[PATCH 10/11] hwmon: (ltc4261) Convert to use devm_hwmon_device_register_with_groups

Guenter Roeck
2013-09-14T17:14:52Z

Also use new macro ATTRIBUTE_GROUPS to declare attribute groups.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
drivers/hwmon/ltc4261.c | 55 ++++++++++++++---------------------------------
1 file changed, 16 insertions(+), 39 deletions(-)

diff --git a/drivers/hwmon/ltc4261.c b/drivers/hwmon/ltc4261.c
index 487da58..6c50db9 100644
--- a/drivers/hwmon/ltc4261.c
+++ b/drivers/hwmon/ltc4261.c
@@ -55,7 +55,7 @@
#define FAULT_OC (1<<2)

struct ltc4261_data {
- struct device *hwmon_dev;
+ struct i2c_client *client;

struct mutex update_lock;
bool valid;
@@ -67,8 +67,8 @@ struct ltc4261_data {

static struct ltc4261_data *ltc4261_update_device(struct device *dev)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct ltc4261_data *data = i2c_get_clientdata(client);
+ struct ltc4261_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
struct ltc4261_data *ret = data;

mutex_lock(&data->update_lock);
@@ -150,7 +150,6 @@ static ssize_t ltc4261_show_bool(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 ltc4261_data *data = ltc4261_update_device(dev);
u8 fault;

@@ -159,7 +158,7 @@ static ssize_t ltc4261_show_bool(struct device *dev,

fault = data->regs[LTC4261_FAULT] & attr->index;
if (fault) /* Clear reported faults in chip register */
- i2c_smbus_write_byte_data(client, LTC4261_FAULT, ~fault);
+ i2c_smbus_write_byte_data(data->client, LTC4261_FAULT, ~fault);

return snprintf(buf, PAGE_SIZE, "%d\n", fault ? 1 : 0);
}
@@ -197,7 +196,7 @@ static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ltc4261_show_value, NULL,
static SENSOR_DEVICE_ATTR(curr1_max_alarm, S_IRUGO, ltc4261_show_bool, NULL,
FAULT_OC);

-static struct attribute *ltc4261_attributes[] = {
+static struct attribute *ltc4261_attrs[] = {
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_min_alarm.dev_attr.attr,
&sensor_dev_attr_in1_max_alarm.dev_attr.attr,
@@ -210,60 +209,39 @@ static struct attribute *ltc4261_attributes[] = {

NULL,
};
-
-static const struct attribute_group ltc4261_group = {
- .attrs = ltc4261_attributes,
-};
+ATTRIBUTE_GROUPS(ltc4261);

static int ltc4261_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
+ struct device *dev = &client->dev;
struct ltc4261_data *data;
- int ret;
+ struct device *hwmon_dev;

if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;

if (i2c_smbus_read_byte_data(client, LTC4261_STATUS) < 0) {
- dev_err(&client->dev, "Failed to read status register\n");
+ dev_err(dev, "Failed to read status register\n");
return -ENODEV;
}

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

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

/* Clear faults */
i2c_smbus_write_byte_data(client, LTC4261_FAULT, 0x00);

- /* Register sysfs hooks */
- ret = sysfs_create_group(&client->dev.kobj, &ltc4261_group);
- if (ret)
- return ret;
-
- data->hwmon_dev = hwmon_device_register(&client->dev);
- if (IS_ERR(data->hwmon_dev)) {
- ret = PTR_ERR(data->hwmon_dev);
- goto out_hwmon_device_register;
- }
-
- return 0;
-
-out_hwmon_device_register:
- sysfs_remove_group(&client->dev.kobj, &ltc4261_group);
- return ret;
-}
-
-static int ltc4261_remove(struct i2c_client *client)
-{
- struct ltc4261_data *data = i2c_get_clientdata(client);
-
- hwmon_device_unregister(data->hwmon_dev);
- sysfs_remove_group(&client->dev.kobj, &ltc4261_group);
+ hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
+ data,
+ ltc4261_groups);
+ if (IS_ERR(hwmon_dev))
+ return PTR_ERR(hwmon_dev);

return 0;
}
@@ -281,7 +259,6 @@ static struct i2c_driver ltc4261_driver = {
.name = "ltc4261",
},
.probe = ltc4261_probe,
- .remove = ltc4261_remove,
.id_table = ltc4261_id,
};

--
1.7.9.7