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hwmon: (atxp1) Convert to a new-style i2c driver 

The new-style atxp1 driver implements the optional detect() callback
to cover the use cases of the legacy driver.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2008-07-16 19:30:11 +02:00 committed by Jean Delvare
parent 063675b156
commit 71163c7c36
1 changed files with 54 additions and 59 deletions
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113
drivers/hwmon/atxp1.c
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@ -46,21 +46,32 @@ static const unsigned short normal_i2c[] = { 0x37, 0x4e, I2C_CLIENT_END };
I2C_CLIENT_INSMOD_1(atxp1);
static int atxp1_attach_adapter(struct i2c_adapter * adapter);
static int atxp1_detach_client(struct i2c_client * client);
static int atxp1_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int atxp1_remove(struct i2c_client *client);
static struct atxp1_data * atxp1_update_device(struct device *dev);
static int atxp1_detect(struct i2c_adapter *adapter, int address, int kind);
static int atxp1_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info);
static const struct i2c_device_id atxp1_id[] = {
{ "atxp1", atxp1 },
{ }
};
MODULE_DEVICE_TABLE(i2c, atxp1_id);
static struct i2c_driver atxp1_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "atxp1",
},
.attach_adapter = atxp1_attach_adapter,
.detach_client = atxp1_detach_client,
.probe = atxp1_probe,
.remove = atxp1_remove,
.id_table = atxp1_id,
.detect = atxp1_detect,
.address_data = &addr_data,
};
struct atxp1_data {
struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
unsigned long last_updated;
@ -263,35 +274,16 @@ static const struct attribute_group atxp1_group = {
};
static int atxp1_attach_adapter(struct i2c_adapter *adapter)
/* Return 0 if detection is successful, -ENODEV otherwise */
static int atxp1_detect(struct i2c_client *new_client, int kind,
struct i2c_board_info *info)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, &atxp1_detect);
};
struct i2c_adapter *adapter = new_client->adapter;
static int atxp1_detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client * new_client;
struct atxp1_data * data;
int err = 0;
u8 temp;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
if (!(data = kzalloc(sizeof(struct atxp1_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
new_client = &data->client;
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
new_client->driver = &atxp1_driver;
new_client->flags = 0;
return -ENODEV;
/* Detect ATXP1, checking if vendor ID registers are all zero */
if (!((i2c_smbus_read_byte_data(new_client, 0x3e) == 0) &&
@ -305,35 +297,46 @@ static int atxp1_detect(struct i2c_adapter *adapter, int address, int kind)
if (!((i2c_smbus_read_byte_data(new_client, 0x10) == temp) &&
(i2c_smbus_read_byte_data(new_client, 0x11) == temp) ))
goto exit_free;
return -ENODEV;
}
/* Get VRM */
temp = vid_which_vrm();
if ((temp != 90) && (temp != 91)) {
dev_err(&adapter->dev, "atxp1: Not supporting VRM %d.%d\n",
temp / 10, temp % 10);
return -ENODEV;
}
strlcpy(info->type, "atxp1", I2C_NAME_SIZE);
return 0;
}
static int atxp1_probe(struct i2c_client *new_client,
const struct i2c_device_id *id)
{
struct atxp1_data *data;
int err;
data = kzalloc(sizeof(struct atxp1_data), GFP_KERNEL);
if (!data) {
err = -ENOMEM;
goto exit;
}
/* Get VRM */
data->vrm = vid_which_vrm();
if ((data->vrm != 90) && (data->vrm != 91)) {
dev_err(&new_client->dev, "Not supporting VRM %d.%d\n",
data->vrm / 10, data->vrm % 10);
goto exit_free;
}
strncpy(new_client->name, "atxp1", I2C_NAME_SIZE);
i2c_set_clientdata(new_client, data);
data->valid = 0;
mutex_init(&data->update_lock);
err = i2c_attach_client(new_client);
if (err)
{
dev_err(&new_client->dev, "Attach client error.\n");
goto exit_free;
}
/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj, &atxp1_group)))
goto exit_detach;
goto exit_free;
data->hwmon_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->hwmon_dev)) {
@ -348,30 +351,22 @@ static int atxp1_detect(struct i2c_adapter *adapter, int address, int kind)
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &atxp1_group);
exit_detach:
i2c_detach_client(new_client);
exit_free:
kfree(data);
exit:
return err;
};
static int atxp1_detach_client(struct i2c_client * client)
static int atxp1_remove(struct i2c_client *client)
{
struct atxp1_data * data = i2c_get_clientdata(client);
int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &atxp1_group);
err = i2c_detach_client(client);
kfree(data);
if (err)
dev_err(&client->dev, "Failed to detach client.\n");
else
kfree(data);
return err;
return 0;
};
static int __init atxp1_init(void)