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hwmon: (adm1029) Convert to a new-style i2c driver 

The new-style adm1029 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: Corentin Labbe <corentin.labbe@geomatys.fr>
This commit is contained in:
Jean Delvare 2008-07-16 19:30:09 +02:00 committed by Jean Delvare
parent 57f7eb0bcb
commit 9c97fb4d25
1 changed files with 44 additions and 53 deletions
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101
drivers/hwmon/adm1029.c
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@ -115,9 +115,11 @@ static const u8 ADM1029_REG_FAN_DIV[] = {
* Functions declaration
*/
static int adm1029_attach_adapter(struct i2c_adapter *adapter);
static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind);
static int adm1029_detach_client(struct i2c_client *client);
static int adm1029_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int adm1029_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info);
static int adm1029_remove(struct i2c_client *client);
static struct adm1029_data *adm1029_update_device(struct device *dev);
static int adm1029_init_client(struct i2c_client *client);
@ -125,12 +127,22 @@ static int adm1029_init_client(struct i2c_client *client);
* Driver data (common to all clients)
*/
static const struct i2c_device_id adm1029_id[] = {
{ "adm1029", adm1029 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adm1029_id);
static struct i2c_driver adm1029_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "adm1029",
},
.attach_adapter = adm1029_attach_adapter,
.detach_client = adm1029_detach_client,
.probe = adm1029_probe,
.remove = adm1029_remove,
.id_table = adm1029_id,
.detect = adm1029_detect,
.address_data = &addr_data,
};
/*
@ -138,7 +150,6 @@ static struct i2c_driver adm1029_driver = {
*/
struct adm1029_data {
struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
@ -284,37 +295,14 @@ static const struct attribute_group adm1029_group = {
* Real code
*/
static int adm1029_attach_adapter(struct i2c_adapter *adapter)
/* Return 0 if detection is successful, -ENODEV otherwise */
static int adm1029_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, adm1029_detect);
}
struct i2c_adapter *adapter = client->adapter;
/*
* The following function does more than just detection. If detection
* succeeds, it also registers the new chip.
*/
static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *client;
struct adm1029_data *data;
int err = 0;
const char *name = "";
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
if (!(data = kzalloc(sizeof(struct adm1029_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
client = &data->client;
i2c_set_clientdata(client, data);
client->addr = address;
client->adapter = adapter;
client->driver = &adm1029_driver;
return -ENODEV;
/* Now we do the detection and identification. A negative kind
* means that the driver was loaded with no force parameter
@ -362,32 +350,41 @@ static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind)
if (kind <= 0) { /* identification failed */
pr_debug("adm1029: Unsupported chip (man_id=0x%02X, "
"chip_id=0x%02X)\n", man_id, chip_id);
goto exit_free;
return -ENODEV;
}
}
strlcpy(info->type, "adm1029", I2C_NAME_SIZE);
return 0;
}
static int adm1029_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct adm1029_data *data;
int err;
data = kzalloc(sizeof(struct adm1029_data), GFP_KERNEL);
if (!data) {
err = -ENOMEM;
goto exit;
}
if (kind == adm1029) {
name = "adm1029";
}
/* We can fill in the remaining client fields */
strlcpy(client->name, name, I2C_NAME_SIZE);
i2c_set_clientdata(client, data);
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 ADM1029 chip
* Check config register
*/
if (adm1029_init_client(client) == 0)
goto exit_detach;
if (adm1029_init_client(client) == 0) {
err = -ENODEV;
goto exit_free;
}
/* Register sysfs hooks */
if ((err = sysfs_create_group(&client->dev.kobj, &adm1029_group)))
goto exit_detach;
goto exit_free;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
@ -399,8 +396,6 @@ static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind)
exit_remove_files:
sysfs_remove_group(&client->dev.kobj, &adm1029_group);
exit_detach:
i2c_detach_client(client);
exit_free:
kfree(data);
exit:
@ -424,17 +419,13 @@ static int adm1029_init_client(struct i2c_client *client)
return 1;
}
static int adm1029_detach_client(struct i2c_client *client)
static int adm1029_remove(struct i2c_client *client)
{
struct adm1029_data *data = i2c_get_clientdata(client);
int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &adm1029_group);
if ((err = i2c_detach_client(client)))
return err;
kfree(data);
return 0;
}