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hwmon: (max6650) Convert to use devm_hwmon_device_register_with_groups

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

Reviewed-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2014-02-11 22:37:01 -08:00
parent 1577f94bce
commit 17eaa25c3e
1 changed files with 28 additions and 49 deletions
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77
drivers/hwmon/max6650.c
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@ -110,7 +110,8 @@ module_param(clock, int, S_IRUGO);
*/
struct max6650_data {
struct device *hwmon_dev;
struct i2c_client *client;
const struct attribute_group *groups[3];
struct mutex update_lock;
int nr_fans;
char valid; /* zero until following fields are valid */
@ -134,9 +135,9 @@ static const u8 tach_reg[] = {
static struct max6650_data *max6650_update_device(struct device *dev)
{
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int i;
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
mutex_lock(&data->update_lock);
@ -254,8 +255,8 @@ static ssize_t get_target(struct device *dev, struct device_attribute *devattr,
static ssize_t set_target(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int kscale, ktach;
unsigned long rpm;
int err;
@ -323,8 +324,8 @@ static ssize_t get_pwm(struct device *dev, struct device_attribute *devattr,
static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long pwm;
int err;
@ -369,8 +370,8 @@ static ssize_t get_enable(struct device *dev, struct device_attribute *devattr,
static ssize_t set_enable(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int max6650_modes[3] = {0, 3, 2};
unsigned long mode;
int err;
@ -419,8 +420,8 @@ static ssize_t get_div(struct device *dev, struct device_attribute *devattr,
static ssize_t set_div(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long div;
int err;
@ -465,7 +466,7 @@ static ssize_t get_alarm(struct device *dev, struct device_attribute *devattr,
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct max6650_data *data = max6650_update_device(dev);
struct i2c_client *client = to_i2c_client(dev);
struct i2c_client *client = data->client;
int alarm = 0;
if (data->alarm & attr->index) {
@ -503,7 +504,8 @@ static umode_t max6650_attrs_visible(struct kobject *kobj, struct attribute *a,
int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
u8 alarm_en = i2c_smbus_read_byte_data(client, MAX6650_REG_ALARM_EN);
struct device_attribute *devattr;
@ -538,7 +540,7 @@ static struct attribute *max6650_attrs[] = {
NULL
};
static struct attribute_group max6650_attr_grp = {
static const struct attribute_group max6650_group = {
.attrs = max6650_attrs,
.is_visible = max6650_attrs_visible,
};
@ -550,7 +552,7 @@ static struct attribute *max6651_attrs[] = {
NULL
};
static const struct attribute_group max6651_attr_grp = {
static const struct attribute_group max6651_group = {
.attrs = max6651_attrs,
};
@ -558,9 +560,9 @@ static const struct attribute_group max6651_attr_grp = {
* Real code
*/
static int max6650_init_client(struct i2c_client *client)
static int max6650_init_client(struct max6650_data *data,
struct i2c_client *client)
{
struct max6650_data *data = i2c_get_clientdata(client);
int config;
int err = -EIO;
@ -649,6 +651,7 @@ static int max6650_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct max6650_data *data;
struct device *hwmon_dev;
int err;
data = devm_kzalloc(&client->dev, sizeof(struct max6650_data),
@ -658,49 +661,26 @@ static int max6650_probe(struct i2c_client *client,
return -ENOMEM;
}
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->update_lock);
data->nr_fans = id->driver_data;
/*
* Initialize the max6650 chip
*/
err = max6650_init_client(client);
err = max6650_init_client(data, client);
if (err)
return err;
err = sysfs_create_group(&client->dev.kobj, &max6650_attr_grp);
if (err)
return err;
data->groups[0] = &max6650_group;
/* 3 additional fan inputs for the MAX6651 */
if (data->nr_fans == 4) {
err = sysfs_create_group(&client->dev.kobj, &max6651_attr_grp);
if (err)
goto err_remove;
}
data->hwmon_dev = hwmon_device_register(&client->dev);
if (!IS_ERR(data->hwmon_dev))
return 0;
err = PTR_ERR(data->hwmon_dev);
dev_err(&client->dev, "error registering hwmon device.\n");
if (data->nr_fans == 4)
sysfs_remove_group(&client->dev.kobj, &max6651_attr_grp);
err_remove:
sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
return err;
}
data->groups[1] = &max6651_group;
static int max6650_remove(struct i2c_client *client)
{
struct max6650_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
if (data->nr_fans == 4)
sysfs_remove_group(&client->dev.kobj, &max6651_attr_grp);
sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
client->name, data,
data->groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id max6650_id[] = {
@ -715,7 +695,6 @@ static struct i2c_driver max6650_driver = {
.name = "max6650",
},
.probe = max6650_probe,
.remove = max6650_remove,
.id_table = max6650_id,
};