The new-style max6650 driver implements the optional detect() callback
to cover the use cases of the legacy driver.
Signed-off-by: Jean Delvare <khali at linux-fr.org>
Cc: Hans J. Koch <hjk at linutronix.de>
---
drivers/hwmon/max6650.c | 102 +++++++++++++++++++++--------------------------
1 file changed, 47 insertions(+), 55 deletions(-)
--- linux-2.6.26-rc9.orig/drivers/hwmon/max6650.c 2008-07-12 09:20:29.000000000 +0200
+++ linux-2.6.26-rc9/drivers/hwmon/max6650.c 2008-07-12 10:27:13.000000000 +0200
@@ -104,22 +104,34 @@ I2C_CLIENT_INSMOD_1(max6650);
#define DIV_FROM_REG(reg) (1 << (reg & 7))
-static int max6650_attach_adapter(struct i2c_adapter *adapter);
-static int max6650_detect(struct i2c_adapter *adapter, int address, int kind);
+static int max6650_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int max6650_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
static int max6650_init_client(struct i2c_client *client);
-static int max6650_detach_client(struct i2c_client *client);
+static int max6650_remove(struct i2c_client *client);
static struct max6650_data *max6650_update_device(struct device *dev);
/*
* Driver data (common to all clients)
*/
+static const struct i2c_device_id max6650_id[] = {
+ { "max6650", max6650 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max6650_id);
+
static struct i2c_driver max6650_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "max6650",
},
- .attach_adapter = max6650_attach_adapter,
- .detach_client = max6650_detach_client,
+ .probe = max6650_probe,
+ .remove = max6650_remove,
+ .id_table = max6650_id,
+ .detect = max6650_detect,
+ .address_data = &addr_data,
};
/*
@@ -128,7 +140,6 @@ static struct i2c_driver max6650_driver
struct max6650_data
{
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
@@ -437,47 +448,21 @@ static struct attribute_group max6650_at
* Real code
*/
-static int max6650_attach_adapter(struct i2c_adapter *adapter)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int max6650_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
- if (!(adapter->class & I2C_CLASS_HWMON)) {
- dev_dbg(&adapter->dev,
- "FATAL: max6650_attach_adapter class HWMON not set\n");
- return 0;
- }
-
- return i2c_probe(adapter, &addr_data, max6650_detect);
-}
-
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-
-static int max6650_detect(struct i2c_adapter *adapter, int address, int kind)
-{
- struct i2c_client *client;
- struct max6650_data *data;
- int err = -ENODEV;
+ struct i2c_adapter *adapter = client->adapter;
+ int address = client->addr;
dev_dbg(&adapter->dev, "max6650_detect called, kind = %d\n", kind);
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_dbg(&adapter->dev, "max6650: I2C bus doesn't support "
"byte read mode, skipping.\n");
- return 0;
- }
-
- if (!(data = kzalloc(sizeof(struct max6650_data), GFP_KERNEL))) {
- dev_err(&adapter->dev, "max6650: out of memory.\n");
- return -ENOMEM;
+ return -ENODEV;
}
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &max6650_driver;
-
/*
* Now we do the remaining detection. A negative kind means that
* the driver was loaded with no force parameter (default), so we
@@ -501,28 +486,40 @@ static int max6650_detect(struct i2c_ada
||(i2c_smbus_read_byte_data(client, MAX6650_REG_COUNT) & 0xFC))) {
dev_dbg(&adapter->dev,
"max6650: detection failed at 0x%02x.\n", address);
- goto err_free;
+ return -ENODEV;
}
dev_info(&adapter->dev, "max6650: chip found at 0x%02x.\n", address);
- strlcpy(client->name, "max6650", I2C_NAME_SIZE);
- mutex_init(&data->update_lock);
+ strlcpy(info->type, "max6650", I2C_NAME_SIZE);
- if ((err = i2c_attach_client(client))) {
- dev_err(&adapter->dev, "max6650: failed to attach client.\n");
- goto err_free;
+ return 0;
+}
+
+static int max6650_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct max6650_data *data;
+ int err;
+
+ if (!(data = kzalloc(sizeof(struct max6650_data), GFP_KERNEL))) {
+ dev_err(&client->dev, "out of memory.\n");
+ return -ENOMEM;
}
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+
/*
* Initialize the max6650 chip
*/
- if (max6650_init_client(client))
- goto err_detach;
+ err = max6650_init_client(client);
+ if (err)
+ goto err_free;
err = sysfs_create_group(&client->dev.kobj, &max6650_attr_grp);
if (err)
- goto err_detach;
+ goto err_free;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (!IS_ERR(data->hwmon_dev))
@@ -531,24 +528,19 @@ static int max6650_detect(struct i2c_ada
err = PTR_ERR(data->hwmon_dev);
dev_err(&client->dev, "error registering hwmon device.\n");
sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
-err_detach:
- i2c_detach_client(client);
err_free:
kfree(data);
return err;
}
-static int max6650_detach_client(struct i2c_client *client)
+static int max6650_remove(struct i2c_client *client)
{
struct max6650_data *data = i2c_get_clientdata(client);
- int err;
sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
hwmon_device_unregister(data->hwmon_dev);
- err = i2c_detach_client(client);
- if (!err)
- kfree(data);
- return err;
+ kfree(data);
+ return 0;
}
static int max6650_init_client(struct i2c_client *client)
--
Jean Delvare
