hwmon: (w83l786ng) Convert to a new-style i2c driver
The new-style w83l786ng 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: Kevin Lo <kevlo@kevlo.org>
diff --git a/drivers/hwmon/w83l786ng.c b/drivers/hwmon/w83l786ng.c
index 41e22dd..badca76 100644
--- a/drivers/hwmon/w83l786ng.c
+++ b/drivers/hwmon/w83l786ng.c
@@ -121,7 +121,6 @@
}
struct w83l786ng_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
@@ -146,18 +145,30 @@
u8 tolerance[2];
};
-static int w83l786ng_attach_adapter(struct i2c_adapter *adapter);
-static int w83l786ng_detect(struct i2c_adapter *adapter, int address, int kind);
-static int w83l786ng_detach_client(struct i2c_client *client);
+static int w83l786ng_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int w83l786ng_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
+static int w83l786ng_remove(struct i2c_client *client);
static void w83l786ng_init_client(struct i2c_client *client);
static struct w83l786ng_data *w83l786ng_update_device(struct device *dev);
+static const struct i2c_device_id w83l786ng_id[] = {
+ { "w83l786ng", w83l786ng },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, w83l786ng_id);
+
static struct i2c_driver w83l786ng_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "w83l786ng",
},
- .attach_adapter = w83l786ng_attach_adapter,
- .detach_client = w83l786ng_detach_client,
+ .probe = w83l786ng_probe,
+ .remove = w83l786ng_remove,
+ .id_table = w83l786ng_id,
+ .detect = w83l786ng_detect,
+ .address_data = &addr_data,
};
static u8
@@ -575,42 +586,15 @@
};
static int
-w83l786ng_attach_adapter(struct i2c_adapter *adapter)
+w83l786ng_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, w83l786ng_detect);
-}
-
-static int
-w83l786ng_detect(struct i2c_adapter *adapter, int address, int kind)
-{
- struct i2c_client *client;
- struct device *dev;
- struct w83l786ng_data *data;
- int i, err = 0;
- u8 reg_tmp;
+ struct i2c_adapter *adapter = client->adapter;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
- goto exit;
+ return -ENODEV;
}
- /* OK. For now, we presume we have a valid client. We now create the
- client structure, even though we cannot fill it completely yet.
- But it allows us to access w83l786ng_{read,write}_value. */
-
- if (!(data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- client = &data->client;
- dev = &client->dev;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &w83l786ng_driver;
-
/*
* Now we do the remaining detection. A negative kind means that
* the driver was loaded with no force parameter (default), so we
@@ -627,8 +611,8 @@
W83L786NG_REG_CONFIG) & 0x80) != 0x00)) {
dev_dbg(&adapter->dev,
"W83L786NG detection failed at 0x%02x.\n",
- address);
- goto exit_free;
+ client->addr);
+ return -ENODEV;
}
}
@@ -651,17 +635,31 @@
dev_info(&adapter->dev,
"Unsupported chip (man_id=0x%04X, "
"chip_id=0x%02X).\n", man_id, chip_id);
- goto exit_free;
+ return -ENODEV;
}
}
- /* Fill in the remaining client fields and put into the global list */
- strlcpy(client->name, "w83l786ng", I2C_NAME_SIZE);
- mutex_init(&data->update_lock);
+ strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE);
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(client)))
- goto exit_free;
+ return 0;
+}
+
+static int
+w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct w83l786ng_data *data;
+ int i, err = 0;
+ u8 reg_tmp;
+
+ data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
/* Initialize the chip */
w83l786ng_init_client(client);
@@ -693,25 +691,19 @@
exit_remove:
sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
- i2c_detach_client(client);
-exit_free:
kfree(data);
exit:
return err;
}
static int
-w83l786ng_detach_client(struct i2c_client *client)
+w83l786ng_remove(struct i2c_client *client)
{
struct w83l786ng_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
- if ((err = i2c_detach_client(client)))
- return err;
-
kfree(data);
return 0;