The new-style fscher 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: Reinhard Nissl <rnissl at gmx.de>
---
drivers/hwmon/fscher.c | 93 +++++++++++++++++++++---------------------------
1 file changed, 42 insertions(+), 51 deletions(-)
--- linux-2.6.26-rc9.orig/drivers/hwmon/fscher.c 2008-07-12 09:20:30.000000000 +0200
+++ linux-2.6.26-rc9/drivers/hwmon/fscher.c 2008-07-12 10:27:24.000000000 +0200
@@ -106,9 +106,11 @@ I2C_CLIENT_INSMOD_1(fscher);
* Functions declaration
*/
-static int fscher_attach_adapter(struct i2c_adapter *adapter);
-static int fscher_detect(struct i2c_adapter *adapter, int address, int kind);
-static int fscher_detach_client(struct i2c_client *client);
+static int fscher_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int fscher_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
+static int fscher_remove(struct i2c_client *client);
static struct fscher_data *fscher_update_device(struct device *dev);
static void fscher_init_client(struct i2c_client *client);
@@ -119,12 +121,21 @@ static int fscher_write_value(struct i2c
* Driver data (common to all clients)
*/
+static const struct i2c_device_id fscher_id[] = {
+ { "fscher", fscher },
+ { }
+};
+
static struct i2c_driver fscher_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "fscher",
},
- .attach_adapter = fscher_attach_adapter,
- .detach_client = fscher_detach_client,
+ .probe = fscher_probe,
+ .remove = fscher_remove,
+ .id_table = fscher_id,
+ .detect = fscher_detect,
+ .address_data = &addr_data,
};
/*
@@ -132,7 +143,6 @@ static struct i2c_driver fscher_driver =
*/
struct fscher_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
@@ -283,38 +293,14 @@ static const struct attribute_group fsch
* Real code
*/
-static int fscher_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, fscher_detect);
-}
-
-static int fscher_detect(struct i2c_adapter *adapter, int address, int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int fscher_detect(struct i2c_client *new_client, int kind,
+ struct i2c_board_info *info)
{
- struct i2c_client *new_client;
- struct fscher_data *data;
- int err = 0;
+ struct i2c_adapter *adapter = new_client->adapter;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_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 i2c_smbus_read_byte_data. */
- if (!(data = kzalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- /* The common I2C client data is placed right before the
- * Hermes-specific data. */
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &fscher_driver;
- new_client->flags = 0;
+ return -ENODEV;
/* Do the remaining detection unless force or force_fscher parameter */
if (kind < 0) {
@@ -324,24 +310,35 @@ static int fscher_detect(struct i2c_adap
FSCHER_REG_IDENT_1) != 0x45) /* 'E' */
|| (i2c_smbus_read_byte_data(new_client,
FSCHER_REG_IDENT_2) != 0x52)) /* 'R' */
- goto exit_free;
+ return -ENODEV;
+ }
+
+ strlcpy(info->type, "fscher", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int fscher_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
+{
+ struct fscher_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct fscher_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
}
- /* Fill in the remaining client fields and put it into the
- * global list */
- strlcpy(new_client->name, "fscher", I2C_NAME_SIZE);
+ i2c_set_clientdata(new_client, data);
data->valid = 0;
mutex_init(&data->update_lock);
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(new_client)))
- goto exit_free;
-
fscher_init_client(new_client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj, &fscher_group)))
- goto exit_detach;
+ goto exit_free;
data->hwmon_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->hwmon_dev)) {
@@ -353,25 +350,19 @@ static int fscher_detect(struct i2c_adap
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &fscher_group);
-exit_detach:
- i2c_detach_client(new_client);
exit_free:
kfree(data);
exit:
return err;
}
-static int fscher_detach_client(struct i2c_client *client)
+static int fscher_remove(struct i2c_client *client)
{
struct fscher_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &fscher_group);
- if ((err = i2c_detach_client(client)))
- return err;
-
kfree(data);
return 0;
}
--
Jean Delvare
