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hwmon: (smsc47m192) Convert to a new-style i2c driver 

The new-style smsc47m192 driver implements the optional detect()
callback to cover the use cases of the legacy driver.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Hartmut Rick <linux@rick.claranet.de>
This commit is contained in:
Jean Delvare 2008-07-16 19:30:16 +02:00 committed by Jean Delvare
parent 0d57abd5b8
commit 8fb597bb6e
1 changed files with 46 additions and 56 deletions
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102
drivers/hwmon/smsc47m192.c
View File

@ -96,7 +96,6 @@ static inline int TEMP_FROM_REG(s8 val)
}
struct smsc47m192_data {
struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
@ -114,18 +113,29 @@ struct smsc47m192_data {
u8 vrm;
};
static int smsc47m192_attach_adapter(struct i2c_adapter *adapter);
static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
int kind);
static int smsc47m192_detach_client(struct i2c_client *client);
static int smsc47m192_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int smsc47m192_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info);
static int smsc47m192_remove(struct i2c_client *client);
static struct smsc47m192_data *smsc47m192_update_device(struct device *dev);
static const struct i2c_device_id smsc47m192_id[] = {
{ "smsc47m192", smsc47m192 },
{ }
};
MODULE_DEVICE_TABLE(i2c, smsc47m192_id);
static struct i2c_driver smsc47m192_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "smsc47m192",
},
.attach_adapter = smsc47m192_attach_adapter,
.detach_client = smsc47m192_detach_client,
.probe = smsc47m192_probe,
.remove = smsc47m192_remove,
.id_table = smsc47m192_id,
.detect = smsc47m192_detect,
.address_data = &addr_data,
};
/* Voltages */
@ -440,17 +450,6 @@ static const struct attribute_group smsc47m192_group_in4 = {
.attrs = smsc47m192_attributes_in4,
};
/* This function is called when:
* smsc47m192_driver is inserted (when this module is loaded), for each
available adapter
* when a new adapter is inserted (and smsc47m192_driver is still present) */
static int smsc47m192_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, smsc47m192_detect);
}
static void smsc47m192_init_client(struct i2c_client *client)
{
int i;
@ -481,31 +480,15 @@ static void smsc47m192_init_client(struct i2c_client *client)
}
}
/* This function is called by i2c_probe */
static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
int kind)
/* Return 0 if detection is successful, -ENODEV otherwise */
static int smsc47m192_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info)
{
struct i2c_client *client;
struct smsc47m192_data *data;
int err = 0;
int version, config;
struct i2c_adapter *adapter = client->adapter;
int version;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
if (!(data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
client = &data->client;
i2c_set_clientdata(client, data);
client->addr = address;
client->adapter = adapter;
client->driver = &smsc47m192_driver;
if (kind == 0)
kind = smsc47m192;
return -ENODEV;
/* Detection criteria from sensors_detect script */
if (kind < 0) {
@ -523,26 +506,39 @@ static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
} else {
dev_dbg(&adapter->dev,
"SMSC47M192 detection failed at 0x%02x\n",
address);
goto exit_free;
client->addr);
return -ENODEV;
}
}
/* Fill in the remaining client fields and put into the global list */
strlcpy(client->name, "smsc47m192", I2C_NAME_SIZE);
strlcpy(info->type, "smsc47m192", I2C_NAME_SIZE);
return 0;
}
static int smsc47m192_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct smsc47m192_data *data;
int config;
int err;
data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL);
if (!data) {
err = -ENOMEM;
goto exit;
}
i2c_set_clientdata(client, data);
data->vrm = vid_which_vrm();
mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(client)))
goto exit_free;
/* Initialize the SMSC47M192 chip */
smsc47m192_init_client(client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group)))
goto exit_detach;
goto exit_free;
/* Pin 110 is either in4 (+12V) or VID4 */
config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
@ -563,26 +559,20 @@ static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
exit_remove_files:
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
exit_detach:
i2c_detach_client(client);
exit_free:
kfree(data);
exit:
return err;
}
static int smsc47m192_detach_client(struct i2c_client *client)
static int smsc47m192_remove(struct i2c_client *client)
{
struct smsc47m192_data *data = i2c_get_clientdata(client);
int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
if ((err = i2c_detach_client(client)))
return err;
kfree(data);
return 0;