hwmon: (fscpos) Convert to a new-style i2c driver
The new-style fscpos driver implements the optional detect() callback
to cover the use cases of the legacy driver.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/fscpos.c b/drivers/hwmon/fscpos.c
index 00f4848..8a7bcf5 100644
--- a/drivers/hwmon/fscpos.c
+++ b/drivers/hwmon/fscpos.c
@@ -87,9 +87,11 @@
/*
* Functions declaration
*/
-static int fscpos_attach_adapter(struct i2c_adapter *adapter);
-static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind);
-static int fscpos_detach_client(struct i2c_client *client);
+static int fscpos_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int fscpos_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
+static int fscpos_remove(struct i2c_client *client);
static int fscpos_read_value(struct i2c_client *client, u8 reg);
static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value);
@@ -101,19 +103,27 @@
/*
* Driver data (common to all clients)
*/
+static const struct i2c_device_id fscpos_id[] = {
+ { "fscpos", fscpos },
+ { }
+};
+
static struct i2c_driver fscpos_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "fscpos",
},
- .attach_adapter = fscpos_attach_adapter,
- .detach_client = fscpos_detach_client,
+ .probe = fscpos_probe,
+ .remove = fscpos_remove,
+ .id_table = fscpos_id,
+ .detect = fscpos_detect,
+ .address_data = &addr_data,
};
/*
* Client data (each client gets its own)
*/
struct fscpos_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* 0 until following fields are valid */
@@ -470,39 +480,14 @@
.attrs = fscpos_attributes,
};
-static int fscpos_attach_adapter(struct i2c_adapter *adapter)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int fscpos_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, fscpos_detect);
-}
-
-static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind)
-{
- struct i2c_client *new_client;
- struct fscpos_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 fscpos_{read,write}_value.
- */
-
- if (!(data = kzalloc(sizeof(struct fscpos_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 = &fscpos_driver;
- new_client->flags = 0;
+ return -ENODEV;
/* Do the remaining detection unless force or force_fscpos parameter */
if (kind < 0) {
@@ -512,22 +497,30 @@
!= 0x45) /* 'E' */
|| (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2)
!= 0x47))/* 'G' */
- {
- dev_dbg(&new_client->dev, "fscpos detection failed\n");
- goto exit_free;
- }
+ return -ENODEV;
}
- /* Fill in the remaining client fields and put it in the global list */
- strlcpy(new_client->name, "fscpos", I2C_NAME_SIZE);
+ strlcpy(info->type, "fscpos", I2C_NAME_SIZE);
+ return 0;
+}
+
+static int fscpos_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
+{
+ struct fscpos_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct fscpos_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ 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;
-
/* Inizialize the fscpos chip */
fscpos_init_client(new_client);
@@ -536,7 +529,7 @@
/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj, &fscpos_group)))
- goto exit_detach;
+ goto exit_free;
data->hwmon_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->hwmon_dev)) {
@@ -548,24 +541,19 @@
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &fscpos_group);
-exit_detach:
- i2c_detach_client(new_client);
exit_free:
kfree(data);
exit:
return err;
}
-static int fscpos_detach_client(struct i2c_client *client)
+static int fscpos_remove(struct i2c_client *client)
{
struct fscpos_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &fscpos_group);
- if ((err = i2c_detach_client(client)))
- return err;
kfree(data);
return 0;
}