); i++)
data->temp[i]
= i2c_smbus_read_byte_data(client,
@ -153,8 +153,7 @@ static ssize_t show_input(struct device *dev, struct device_attribute *attr,
static ssize_t show_type(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE - 1,
data->model & to_sensor_dev_attr(attr)->index ? "1\n" : "2\n");
@ -163,8 +162,8 @@ static ssize_t show_type(struct device *dev, struct device_attribute *attr,
static ssize_t set_type(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
int shift;
u8 mask = to_sensor_dev_attr(attr)->index;
@ -201,8 +200,7 @@ static ssize_t set_type(struct device *dev, struct device_attribute *attr,
static ssize_t show_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE - 1,
data->config & to_sensor_dev_attr(attr)->index ?
@ -212,8 +210,7 @@ static ssize_t show_min(struct device *dev, struct device_attribute *attr,
static ssize_t set_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
long val;
if (kstrtol(buf, 10, &val) < 0)
@ -229,7 +226,8 @@ static ssize_t set_min(struct device *dev, struct device_attribute *attr,
data->config &= ~to_sensor_dev_attr(attr)->index;
data->valid = 0;
i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config);
i2c_smbus_write_byte_data(data->client, LM95241_REG_RW_CONFIG,
data->config);
mutex_unlock(&data->update_lock);
@ -239,8 +237,7 @@ static ssize_t set_min(struct device *dev, struct device_attribute *attr,
static ssize_t show_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE - 1,
data->config & to_sensor_dev_attr(attr)->index ?
@ -250,8 +247,7 @@ static ssize_t show_max(struct device *dev, struct device_attribute *attr,
static ssize_t set_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
long val;
if (kstrtol(buf, 10, &val) < 0)
@ -267,7 +263,8 @@ static ssize_t set_max(struct device *dev, struct device_attribute *attr,
data->config &= ~to_sensor_dev_attr(attr)->index;
data->valid = 0;
i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config);
i2c_smbus_write_byte_data(data->client, LM95241_REG_RW_CONFIG,
data->config);
mutex_unlock(&data->update_lock);
@ -286,8 +283,7 @@ static ssize_t show_interval(struct device *dev, struct device_attribute *attr,
static ssize_t set_interval(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
@ -316,7 +312,7 @@ static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max, set_max,
static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval,
set_interval);
static struct attribute *lm95241_attributes[] = {
static struct attribute *lm95241_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
@ -329,10 +325,7 @@ static struct attribute *lm95241_attributes[] = {
&dev_attr_update_interval.attr,
NULL
};
static const struct attribute_group lm95241_group = {
.attrs = lm95241_attributes,
};
ATTRIBUTE_GROUPS(lm95241);
/* Return 0 if detection is successful, -ENODEV otherwise */
static int lm95241_detect(struct i2c_client *new_client,
@ -366,10 +359,9 @@ static int lm95241_detect(struct i2c_client *new_client,
return 0;
}
static void lm95241_init_client(struct i2c_client *client)
static void lm95241_init_client(struct i2c_client *client,
struct lm95241_data *data)
{
struct lm95241_data *data = i2c_get_clientdata(client);
data->interval = HZ; /* 1 sec default */
data->valid = 0;
data->config = CFG_CR0076;
@ -385,49 +377,27 @@ static void lm95241_init_client(struct i2c_client *client)
data->model);
}
static int lm95241_probe(struct i2c_client *new_client,
static int lm95241_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct lm95241_data *data;
int err;
struct device *hwmon_dev;
data = devm_kzalloc(&new_client->dev, sizeof(struct lm95241_data),
GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(struct lm95241_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(new_client, data);
data->client = client;
mutex_init(&data->update_lock);
/* Initialize the LM95241 chip */
lm95241_init_client(new_client);
lm95241_init_client(client, data);
/* Register sysfs hooks */
err = sysfs_create_group(&new_client->dev.kobj, &lm95241_group);
if (err)
return err;
data->hwmon_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove_files;
}
return 0;
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &lm95241_group);
return err;
}
static int lm95241_remove(struct i2c_client *client)
{
struct lm95241_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &lm95241_group);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data,
lm95241_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
/* Driver data (common to all clients) */
@ -444,7 +414,6 @@ static struct i2c_driver lm95241_driver = {
.name = DEVNAME,
},
.probe = lm95241_probe,
.remove = lm95241_remove,
.id_table = lm95241_id,
.detect = lm95241_detect,
.address_list = normal_i2c,