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authorJean Delvare <khali@linux-fr.org>2008-07-16 19:30:13 +0200
committerJean Delvare <khali@mahadeva.delvare>2008-07-16 19:30:13 +0200
commita23a9fe1d4d725e1624635f49e9790ec32deffd0 (patch)
tree9135d88399075f435f64299f29e31a76a759ac49
parent95d80e7c834d8742da38e2b9d2f36dec36da03a6 (diff)
hwmon: (gl520sm) Convert to a new-style i2c driver
The new-style gl520sm 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: Maarten Deprez <maartendeprez@users.sourceforge.net>
-rw-r--r--drivers/hwmon/gl520sm.c91
1 files changed, 43 insertions, 48 deletions
diff --git a/drivers/hwmon/gl520sm.c b/drivers/hwmon/gl520sm.c
index 8984ef141627..19616f2242b0 100644
--- a/drivers/hwmon/gl520sm.c
+++ b/drivers/hwmon/gl520sm.c
@@ -79,26 +79,37 @@ static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
* Function declarations
*/
-static int gl520_attach_adapter(struct i2c_adapter *adapter);
-static int gl520_detect(struct i2c_adapter *adapter, int address, int kind);
+static int gl520_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int gl520_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
static void gl520_init_client(struct i2c_client *client);
-static int gl520_detach_client(struct i2c_client *client);
+static int gl520_remove(struct i2c_client *client);
static int gl520_read_value(struct i2c_client *client, u8 reg);
static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
static struct gl520_data *gl520_update_device(struct device *dev);
/* Driver data */
+static const struct i2c_device_id gl520_id[] = {
+ { "gl520sm", gl520sm },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, gl520_id);
+
static struct i2c_driver gl520_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "gl520sm",
},
- .attach_adapter = gl520_attach_adapter,
- .detach_client = gl520_detach_client,
+ .probe = gl520_probe,
+ .remove = gl520_remove,
+ .id_table = gl520_id,
+ .detect = gl520_detect,
+ .address_data = &addr_data,
};
/* Client data */
struct gl520_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until the following fields are valid */
@@ -669,37 +680,15 @@ static const struct attribute_group gl520_group_opt = {
* Real code
*/
-static int gl520_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, gl520_detect);
-}
-
-static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int gl520_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
- struct i2c_client *client;
- struct gl520_data *data;
- int err = 0;
+ struct i2c_adapter *adapter = client->adapter;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA))
- goto exit;
-
- /* 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 gl520_{read,write}_value. */
-
- if (!(data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &gl520_driver;
+ return -ENODEV;
/* Determine the chip type. */
if (kind < 0) {
@@ -707,24 +696,36 @@ static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
dev_dbg(&client->dev, "Unknown chip type, skipping\n");
- goto exit_free;
+ return -ENODEV;
}
}
- /* Fill in the remaining client fields */
- strlcpy(client->name, "gl520sm", I2C_NAME_SIZE);
- mutex_init(&data->update_lock);
+ strlcpy(info->type, "gl520sm", 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 gl520_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct gl520_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
/* Initialize the GL520SM chip */
gl520_init_client(client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
- goto exit_detach;
+ goto exit_free;
if (data->two_temps) {
if ((err = device_create_file(&client->dev,
@@ -764,8 +765,6 @@ static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
exit_remove_files:
sysfs_remove_group(&client->dev.kobj, &gl520_group);
sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
-exit_detach:
- i2c_detach_client(client);
exit_free:
kfree(data);
exit:
@@ -811,18 +810,14 @@ static void gl520_init_client(struct i2c_client *client)
gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
}
-static int gl520_detach_client(struct i2c_client *client)
+static int gl520_remove(struct i2c_client *client)
{
struct gl520_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &gl520_group);
sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
- if ((err = i2c_detach_client(client)))
- return err;
-
kfree(data);
return 0;
}